Uploaded April 2021 | Updated September 2026, 3 weeks ago
► $2 for 1-4 Layer PCBs, Get SMT Coupons: jlcpcb.com/DYE
Hi, this is probably the smallest LM3915 Vu-Meter you have ever seen on YouTube (without SMD) with a PCB Size of 28*28mm! It is designed to be connected to a pre-amplified audio source or directly to the amplified outputs of the amplifier. This circuit must be powered with 9-12V DC,
After trying the excellent service offered by JLCPCB I recommend it, the quality of the PCB is high, customer service is always available and professional, the time of realization is short and the delivery of PCBs is by express courier. JLCPCB is a great place to get hight quality custom circuit boards at an extremely low price, you can buy 5 PCB Boards (Any Color) for 2$ !!!
Components:
- 1x LM3915 IC
- 1x 10 LED Bargraph
- 1x 18 PIN Dip
- 1x 1uF 25/50/100V Electrolytic Capacitor
- 2x 2.7KΩ Resistors
- 1x100KΩ Resistor
- 1x 1N4007 Diode
- 2x PIN for Dot/Bar Mode
- 3x PIN for Vcc | GND | Sig
- PCB: drive.google.com/file/d/1XcO8OrXTiZGpRT3iv5fnueobhHlnWvk-/view?usp=sharing
*Don't use my PCB for profit or sponsored videos.
✅ Subscribe to my YouTube channel It's FREE!
Chapters:
0:00 - Intro
0:45 - Circuit Diagram
1:48 - JLCPCB Upload
2:15 - Unboxing
2:52 - Assembly
5:10 - Test
5:36 - Music Test
6:44 - End
■▬▬▬▬▬ LINK & Support ▬▬▬▬▬■
✅ YouTube: youtube.com/c/Stefano91ste
✅ Instagram: instagram.com/Stefano91ste
✅ Pinterest: https://www.pinterest.it/Stefano91ste
✅ My STORE: youtube.com/c/Stefano91ste/store
Watch another video =)
● Music Keyboard: youtu.be/ajtR6eDOaQI
● LED Water Level: youtu.be/n9GB0nfwG8s
● Police Light: youtu.be/PtmEqcRbu4w
● Vu-Meter Stereo: youtu.be/l8oUQpGAOCw
● Traffic Light: youtu.be/6iRjZMHVvhs
● Vu-Meter 40 LED: youtu.be/oWB2faToGAA
● Voltage Detector: youtu.be/yRWRsSASQTc
WARNING: This video is only for demonstration. I don't take any responsibility.
#LM3915 #VuMeter #diyprojects
► $2 for 1-4 Layer PCBs, Get SMT Coupons: jlcpcb.com/DYE
Hi, this is probably the smallest LM3915 Vu-Meter you have ever seen on YouTube (without SMD) with a PCB Size of 28*28mm! It is designed to be connected to a pre-amplified audio source or directly to the amplified outputs of the amplifier. This circuit must be powered with 9-12V DC,
After trying the excellent service offered by JLCPCB I recommend it, the quality of the PCB is high, customer service is always available and professional, the time of realization is short and the delivery of PCBs is by express courier. JLCPCB is a great place to get hight quality custom circuit boards at an extremely low price, you can buy 5 PCB Boards (Any Color) for 2$ !!!
Components:
- 1x LM3915 IC
- 1x 10 LED Bargraph
- 1x 18 PIN Dip
- 1x 1uF 25/50/100V Electrolytic Capacitor
- 2x 2.7KΩ Resistors
- 1x100KΩ Resistor
- 1x 1N4007 Diode
- 2x PIN for Dot/Bar Mode
- 3x PIN for Vcc | GND | Sig
- PCB: drive.google.com/file/d/1XcO8OrXTiZGpRT3iv5fnueobhHlnWvk-/view?usp=sharing
*Don't use my PCB for profit or sponsored videos.
✅ Subscribe to my YouTube channel It's FREE!
