How to use a Lego Technic differential for creating prime gear ratios for MOCs. Part 1 Technic Brick Power 2026-09-20 | How to use a Lego Technic differential for creating prime gear ratios for MOCs. Part 1
Lego Technic Spirograph Short Technic Brick Power 2025-01-24 | #shortLego Technic Spirograph by TechnicBrickPower
Spirograph Machine - Lego Technic Technic Brick Power 2023-12-19 | Here I present a Lego Technic Spirograph machine programmed using Powered Up. The powered up controller is used to maintain the desired gearing ratio between the turn table and the inner gear to draw a spirograph that replicates the real original spirograph drawing toy.#legotechnic #technicbrickpower
Lego Technic LED Panel Technic Brick Power 2023-03-27 | This video shows a Lego Technic 7 segment LED panel that can count upwards from 0 to 9.#legotechnic, #technicbrickpower
Lego Technic Ball Gun! Technic Brick Power 2023-03-13 | This lego technic ball gun can shoot 7.8mm plastic balls up to 5 meters. The gun is driven by two pull back motors that drive the firing mechanism. The gun has a changeable magazine holding 12 balls. Youi recock the gun with a manual lever and then reload by pulling the reloading mechanism. The gun can fire up to 5 meters and is very accurate at short distances. It has sight and is modelled after a machine gun. #shorts,, #legotechnic, #technicbrickpower
Lego Technic Ball Gun Technic Brick Power 2023-03-04 | This lego technic ball gun can shoot 7.8mm plastic balls. The gun is driven by two pull back motors that drive the firing mechanism. The gun has a changeable magazine holding 12 balls. Youi recock the gun with a manual lever and then reload by pulling the reloading mechanism. The gun can fire up to 5 meters and is very accurate at short distances. It has sight and is modelled after a machine gun.#legotechnic, #technicbrickpower
Lego Technic RoboDog Technic Brick Power 2023-01-09 | A four legged robot dog made out of Lego Technic is demonstrated. The robot is made of 4 powered up medium motors for the legs and one for the balancing mechanism on top. The robot dog can walk forward, backwards and can turn left and right.It is controlled via a Powered Up app program running on a tablet.#technicbrickpower, #legotechnic #lego
Lego Technic 7 Segment LED Panel - Hexadecimal Counter Technic Brick Power 2022-10-08 | This video shows a Lego Technic 7 segment LED panel that can count upwards or downwards using a track driven program via tow ball pins. The LED display can be programmed to show digits or one of 17 different letters to make a sequential display to animate small text messages.The panel is driven either by hand using a crank or via a Powered Up motor. You can select which one to use via a manual switch.#legotechnic, #technicbrickpower
Lego Technic Beyblade Battle Launcher Technic Brick Power 2022-08-19 | This video presents a Lego Technic version of the spinning top battle game "Beyblade". A Lego Technic launcher for spinning tops made out of Lego is demonstrated and a number of battles are fought between various top designs. The launcher uses a high speed buwizz buggy motor to drive the spinning tops at high speeds.Find out the Lego Technic tops that rules supreme!#legotechnic, #technicbrickpower
Lego Technic PU 2 Speed Automatic Gearbox Technic Brick Power 2022-07-08 | This video presents a lego technic two speed automatic gearbox using two motors and the Powered Up (PU) lego technic control system. Each motor uses a pivoting gear to either connect to it's gear to the left when rotating in the forward direction or to the gear to the right when reversing. This allows the gearbox to switch between four different states to produce a high gear and a low gear in the forward direction as well as a high and low gear in reverse.The motors are disengaged from the main gearing output by moving the pivot to the center.The high gearing ration is 4/9 and the low gearing is 4/27 (one third on the high gear).#legotechnic, #technicbrickpower Visit technicbrickpower.com for more lego ideas and tools.@TechnicBrickPower
Lego Technic Powerful 2 Speed Auto Gearbox Technic Brick Power 2022-06-03 | Here I present my design for a compact and powerful Lego Technic 2 speed automatic gearbox.The gearbox uses the Lego Technic Powered Up functions to detect speed and deduce torque from that to make gear switching decisions. The gearbox switches between a high gear of 1 to 4, to a low gear of 1 to 12 (giving 3 times the torque at the output).The gearbox is demonstrated using a proof of concept pushing vehicle to push two Lego Technic models across a table top. In the high gear the vehicle can only push one model, however when switching down a gear it can push both models.The gearbox is so strong it can twist an axle more than three revolutions.#technicbrickpower, #legotechnic Build Instructions:rebrickable.com/mocs/MOC-114041/TechnicBrickPower/powerful-2-speed-automatic-gearbox-powered-up
