Vu-Meter 40 LED on PCB with LM3915 TUTORIAL

■ JLCPCB Prototype for $2(Any Color): https://jlcpcb.com This is a Vu-Meter with 40 LEDs and four LM3915 on awesome Black PCB! ▼ ▼ ▼ ▼ ▼ ▼ ▼ ■ Download Project Files: PDF Diagram: http://bit.ly/2SkHyTE or see it at 10:08 PCB Layout: http://bit.ly/2XL9aXU or see it at 10:15 PCB Gerber: http://bit.ly/2Z1Uj84 (Ready for JLCPCB) Like, Share and Subscribe :) This Vu-Meter is composed of four LM3915 in cascade, for a total of 40 LEDs and a range of 90dB. The circuit must be powered with 9V DC and connected to the amplifier output (or preamplifier). After trying the excellent service offered by JLCPCB I recommend it, the quality of the PCB is high, customer service is always available and professional, the time of realization is short and the delivery of PCBs is by express courier. JLCPCB is a great place to get hight quality custom circuit boards at an extremely low price, you can buy 5 PCB Boards (Any Color) for 2$ !!! More About JLCPCB: https://support.jlcpcb.com/collection... Components: 40x LEDs 5mm (33 Green, 3 Yellow, 4 Red) 1x LED 3mm (Any color, as you prefer) 4x LM3915 ICs 4x 18 Pin DIP 2x 1KΩ Resistor 1/4W 1x 100KΩ Resistor* 1/4W 8x 2.7KΩ Resistors 1/4W 1x 1uF @ 25-100V Electrolytic Capacitor 1x 220uF @ 25-100V Electrolytic Capacitor 1x 1N4007 Diode 1x Button (as TEST Button) PCB: (Ready for jlcpcb.com): http://bit.ly/2Z1Uj84 *Don't use my PCB for profit or sponsored videos. *NB: If the first LEDs stay on without music replace this 100KΩ resistor with another 50KΩ or 10KΩ resistor.. may be necessary with some amp models. You can see the complete procedure to upload the Gerber file on jlcpcb.com in the video from 1:20 JLCPCB have a Technical Support for exporting Gerber files from many software at this link: https://support.jlcpcb.com/category/2... For any other questions you can ask me for explanations in the video comments:) ► Subscribe to my Channel:    / stefano91ste   WARNING: This video is only for demonstration. I don't take any responsibility for damage to things, people and animals. Music: Soldiers by Vexento -    • Vexento - Soldiers   ---------------------------------------------------------------------------------------- ■ LINK YouTube:    / stefano91ste   Instagram:   / stefano91ste   ■ Do you want to Make a PCB? Look this:    • Vu-Meter Stereo -20 +3dB LM3916 - PCB TUTO...   #VuMeter #Tutorial #PCB