Chapters:
0:00 - Intro
0:45 - Circuit Diagram
1:48 - JLCPCB Upload
2:15 - Unboxing
2:52 - Assembly
5:10 - Test
5:36 - Music Test
6:44 - End
■▬▬▬▬▬ LINK & Support ▬▬▬▬▬■
✅ YouTube: youtube.com/c/Stefano91ste
✅ Instagram: instagram.com/Stefano91ste
✅ Pinterest: https://www.pinterest.it/Stefano91ste
✅ My STORE: youtube.com/c/Stefano91ste/store
Watch another video =)
● Music Keyboard: youtu.be/ajtR6eDOaQI
● LED Water Level: youtu.be/n9GB0nfwG8s
● Police Light: youtu.be/PtmEqcRbu4w
● Vu-Meter Stereo: youtu.be/l8oUQpGAOCw
● Traffic Light: youtu.be/6iRjZMHVvhs
● Vu-Meter 40 LED: youtu.be/oWB2faToGAA
● Voltage Detector: youtu.be/yRWRsSASQTc
WARNING: This video is only for demonstration. I don't take any responsibility.
#LM3915 #VuMeter #diyprojects
![Easy Traffic Light circuit with Transistor BC547🚦
in this video we are going to make a very simple traffic light circuit, we used three transistors BC547 and other simple composts..
This circuit will flash three LEDs, You can change time interval with change the capacitors. More power capacitor decrease speed and less power capacitor increases the speeds. You can also connect variable resistor on the place of 100K resistor to adjust the time interval as want. In fact, as you can see in the diagram, one of the three capacitors is 100uF while the other two are 220uF. The 100uF capacitor allows yellow LED to stay on for less time than the other two LEDs..
Components List:
- 3x 5mm LED [ https://bit.ly/2UzRDgR ]
- 5x BC547 NPN Transistors [ https://bit.ly/3cJtc9u ]
- 3x 2.7K Resistors [ https://bit.ly/2ytgn3e ]
- 3x 100K Resistors [ https://bit.ly/2ytgn3e ]
- 2x 220uF Electrolytic Capacitors [ https://bit.ly/2WlIgCt ]
- 1x 100uF Electrolytic Capacitor [ https://bit.ly/2WlIgCt ]
- 1x Bradboard [ https://bit.ly/3b2zv7k ]
- Power this circuit with 9-12V DC
- Electric Diagram at: 1:45
*use 25/50/100V Electrolytic Capacitor
Chapters:
0:00 - Intro
1:08 - Test
1:45 - Circuit Diagram
■▬▬▬▬▬ LINK & Support ▬▬▬▬▬■
Watch another video =)
● Music Keyboard: https://youtu.be/ajtR6eDOaQI
● Water Level indicator: https://youtu.be/n9GB0nfwG8s
● Police Light: https://youtu.be/kG2LQmEtqZo
● Electric Field Detector: https://youtu.be/4nS8xujHZT8
● Vu-Meter Stereo: https://youtu.be/l8oUQpGAOCw
● Traffic Light: https://youtu.be/6iRjZMHVvhs
● Vu-Meter 40 LED: https://youtu.be/oWB2faToGAA
● Voltage Detector: https://youtu.be/yRWRsSASQTc
● NE555 Signal Generator: https://youtu.be/iYP3Db3jyOQ
Follow me ♥
- YouTube: https://www.youtube.com/c/Stefano91ste
- Instagram: https://www.instagram.com/Stefano91ste
- Pinterest: https://www.pinterest.it/Stefano91ste
● If youd like to support the channel:
- Like, Subscribe, Comment and Share :)
- My STORE: https://www.youtube.com/c/Stefano91ste/store
■ Do you want to Make a PCB?
Look this: https://youtu.be/l8oUQpGAOCw
WARNING: This video is only for demonstration. I dont take any responsibility for damage to things, people and animals.
#Electronic #Easy #Projects Easy Traffic Light circuit with Transistor BC547🚦](https://i.ytimg.com/vi/kOlmGUwj_dk/mqdefault.jpg)






![DIY Geiger Counter with Test ☢️
I built a Geiger Counter Station and tested it with REAL Radium! This Counter has been designed to be active h24, if necessary and it can be powered with a small 12V battery. It has a visual alarm (LED) and sound alarm (Buzzer) detects radiation γ and β in range of 20mR/h ~ 120mR/h of gamma rays and 100 ~ 1800 off variables/points/cm 2 of the soft beta ray.
● What is a Geiger Counter?
A Geiger counter is an instrument used for detecting and measuring ionizing radiation, it is widely used in applications such as radiation dosimetry, radiological protection, experimental physics, and the nuclear industry. What you see in this video is not a portable device but to be kept hanging in the Laboratory.