Lego Technic New 12/20 Gear High Speed Friction Test Technic Brick Power 2022-05-21 | The Lego Technic set 42140 App-Controlled Transformation Vehicle introduces two new gears - a flat version of the 12 tooth bevel gear and a flat version of the 20 tooth bevel gear. These gears are designed to have less friction. In this follow up video I measure the high speed difference in friction between the new 12 and 20 tooth gears and the current bevel versions of these gears by running a high speed experiment with an up gearing of fifteen times.In this experiment a symmetrical mirror image setup with two motors is used, where one motor drives a gear train using the bevel gears and the other motor drives an equivalent gear train using the new flat versions. The speeds of the motors are compared using a differential and the relative torque loss calculated using the linear motor relationship between speed and torque.VISIT: technicbrickpower.com#legotechnic #technicbrickpower
New Flat 12/20 Gear Friction Technic Brick Power 2022-04-23 | The Lego Technic set 42140 App-Controlled Transformation Vehicle introduces two new gears - a flat version of the 12 tooth bevel gear and a flat version of the 20 tooth bevel gear. These gears are designed to have less friction. In this video I measure the difference in gearing efficiency between two gearboxes - one made from a stack of 3 of the original 12 and 20 tooth gears to create a 27 to 125 gearing ratio, and a similar version made from the new flat 12 and 20 tooth gears.The gear box losses are measured using a powered up motor and a powered up App to determined the efficiency of each gear box by lifting different weights. The results are presented and compared for each gearbox.VISIT: technicbrickpower.com#legotechnic #technicbrickpower
Lego Technic Pi Day Machine Technic Brick Power 2022-03-14 | Here I present a Pi Day special Lego Technic machine that produces a gearing ratio of Pi/8 using a 56mm wheel driving a 13x13 square wheel. The correctness of the ratio is confirmed by matching it with output of a 2 differential gearing system that produces a ratio of 355/904 also approximating pi/8 to 7 significant figures.Watch Pi Day 2020: youtu.be/fGg11gqZy8MWatch Pi Day 2021: youtu.be/kcjW5oUxvdUWatch Differentials Part 3: youtu.be/ORvnzx36j2gSUPPORT THIS CHANNEL SUBSCRIBE: tinyurl.com/s2frxnf#technicbrickpower #legotechnic
Lego Technic 100 Part 4 Speed Gearbox Technic Brick Power 2022-03-06 | This video shows how to make a Lego Technic 4 Speed gearbox using 100 parts. The gearbox is a manual gearbox makes gearing ratios of 1/3, 5/9, 1/1 and 5/3.The gearbox is demonstrated by hand and by using a Lego Technic Large Power functions motor.VISIT: technicbrickpower.comSUBSCRIBE: tinyurl.com/s2frxnf#technicbrickpower, #legotechnic
Lego Technic Powered Up Tutorial2 - Speed Control Technic Brick Power 2022-02-19 | This is my second Lego Technic Powered Up Tutorial that focusses on Lego Technic motor speed control using the Powered Up hub and Powered Up programming interface. The Lego Powered Up App is run on a Samsung Android tablet. I demonstrate how to set and control the power level applied to a motor. Also shown is how to measure the motor speed using the Powered Up built in speed measurement widget. This speed display does not have clear unit values and I show a method for measuring the RPM (revolutions per minute) using an angular position sampling loop.If you are new to Powered Up programming then watch my first tutorial for an introductionTUTORIAL 1youtu.be/0G6Qf5NHPWMSubscribe: tinyurl.com/s2frxnfVisit: technicbrickpower.com#legotechnic, #technicbrickpower, #poweredup
Lego Technic Table Tennis Robot Technic Brick Power 2021-12-24 | A Lego Technic Table Tennis robot is demonstrated. The table tennis robot can launch balls at up to 10 m/s using two lego technic buggy motors driving a pair of 46mm wheels. The ball baskets holds up to 60 balls that can be fired at the player at an adjustable rate of between 1 ball per second to 1 ball every 3 seconds. The firing angle is adjustable between 15 and 45 degrees using the buwizz 3.0 pro and application on an android tablet.The robot can produce topspin or backspin depending on the relative speed of the ball launch wheels. The robot is demonstrated on a table tennis table in backhand mode.The lego technic table tennis robot is made of 1708 parts and measures 39.1cm x 27.2cm x 38.6cm and weight 1.593 kg.SUBSCRIBE: tinyurl.com/s2frxnfVISIT: technicbrickpower.com#technicbrickpower #legotechnic
Lego Technic Elbow Art Technic Brick Power 2021-11-26 | This video presents an online program for generating loops out of Lego elbow pieces. Elbow pieces (part #25214) are used in many Lego Technic models as a decorative part to create tube like structures.You can search for loops within different sized spaces and set the number of elbow pieces to be used. The programs supports both loops and dual axle mounted solutions.A dynamic model is demonstrated using two elbow model solutions using about 80-85 elbow pieces each. The model is driven by a medium PF motor.SUBSCRIBE: tinyurl.com/s2frxnfCheck out the technic elbow art tool at:VISIT: technicbrickpower.com#technicbrickpower, #legotechnic
