In the diagram as you can see two LED’s are placed in opposite directions so when one LED is ON the other LED will be OFF. I have used Red and Green LED’s. When node A is positive green LED glows ...

Circuit Diagram - LED VU Meter. The circuit diagram of the LED VU meter is very simple and easy to understand. ... There is a diode inside the chip which is used to protect the chip from signals going ...

In production, this may be replaced with a zero Ohm resistor. The open circuit protection circuit shown utilizes R9, causing it to serve an additional function, in conjunction with Zener diode D2. In ...