● Natural Radioactive Background:
In the absence of radioactive material it is possible that the geiger counter emits small sounds, this detection you hear is the normal natural radioactive background. The natural background is due to the sun, stars and cosmic background noise. is harmless and is the only safe source of radioactivity to test your instrument.. But in this video I will something dangerous, Ill try it with some RADIUM!
● About my Nuclear TEST ☢️
For the test I will use an old Clock as a radioactive sample, this is possible because the brown substance on clock hands and next to the hours is, unfortunately, Radium Paint. Who decided to use radium in the paint, created a beautiful but lethal substance... in the past it wasnt known that radioactivity was toxic. What I did in this video is very dangerous, dont do it too, and if you should have one of these clocks in your home (table or wrist) please dispose of it as soon as possible according to the laws of your country.
● Radium & Paint with Radium:
Radium is a chemical element with the symbol Ra and atomic number 88 and it is a radioactive element! Radium was discovered by Marie and Pierre Curie in 1898 - In fact the word Radioactivity derives from the name of this element. Paints containing Radium were used from years 1920 to 1960.. and this because it emitted light and no one was aware of their toxicity.
● Radium (Ra) Chemical Properties:
Atomic number: 88
Atomic mass: 226.0254 g.mol -1
Electronegativity according to Pauling: 0.9
Density: 5 g.cm-3 at 20°C
Melting point: 700 °C
Boiling point: 1140 °C
Vanderwaals radius: 0.230 nm
Ionic radius: unknown
Isotopes: 6
Electronic shell: [ Rn ] 7s2
Energy of first ionisation: 509.1 kJ.mol -1
Energy of second ionisation: 975 kJ.mol -1
Half Life: 1602 years
Discovered by Pierre and Marie Curie in 1898
● Components & More:
Geiger Module: https://www.banggood.com/custlink/DmvDo7Oq5z
PLA Case: https://www.thingiverse.com/thing:3766612
PLA Handle: https://www.thingiverse.com/thing:4643658
My CNC: https://youtu.be/qPVDsh93Zi8
● Feature of this Geiger Counter Station:
5V power supply
Sound and Light alarm
Ardunio compatible
supports most of the Geiger tube
380~550V operating voltage for Geiger tube
Support computer data acquisition
γRay 20mR/h~120mR/h (GAMMA)
βRay in range 100~1800 (BETA)
Beta and Gamma radiation detetion.
12V Battery (A23 – A27) for short uses only.
220/12V Transformer for H24 use
Protection with glass fuse
● Other Video about this Geiger Module:
Geiger Counter Unboxing: https://youtu.be/6KYKToTKO9E
Portable Geiger Counter: https://youtu.be/E-9_hCpqNaY
● Music Credits:
Fast and Run - Nico Staf (Assembly)
Enigmatic - Bensound (Radium Explanation)
● Chapters:
0:00 - Intro
0:08 - Explanation
0:47 - Construction
1:18 - Geiger Module Diagram
1:22 - Construction
1:31 - 5V Stabilizer Diagram
1:34 - Construction
3:27 - Final Result
3:38 - Main Circuit Diagram
3:41 - About Nuclear Test
4:02 - What is Radium (Ra) 88?
4:25 - NUCLEAR TEST
5:37 - Examples of Radium Clocks
6:15 - END
■▬▬▬▬▬ LINK & Support ▬▬▬▬▬■
✅ YouTube: https://www.youtube.com/c/Stefano91ste
✅ Instagram: https://www.instagram.com/Stefano91ste
✅ Pinterest: https://www.pinterest.it/Stefano91ste
✅ My STORE: https://www.youtube.com/c/Stefano91ste/store
Watch another video =)
● Music Keyboard: https://youtu.be/ajtR6eDOaQI
● LED Water Level: https://youtu.be/n9GB0nfwG8s
● Police Light: https://youtu.be/PtmEqcRbu4w
● Vu-Meter Stereo: https://youtu.be/l8oUQpGAOCw
● Traffic Light: https://youtu.be/6iRjZMHVvhs
● Vu-Meter 40 LED: https://youtu.be/oWB2faToGAA
● Voltage Detector: https://youtu.be/yRWRsSASQTc
WARNING: This video is only for demonstration. I dont take any responsibility.
#Geiger #Nuclear #diyprojects DIY Geiger Counter with Test ☢️](https://i.ytimg.com/vi/mX9nxZz2M4g/mqdefault.jpg)