Lego Technic Measuring Gearbox Efficiency Technic Brick Power 2021-11-06 | This video describes a method for measuring the efficiency of a gearbox using the Lego Technic Powered Up hub. Gearbox efficiency is defined as the ratio of the output power to the input power and here I show how to measure each of these values to allow you to calculate the overall efficiency. Gearbox losses are due to friction within gears and axles rubbing on the liftarms. By measuring these losses gearbox designs can be improved.Efficiency values are calculated and shown for several gearing combinations and for an automatic gearbox design.SUBSCRIBE: tinyurl.com/s2frxnfVISIT: technicbrickpower.com#technicbrickpower, #legotechnic
Lego Technic RC Forklift Technic Brick Power 2021-10-14 | Here I present a Lego Technic Remote Control Forklift model. The model uses articulated steering implemented with a Power Functions Servo motor, and is powered by a PF Large motor. The forks are raised and lowered with two PF medium motors driving worm gears which in turn drive via a 24 tooth clutch gear onto a sprocket wheel pulling up a track connecting the forks.The Forklift is demonstrated in action picking up boxes and flipping Lego Technic cars.#technicbrickpower, #legotechnicSUBSCRIBE: tinyurl.com/s2frxnfVISIT: technicbrickpower.com
Lego Technic Powered Up Tutorial 1 Technic Brick Power 2021-10-02 | This tutorial is for beginner Lego Technic Powered Up programmers. It teaches how to turn motors on and off, read and set their axle angles as well as axle calibration using the Powered Up app on the google store or apple store.Subscribe: tinyurl.com/s2frxnfVisit: technicbrickpower.com#legotechnic, #technicbrickpower
Lego Technic 100 Part Mercedes RC Car Technic Brick Power 2021-09-11 | Here is a challenge to build a fully functional Remote Controlled Lego Technic car using only 100 parts. This video shows the result.Visit my website for more Lego Technic tips and ideas: technicbrickpower.comSubscribe here: tinyurl.com/s2frxnf#technicbrickpower #legotechnic
Lego Technic Gearing Ratio Tool Update Technic Brick Power 2021-09-04 | This video presents updates to the Technic Brick Power Lego Technic Gearing Ratio Calculator tool (technicbrickpower.com/tools/gearing_ratio_calculator) specifically on underconstrained differential systems. These are systems in which the differentials are not fully constrained and therefore have 1 or more degrees of freedom within them. The tool has been updated to be able to analyze these lego technic gearing systems and show whether or not the gearing systems has underconstrained differentials and how many degrees of freedom they have. Additionally if multiple motors are connected such that there are no degrees of freedom then the speed of rotation of any driven component can be seen in terms of the weighted sum of the motor speeds.Visit: technicbrickpower.com#technicbrickpower #legotechnic
Lego Technic Powered Up 3 Speed Automatic Car Technic Brick Power 2021-08-13 | This video presents a new lego technic 3 speed automatic RC car. The gearbox uses the lego technic powered up hub and 3 motors to drive, steer and switch gears. The car's 3 speed automatic gearbox has 3 forward speeds with gear ratios 1:1, 3:5 and 1:5 and has been programmed using the Powered Up app on an iphone to automatically switch gears based on the torque measurement on the output axle of the powered up XL motor. The car is put to the test by driving into barriers and up a ramp to see the automatic gear switching in action.Check out my Gearing Ratio Calculator tool on technicbrickpower.comSUBSCRIBE: tinyurl.com/s2frxnf#technicbrickpower #legotechnic
Lego Technic Powered Up 3 Speed Automatic gearbox 2 Technic Brick Power 2021-07-24 | This video presents a revised version of an earlier Lego Technic Powered Up 3 speed automatic gearbox. The previous gearbox used a differential for torque measurement and used a powered up large motor to convert the differential rotation into a torque measurement.However as it turns out it is possible to simply use the main motor (Lego Techni powered up XL Motor) speed measurement to infer the torque on that motor simply through the inverse linear relationship between the motor speed and it's load or torque. This saves the entire torque measurement portion of the gearbox resulting in a more compact and robust design.The Lego Powered Up app was used on an iphone to program the automatic gear switching points using a calculation based on an electric motor power curve and the gearing ratio between the current gear and the gear being switched down to.The final lego technic 3 speed automatic gearbox using the Powered Up components is demonstrated at the end of the video.
