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

Audio frequency generator
Mic condenser amplifier circuit
ba1404 fm stereo modulator
radio receiver circuit long and medium wave
wireless picaxe based water tank level sensor
lfr using 555 timer
hacking rfid for fun
cat and dog repellent
Power Amplifiers Audio Circuits
18 dB LT1253 DDS Amplifier
Modify the Linksys hardware