Uploaded August 2025 | Updated September 2026, 2 weeks ago
This video is part of the "Introduction to Electronics: Filters" course, created to help beginners understand the principles and applications of electronic filters through hands-on projects. You will explore essential topics like RC and RL filters, cutoff frequency, phase shift, Bode plots, and how filters are used in audio, sensors, and power supplies. Learn more about the full course here: techexplorations.com/so/introduction-to-electronics-filters
In this video, we examine how an RL low-pass filter works to pass low-frequency signals while attenuating high-frequency signals. You will learn how a resistor and inductor form a voltage divider that behaves differently as signal frequency changes. At low frequencies, the inductor presents low impedance, and the output remains high. At high frequencies, the inductor’s impedance increases, reducing the output amplitude. We explain the filter’s transfer function and introduce the cutoff frequency using the formula fc = R / (2πL). A Python simulation is used to plot the filter’s frequency response, visually demonstrating the gradual roll-off above the cutoff point.
If you enjoyed this video, please like and subscribe to the Tech Explorations channel, and turn on notifications for more on electronics and programming.
Want the full course? Use code "youtube" for 25 percent off at techexplorations.com/so/introduction-to-electronics-filters
#RLLowPassFilter #CutoffFrequency #TransferFunction #SignalProcessing #PythonSimulation #TechExplorations #ElectronicsEducation #OnlineLearning #Inductors
This video is part of the "Introduction to Electronics: Filters" course, created to help beginners understand the principles and applications of electronic filters through hands-on projects. You will explore essential topics like RC and RL filters, cutoff frequency, phase shift, Bode plots, and how filters are used in audio, sensors, and power supplies. Learn more about the full course here: techexplorations.com/so/introduction-to-electronics-filters
In this video, we examine how an RL low-pass filter works to pass low-frequency signals while attenuating high-frequency signals. You will learn how a resistor and inductor form a voltage divider that behaves differently as signal frequency changes. At low frequencies, the inductor presents low impedance, and the output remains high. At high frequencies, the inductor’s impedance increases, reducing the output amplitude. We explain the filter’s transfer function and introduce the cutoff frequency using the formula fc = R / (2πL). A Python simulation is used to plot the filter’s frequency response, visually demonstrating the gradual roll-off above the cutoff point.
If you enjoyed this video, please like and subscribe to the Tech Explorations channel, and turn on notifications for more on electronics and programming.
Want the full course? Use code "youtube" for 25 percent off at techexplorations.com/so/introduction-to-electronics-filters
#RLLowPassFilter #CutoffFrequency #TransferFunction #SignalProcessing #PythonSimulation #TechExplorations #ElectronicsEducation #OnlineLearning #Inductors
![[160] Arduino Getting Started: Digital input and button](https://i.ytimg.com/vi/RK8kM8LW2Oo/mqdefault.jpg "[160] Arduino Getting Started: Digital input and button
This tutorial introduces how to integrate a push button into your Arduino projects to control an LED. Using a digital input pin, youll learn to read the state of the button and use its status to turn an LED on and off. This project builds on our previous tutorial by adding a push button and demonstrating how to set up and code for interactive elements. Through the demonstration, youll understand how to handle button states and debouncing, enhancing the interactive capabilities of your Arduino projects.
This series is possible thanks to the kind support of Sunfounder, an online store that sells high-quality hardware and kits for Makers. Visit Sunfounder at https://sunfounder.com.
In this series, I use the SunFounder 3 in 1 Ultimate Starter Kit with Original Arduino Uno R4 Minima, including high-quality sensors, actuators, power supplies, and Original Arduino Uno R4 Minima for diverse projects and skill-building. Get it (affiliate link): https://www.sunfounder.com/collections/arduino-kits/products/sunfounder-3-in-1-ultimate-starter-kit-with-original-arduino-uno-r4-minima?ref=bXS65iah
Video Description with Timestamps
00:00 - Introduction to adding a push button to Arduino projects.
00:10 - Overview of necessary components: push button, LED, resistor, and jumper wires.
00:17 - Step-by-step guide to placing and wiring the push button on the breadboard.
00:30 - Explanation of using a pull-down resistor for stable low signals.
00:48 - Beginning the Arduino IDE code setup for reading the button state.
01:00 - Walkthrough of the Arduino sketch for controlling an LED based on button input.
01:34 - Details on initializing pin modes and setting up serial communication.
02:02 - Introduction to the loop function and how it reads the button state.
02:31 - Explanation of conditional blocks and actions based on button state.
02:52 - Discussion on debouncing the button to prevent rapid on/off states.
03:16 - Instructions for uploading the code and testing the buttons functionality.
03:35 - Exploration of various applications for buttons in Arduino projects.
04:00 - Encouragement to like, subscribe, and engage with the channel for more tutorials.")
![[250] Arduino Getting Started: Precise motion with the servo motor](https://i.ytimg.com/vi/U48qhnxEWdk/mqdefault.jpg "[250] Arduino Getting Started: Precise motion with the servo motor
In this tutorial, we demonstrate how to achieve precise movement with a popular 9-gram micro servo SG90 using an Arduino Uno. This tutorial is perfect for beginners who want to integrate servo motors into their projects, whether its for robotics, automation, or art installations.
This series is possible thanks to the kind support of Sunfounder, an online store that sells high-quality hardware and kits for Makers. Visit Sunfounder at https://sunfounder.com.
In this series, I use the SunFounder 3 in 1 Ultimate Starter Kit with Original Arduino Uno R4 Minima, including high-quality sensors, actuators, power supplies, and Original Arduino Uno R4 Minima for diverse projects and skill-building. Get it (affiliate link): https://www.sunfounder.com/collections/arduino-kits/products/sunfounder-3-in-1-ultimate-starter-kit-with-original-arduino-uno-r4-minima?ref=bXS65iah
⏰ Timestamps
00:00 - 00:12: Introduction to SG90 Servo Motor 🔍
00:12 - 00:26: What is a Servo Motor? 🤔
00:26 - 00:52: Understanding Servo Motor Wiring 🧰
00:52 - 01:17: Connecting SG90 to Arduino 🔌
01:17 - 01:31: Using PWM to Control Servo 📡
01:31 - 01:42: Arduino IDE and Code Overview 💻
01:42 - 01:55: Including the Servo Library 📂
01:55 - 02:07: Attaching Servo to Pin 9 📍
02:07 - 02:32: Loop Function and Servo Movement 🔁
02:32 - 02:39: Delays for Smooth Movement ⏳
02:39 - 02:46: Uploading and Testing the Code 🚀
02:46 - 02:59: Observing Servo in Action 👀
02:59 - 03:09: Summary of Servo Motor Applications 🎓
03:09 - 03:17: Invitation to Subscribe 📢
📚 Main Learning Objectives
Understand the basics of servo motors and their uses.
Learn how to wire an SG90 servo motor to an Arduino.
Use the Servo library to control a servo motor.
Write Arduino code to make the servo sweep back and forth.
Achieve precise angular movements with the servo motor.
Experiment with different angles and movements.
📢 Invitation to Subscribe
If you found this tutorial helpful, please give it a thumbs up 👍 and consider subscribing to our channel for more tutorials like this one. Your support motivates us to keep creating valuable content. Thanks for watching, and see you next time! 🚀")