Lego Technic Gearing Ratio Calculator Tool Technic Brick Power 2021-07-16 | Here I present my new Lego Technic Gearing Ratio Calculator tool. This tool allows you to upload your Lego Technic .ldr (Lego Draw) file and it will simulate the gearing system and visualize it as well as showing the gearing ratios relative to the input component.The tool can be accessed from my new website at technicbrickpower.comThe tool only shows and supports Lego Technic parts related to gearing systems such as axles, gears, differentials, driving rings and worm gears etc. All other parts are now shown.With this tool you can test and simulate your gearing creation before you go to the effort of building it and find out you have made a mistake!#technicbrickpower, #legotechnicSUBSCRIBE HERE: tinyurl.com/s2frxnf
Powered Up 3 Speed Automatic Gearbox Technic Brick Power 2021-06-21 | The lego technic Powered Up motors and functions have been used to create a lego technic 3 speed automatic gearbox. With the lego Powered Up functions you can accurately control motor speed and motor position, as well as being able to measure the angular position of a motor. These new possibilities have been used to create a three speed automatic gearbox. One motor is used to measure the torque at the output of the gearbox by detecting the rotation of an output differential; another motor is used to accurately set the position of an orange rotary catch controlling the switching between three forward gears, and finally one large powered up motor is used to drive the gearbox. The gearbox implements 3 forward speeds at gearing ratios of 1 to 1, 1 to 0.6 and 1 to 0.2 as well as one manual reverse gear.The Lego Powered Up app has been used to program the gearbox controller on an iphone. Thanks to @racingbrick (racingbrick.com) for providing a great guide to all of the available programming blocks.#technicbrickpower #legotechnicSUBSCRIBE HERE: tinyurl.com/s2frxnf
Lego Technic Omni Directional Vehicle v2.0 Technic Brick Power 2021-06-10 | This is an improved version of the Lego Technic Omni Directional RC Vehicle v1.0 (youtu.be/crj3kOiSmHg).Several improvements are made in this model mainly around the mode switching from driving forwards and backwards to rotating on the spot. In the previous model there was a lot of gear backlash causing one of the wheels to not fully rotate. This has been solved by reducing the number of gears to drive the wheel rotation and centralizing the motor driving axle.Additionally the Lego Technic PF servo motor has been replaced by a lego technic medium motor with additional down gearing to create more torque on the wheel rotation mechanism.SUBSCRIBE HERE: tinyurl.com/s2frxnfRELATED VIDEOS:Lego Technic Omni Directional RC Vehicle v1.0youtu.be/crj3kOiSmHgLego Technic Measuring Gear Backlashyoutu.be/RyvsA8jbtUs#technicbrickpower, #legotechnic
Lego Fantom Wallet Opener Technic Brick Power 2021-06-01 | The purpose of this Lego Technic project was to design a demonstration unit for the Fantom Wallet (fantomwallet.com) - a slimline wallet for holding credit cards.The lego technic mechanism opens and closes the Fantom Wallet uses a 4 state cycle based on an earlier design of a 4 state multi-function gearbox (youtu.be/AdWiViLtmdk) that switches between two outputs using the reverse directions of the motor for state changes. That gearbox drives one output at a time in either the forward or reverse direction which was exactly needed for the Fantom Wallet opener. One output drives the opening mechanism and the other output drives the closing mechanism.In the lego technic Fantom Wallet opener the states are driven by the orange rotary catch component and changed by one length 2 liftarm driving another and using a 90 degree stepper.#technicbrickpower #legotechnicSUBSCRIBE: tinyurl.com/s2frxnfcheck out my new Facebook page:facebook.com/Technic-Brick-Power-Lego-Technic-Page-101047828868556FANTOM WALLET: fantomwallet.comRELATED VIDEOS:Multifunction Gearbox: youtu.be/AdWiViLtmdk
Lego Technic Measuring Gear Backlash Technic Brick Power 2021-05-22 | Lego Technic gear backlash, also known as gear slop, gear play or simply gear lash is explained and demonstrated. The idea for this video came from a previous lego Technic design that exhibited problem causing gear backlash. The angle of lego technic gear backlash depends on the air gap and the number of teeth on the gear. It is measured for 16 tooth gears using a chain of thirty-one gears and measuring the cumulative angle and dividing by the number of gear meshes.SUBSCRIBE: tinyurl.com/s2frxnf#technicbrickpower #legotechnic
Lego Technic Omni Directional RC Vehicle v1.0 Technic Brick Power 2021-05-13 | This Lego Technic RC vehicle is modeled on the Roomba vacuum cleaner from iRobot. The Roomba can drive forwards, backwards and rotate on the spot. This RC lego technic model attempts to do the same but with four wheels instead of two, similar to a supermarket trolley. The vehicle can switch between driving mode where it can drive forwards or backwards using your remote control, or it can switch to rotation mode.The rotation mode is remotely activated by a lego technic power functions servo motor and it rotates each of the four wheels by 45 degrees to make a circular configuration. This allows the model to rotate on the spot in either a clockwise or anti-clockwise direction.SUBSCRIBE HERE: tinyurl.com/s2frxnf#technicbrickpower, #legotechnic
