Posted on Jun 24, 2012

This de voltmeter, with high input resistance, uses a CA3130 BiMOS op amp and measures voltages from 10 m V to 300 V. Resistors R12 and Rl4 are used individually to calibrate tbe meter for full:scale deflection.

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

Potentiometer R6 is used to null tbe op amp and meter on the 10-mV range by shorting tbe input terminals, then adjusting R6 for tbe first indication of upscale meter deflection.

Leave Comment

characters left:

New Circuits



Popular Circuits

VHF 5/8wave vertical antennas
Direction and speed control
Fast Video Signal Amplitude Measurer Circuit
h bridge Where to place decoupling capacitor
TDA2555 Dual Tv Sound Demodulator Circuits - Nxp Semiconductors
lm339 and bit of fun with accelerometer
Spy Phone Bug Transmitter Circuit
Circuit diagram for generating time delay with 555 IC
Audio Mixer Circuit
Multi-physics Model
Power LED Driver
Refrigerator working principle circuit indicator
DC motor speed control circuit diagram of a song