ERKAR Stereo LED Vu Meter Circuit - Lm3916

Professional stereo led vu meter circuit board (*blank pcb board) led stereo vu-meter circuit board lm3916 *we do not have material supply service. *vu meter /vu-meter project is sold as blank pcb board. What is vu meter / vu meter? Vu meter is a measuring instrument used to measure the sound intensity in electronics. The vu prefix in the name is an abbreviation of the english words volume unit. Pcb features 2 layer pcb 98.89 x 51.27 mm fr-4, 1.6 mm, 1oz, pcb surface finish: hasl with lead - this wonderful vu-meter is designed to display two different sound signals in the range of -20db to +3db. Each channel is driven by a great ac lm3916 for vu-meter.in the dot mode, led 1 lights at reduced brightness as an indication of full-scale. Component material list

2x lm3916 - 2x dip 18 pin (optional)

21x led 3mm (20 leds for the meter - 1 led as pwr)

4x 2.7k? Resistor - 2x 100k? Resistance

1x 1k? Resistor -

2x 1uf @ 25v electrolytic capacitor

1x 220uf @ 25v electrolytic capacitor

2x 1n4007 diode - 2x pin for dot / bar mode

the vu meter circuit must be powered by a 9v dc power source / mains electricity.