Lego Technic Single Motor Tank V2.0 Technic Brick Power 2021-05-01 | Here I present my second new and improved version of a lego technic tank that is driven by a single lego power functions motor. In this version the gearing mechanism has been optimized and far fewer gears are used to create the four different track direction combinations, namely both forward, both reverse, one forward & one reverse (turn left), and the opposite to turn right. Also the motor has been upgraded to an XL power functions motor instead of the large power functions motor. This gives an extra 0.5 watts of peak power.The lego RC tank can be controlled remotely using a single remote channel and driven forwards, backwards, and steered left and right. These functions are implemented by exploiting the direction of rotation of the motor to either drive the tank or select one the four track functions.This is done by a swinging liftarm with a gear that connects the motor output to one of two separate axles - one for driving the lego tank and one for selecting the track functions.The track functions are built using 2 orange rotary catches to switch a lego gearbox design that allows both tracks to be selected to drive forwards or backwards or to drive in either of the two opposite directions for steering.The track function selector uses a 90 degree stepper and a knobbed wheel to drive the rotary catches.The lego technic tank has an indicator on top to show which function has been selected.#technicbrickpower, #legotechicSUBSCRIBE: tinyurl.com/s2frxnfRELATED VIDEOS:Single Motor Tank: youtu.be/8rSQJKxv-e0Lego Technic Multi Function Gearbox: youtu.be/AdWiViLtmdkLego Technic Dual Function Gearbox: youtu.be/U2ftXWO2yrE
Lego Technic Gear Meshing Angle Tutorial - how to calculate gear angles Technic Brick Power 2021-04-13 | This video presents a Lego Technic tutorial for calculating the gear angle for the correct meshing of the lego gears within a lego design program such as bricklink studio. Three lego gear meshing examples are working through - the first one being a straightforward rotation of the second gear in order to mesh with the first gear which is set to zero degrees.In the second example the first gear as an arbitrary angle of rotation and the correct angle calculation of the second lego gear is demonstrated by using the angle combined with the gearing ratio between the two gears.Each of the first two examples assumed the relative position of the second lego gear is at a multiple of 90 degrees. In the third example the position of the 2nd gear is at an angle relative to the first and again the correct meshing angle is calculated.All of the examples are working through on the bricklink studio lego designer program. The examples are applicable to other programs such as lego's LDD design program.SUBSCRIBE HERE: tinyurl.com/s2frxnfRELATED VIDEOS: How to mesh any two Lego gears on a regular grid!youtu.be/4gpTkVmYox4#technicbrickpower #legotechnic
Lego Technic Single Motor Tank Technic Brick Power 2021-04-01 | Here I present a lego technic tank driven by a single lego power functions motor. The lego RC tank can be controlled remotely using a single remote channel and driven forwards, backwards, and steered left and right. These functions are implemented by using a single large PF motor and exploiting the direction of rotation of the motor to either drive the tank or select one the four track functions.This is done by a swinging liftarm with a gear that connects the motor output to one of two separate axles - one for driving the lego tank and one for selecting the track functions.The track functions are built using 2 orange rotary catches to switch a lego gearbox design that allows both tracks to be selected to drive forwards or backwards or to drive in either of the two opposite directions for steering.The track function selector uses a 90 degree stepper and a knobbed wheel to drive the rotary catches.The lego technic tank has an indicator on top to show which function has been selected.#technicbrickpower, #legotechicSUBSCRIBE: tinyurl.com/s2frxnfRELATED VIDEOS:Lego Technic Multi Function Gearbox: youtu.be/AdWiViLtmdkLego Technic Dual Function Gearbox: youtu.be/U2ftXWO2yrE
Lego Technic Multi Function Gearbox with Build Instructions Technic Brick Power 2021-03-20 | This lego technic multi function gearbox implements two separate functions using just a single motor. It implements the two functions by exploiting the direction of rotation of the motor and implementing one function for the forward direction and a function selector in the reverse direction. The reverse selector can be used to select between between driving one of the two outputs in either the forward or reverse direction.This means you can build a lego technic remote controlled car or device that has two functions that can be remotely controlled with just 1 motor and just 1 channel of your remote transmitter and receiver combination.BUILD INSTRUCTIONS: rebrickable.com/mocs/MOC-74906/TechnicBrickPower/multi-function-gearbox-single-motorRELATED VIDEO: Dual function gearbox youtu.be/U2ftXWO2yrESUBSCRIBE: tinyurl.com/s2frxnf#technicbrickpower, #legotechnic
