Led Millivoltmeter


Posted on Jan 2, 2013

This circuit uses a dc amplifier (324) in a bar-graph circuit that uses an LM339 Quad comparator IC to sense dc levels.


Led Millivoltmeter
Click here to download the full size of the above Circuit.

The LEDs will light every 100 mV. The 324 op amp is configured to provide a gain of 100 to increase this sensitivity to 1 mV. Two auxiliary LEDs indicate "power on" and "xlOO" gain setting.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

RealView 2.0
Xor-gate-up-down-counter
Doorbell with IC555
flip flop led flashing circuit
motor-control-microcontrollers-miscellaneous
On-off Infrared Remote Control
3 Band graphic equalizer circuit
LT3083 current limiting
MC2833 FM transmitter circuit design electronic project
Sound Blaster Microphone Preamplifier
Armstrong Oscillator
interfacing rs 232 with spartan 6 fpga
Sinusoidal Oscillators
Dragon -ZL-2801A DVD machine type switching power supply circuit
Single-ended Class A amplifier circuit diagram of 6N1 + 6P3P



Top