Three-step level indicator


Posted on Jul 17, 2012

This circuit makes a very compact level indicator where a meter would be impractical or not justified due to cost. Resistor values will depend on type of LED used. For MV50 LEDs the resistors are 2 K for steps of approx 2 V and current drain with all three LEDs on of 5 mA


Three-step level indicator
Click here to download the full size of the above Circuit.

The chain can be extended but current drain increases rapidly and the first LED carries all the current drawn from the supply.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Bipolar power supply for battery instruments
Put-battery-charger
Led Millivoltmeter
Electronic Thermometer
Very Low Power 32kHz Oscillator
Precision Monostable Multivibrator Circuit
1880MHz internal bias circuit diagram of the amplifier application collector RF2324



Top