Lego Technic Binary Expansion of Pi Technic Brick Power 2021-03-13 | This Pi Day video demonstrates how to approximate a gearing ratio of Pi by representing Pi as a binary number and using differentials arranged in a chain formation to create the binary representation. Each differential implements 1 binary digit. If the binary digit is zero the differential can be replaced by a gearing ratio of a half to reduce the number of differentials required. This model has 23 binary digits and approximates Pi to 7 significant figures beating last year's model which approximated Pi to 6 significant figures using the continued fraction 355/113 and implemented using a differential pair. See the video youtu.be/fGg11gqZy8M.This model has 202 gears and is almost 90cm long! The entire model is driven by a medium sized PF motor.If you are interested in learning how to create a gearing ratio of N/P using differentials then check out this video youtu.be/ORvnzx36j2g#technicbrickpower, #legotechnic
Lego Technic Dual Function Gearbox Technic Brick Power 2021-03-03 | This gearbox solves the problem of needing three lego technic motors to remotely control a car with 3 functions namely driving, steering and gear changing capability. The lego gearbox implements two functions at once by exploiting the direction of rotation of the driving motor and implementing one function (driving) for the forward direction and gear changing in the reverse direction.This means you can build a lego technic remote controlled car that can drive, steer and change gears with just two motors, one remote receiver and one remote control unit.This gearbox implements four gears - 3 forward and one reverse. The gearing ratios of the forward gears are 1:1, 3:5 and 1:3. The reverse gear is 9:25.SUBSCRIBE: tinyurl.com/s2frxnfBUILD INSTRUCTIONS: rebrickable.com/mocs/MOC-68850/TechnicBrickPower/dual-function-gearbox#technicbrickpower, #legotechnic
Lego Technic Two Degrees of Freedom 2 speed Automatic Gearbox Technic Brick Power 2021-02-20 | This lego technic 2 speed automatic gearbox implements it's second gear by using a two degrees of freedom configuration and blocking and unblocking the lower gearing ratio path by using a switch and rotary catch. The rotary catch is driven by a torque detector and once enough load is detected at the output it is rotated 90 degrees to unblock the low gearing ratio path. Upon the path being unblocked it becomes the path of least resistance and the output gearing ratio is reduced to give a higher output torque.Alternative lower gearing ratios can be implemented in this lego technic 2 speed automatic gearbox by changing out the lower gearing path gears.This 2 speed automatic gearbox operates in a bi-directional manner - meaning the input motor can rotate either way and the automatic gearbox still functions.BUILD INSTRUCTIONS: rebrickable.com/mocs/MOC-70177/TechnicBrickPower/two-degrees-of-freedom-2-speed-automatic-gearboxSUBSCRIBE: tinyurl.com/s2frxnf#technicbrickpower, #legotechnicRELATED VIDEOS: "Lego Technic 3 Speed Automatic Gearbox"youtu.be/TUCKzPP3HQY"Lego Technic Two Degrees of Freedom Differential Analysis"youtu.be/9Fyp2bzCfWk
Lego Technic Servo Driven 3 Speed Automatic Gearbox Technic Brick Power 2021-02-12 | A lego technic 3 speed automatic gearbox is presented using a lego technic power function servo motor to drive the gear change mechanism. The servo motor is driven by a lego electric switch which in turn is driven by a torque detector using a differential at the output.The technic automatic gearbox will switch to a lower gears automatically as load is detected on the output of the gearbox allowing it to generate more torque to overcome the load.The 3 speed automatic gearbox implements gearing ratios of 4 to 3, 3 to 4 and 1 to 2.SUBSCRIBE: tinyurl.com/s2frxnf#technicbrickpower #legotechnic
Lego Ferrari 488 GTE Manual 8 Speed Gearbox Technic Brick Power 2021-01-29 | This video shows the design and construction of an 8 speed manual gearbox inspired by the Lego Technic Ferrari 488 GTE model that has come out in 2021. The lego technic set is called set #42125 Ferrari 488 GTE "AF Corse #51". The gearbox gearing ratios closely approximate the gearing ratios of the real Ferrari 488 GTE gearbox except that it implements a lego technic manual 8 speed gearbox instead of an automatic 8 speed gearbox. This lego gearbox design implements the gearing ratios of 7 forward gears and one reverse gear matching the gearing ratios of the Ferrari 488 gearbox.The design process to create the correct gearing ratio approximation is shown from paper design to actual implementation. The final model is demonstrated by driving an 8 cylinder lego technic engine using a large PF (Power Functions) motor and switching between all of the 8 possible gears.This gearbox does not fit into the Lego Technic Ferrari 488 GTE model #42125.BUILD INSTRUCTIONS: rebrickable.com/mocs/MOC-79482/TechnicBrickPower/lego-ferrari-488-gte-manual-8-speed-gearbox#techinicbrickpower, #legotechnicSUBSCRIBE: tinyurl.com/s2frxnf
Lego Technic RC 3 SPEED CAR - change gears, drive and steer using remote control Technic Brick Power 2021-01-19 | An improved version of a lego technic RC 3 speed gearbox is implemented into a remote control lego car. This video shows three main improvements over the previous gearbox design. The first is an improvement is to replace the 90 degree bugatti stepper with a PF servo motor reducing the gearbox complexity. The 2nd improvement is to use a gear rack to replace the liftarm lever mechanism for converting angle to linear displacements. And finally the third improvement to change from using a 2 lego unit axle offset to a 2+1 offset to allow bevel gears to mesh with regular gears for the gear switch mechanism, and thereby eliminating one row of gears.The final gearbox is implemented into a lego technic 3 speed remote controlled car that can be driven backward and forwards and steered remotely, as well as remote gear changing between 3 different speeds.#technicbrikpower, #legotechnicSUBSCRIBE: tinyurl.com/s2frxnf
Lego Technic RC 3 Speed Manual Gearbox Technic Brick Power 2021-01-11 | A Lego Technic 3 speed remote controlled gearbox is presented with the design process explained. The lego RC 3 speed gearbox allows you to change gears up and down using a power functions remote control. The 3 speed gearbox implements the gear changing mechanism using two parallel axles each with gears arranged in such a way that shifting one of the axles to one of three possible positions meshes the gears with 3 different gearing ratios. The gearing ratios implemented are 3:5, 1:1 and 5:3. The gear shifting axle is controlled by a lever mechanism driven by the 4 state stepper from the lego technic bugatti chiron set. This mechanism in turn is driven by a medium power functions motor activated by the remote control.The main driving axle is driven by a lego technic large PF motor.SUBSCRIBE HERE: tinyurl.com/s2frxnf BUILD INSTRUCTIONS: rebrickable.com/mocs/MOC-63531/TechnicBrickPower/rc-three-speed-stepper-gearbox#technicbrickpower, #legotechnic
Lego Technic 2 Speed Automatic Gearbox with Booster Motor Technic Brick Power 2020-12-23 | A lego technic 2 speed automatic gearbox is presented. The point of difference of this automatic 2 speed gearbox is a secondary booster motor is activated once the torque detector senses a large enough torque on the output of the automatic gearbox.The second motor is turned on by a pole reversing switch component driven by the torque detector differential which simultaneously drives an orange rotary catch component. The rotary catch not only engages a secondary gearing path that reduces the overall gearing ratio but also engages the booster motor to provide more power at the output as required by the higher load conditions.The gearbox is demonstrated in action by using a configurable loading mechanism that uses 10 lego clutch gears to provide ten levels of torque loading to simulate different loading situations.SUBSCRIBE HERE: tinyurl.com/s2frxnf#technicbrickpower, #legotechnic
Lego Technic 2 Speed Auto Car Ramp Challenge - Part 2 Technic Brick Power 2020-12-10 | A lego technic 2 speed automatic gearbox is put to the test by incorporating it into a lego 2 speed automatic car. This lego 2 speed automatic gearbox implements a number of design principles aimed at improving the gearbox performance - namely of placing the torque detector on a separate path to the main gearing power path to reduce torque and power losses in the lego gearbox, and using gear disengagement to switch gears instead of gear engagement.A simple derivation is presented of the physics involved in driving up a ramp in order to determine the amount of additional torque required at the motor output to be able to overcome the gravity and the corresponding potential energy.The torque of the large lego power function motor is measured by measuring the output axle speed using a laser tachometer and relating that to the linear torque/speed relationship of the motor. These measurements are demonstrated for the car without any loading and with simple horizontal motion.Finally the car is put to the test by attempting to drive up a 40 degree ramp.SUPPORT AND SUBSCRIBE: tinyurl.com/s2frxnf#technicbrickpower, #legotechnic
Lego Technic 2 Speed Auto Gearbox - a new hope - with build instructions Technic Brick Power 2020-11-28 | This Lego technic 2 speed automatic gearbox design uses a worm gear for torque detection and gear switching combined. Previous Lego 2 speed automatic gearboxes have used a Lego differential for torque detection to drive an orange rotary catch to switch gears using a switch component.The worm gear switches gears by disengaging one path to the input differential, thereby reducing the overall gearing ratio. In this 2 speed gearbox design the output gearing ratio is halved when switching from gear 1 to gear 2.By disengaging the 2nd path, the efficiency of the lower gear is improved due to the simplification of the gear train reducing the friction and power losses in that path.The overall power of the Lego technic automatic gearbox is demonstrated by testing it against a ten level torque generation device, as well as using a rubber band pulling instrument to measure the output pulling force for both gears.BUILD INSTRUCTIONS: rebrickable.com/mocs/MOC-67378/TechnicBrickPower/2-speed-automatic-gearboxSUBSCRIBE AND SUPPORT: tinyurl.com/s2frxnf#technicbrickpower, #legotechnic
Lego Technic Applied Gearbox Theory Improved Technic Brick Power 2020-11-20 | This Lego Technic video demonstrates an improved design of a Lego technic 2 speed automatic gearbox based on a theoretical approach. Typically a Lego automatic gearbox consists of two stages namely a gear selector and a torque detector. In this video, both of these components are improved upon. The gear selector gear count has been reduced from 13 gears down to just 9 gears and a torque improvement of 40% is demonstrated via pulling on rubber bands and measuring the force using luggage scales.The torque detector is analyzed mathematically and the equations determining it's gear ratio behaviour are presented.Finally the overall improved Lego technic automatic gearbox is tested and demonstrated to have a powerful second gear.SUPPORT AND SUBSCRIBE: tinyurl.com/s2frxnf#technicbrickpower, #legotechnic
Lego Technic Gearbox Theory Applied - how to apply theory to help design 2 speed automatic gearboxes Technic Brick Power 2020-11-10 | This video applies lego technic gearbox, torque, and gearing ratio theory to design a prototype lego 2 speed automatic gearbox. First I describe the main components of an automatic gearbox, namely a gearing ratio selector and a torque detector. The ideal gear switch over torque point is described in terms of the PF motor torque and speed operating point, as well as the ideal gear switching ratio for the 2nd gear of the automatic gearbox.A technique for creating the 2nd gear is described by either adding to a differential by engaging a gear, or by subtracting by disengaging the gear. Issues around torque friction making it difficult to disengage a gear are mitigated by speeding up the gear switching axle to reduce torque.A lego technic torque detection method is shown using a differential for torque detection and driving a rotary catch back to the gear selector to change gears. A strategy is shown to reduce the torque and power loss due to the lego torque detector by placing it on a secondary path from the main power path.Finally an actual implementation of a lego technic 2 speed automatic gearbox is demonstrated and tested using a configurable torque generation mechanism using a series of clutch gears to create friction.PLEASE SUPPORT & SUBSCRIBE: tinyurl.com/s2frxnf#technicbrickpower, #legotechnic
Lego Technic torque in practice - how to work with torque in automatic gearbox design Technic Brick Power 2020-10-29 | In this video I present a ten level Lego Technic torque creation gadget for testing lego power function motors and automatic gear switching mechanisms. The effect of torque on a large lego PF motor is tested against the theoretical power curve to compare the optimal gear switching point in practice with the theory.Also a gear switching torque detector is fine tuned using the torque creation gadget by using two power transfer paths two transfer power from input to the output.Finally the effect of torque on a rotary catch gear switching mechanism is demonstrated and shown that high speed and low torque is preferable to low speed and high torque for disengaging the gears.SUPPORT & SUBSCRIBE: tinyurl.com/s2frxnf#technicbrickpower, #legotechnic
Lego Technic Optimal Gear Switching Ratios Technic Brick Power 2020-10-17 | This video presents the relationship between lego technic motor torque and speed and shows there is an peak power for each electric motor.The peak power is calculated and a formula presented relating the power operating point as a percentage of peak power. From this an operational power range band is defined based on maintaining a power efficiency of at least E percent.Based on this, optimal switching points relative to the motor torque are derived and the correct gear switching ratio determined. These are presented as formulas and graphs.The peak torque and power points are shown for Lego technic PF medium motors, Lego Techinc PF Large Motors and Lego Technic PF XL Motors. SUPPORT & SUBSCRIBE: tinyurl.com/s2frxnf#technicbrickpower, #legotechnic
Lego Technic torque and power for 2 speed automatic gearbox design Technic Brick Power 2020-10-10 | This video explores the torque and power of lego technic 2 speed automatic gearbox designs. The torque and peak power of the lego large power functions motor is mathematically calculated and shown to give maximum power output at about 220 RPM.A two path power transfer system using a differential is analysed and the power ratio between the paths is mathematically derived. This shows that the torque detector for a lego automatic gearbox can be placed on the path with the least power to reduce the overall system inefficiency.Torque experiments show that the torque and power theory agrees in practice and will help to design a lego technic 2 speed automatic gearbox in the future.SUBSCRIBE: tinyurl.com/s2frxnf#technicbrickpower, #legotechnic
Lego 2 speed automatic car. Part 1 Technic Brick Power 2020-10-03 | This video explores the use of the lego technic "smoothly switching 2 speed automatic gearbox" inside of a test car to see how well it works to climb up a ramp. The gearing ratio of the 2nd gear of the 2 speed automatic gearbox can be set using a manual 4 speed gearbox to choose between gearing ratios relative to the first speed of 0.865, 0.775, 0.595 or 0.325.The 2 speed automatic gearbox car is tested to see how well it drives up a steep hill, and is also compared to a lego manual gearbox version of the car to see the performance difference. Finally the construction of the 2nd speed implementation using a differential is compared to a basic construction for the same gearing ratio by measuring their torque output by pulling a set of rubber bands and measuring the overall force generated.SUPPORT BY SUBSCRIBING: tinyurl.com/s2frxnf#technicbrickpower, #legotechnic.
