Voltage Comparator Switch


Posted on Sep 17, 2012

This circuit will provide an indication whenever the input voltage differs from two defined limits, V1 and V2. The supply voltage, Vcc must be higher than the highest input voltage by at least 2 volts. One application here is to monitor a 12V car battery. V1 could be set to 14V and V2 to 11V thus giving an indication of over charge or a weak battery.


Voltage Comparator Switch
Click here to download the full size of the above Circuit.

The op-amps used here are MOSFET CA3140. They are used to advantage as they have very little output offset voltage and can switch down to near 0volts. If any other op-amp is used such as LF351 or CA741 then it will be necessary to have an offset null cont




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Four Foot Box Loop Antenna
Motor Fan heat controller
Motorcycle 13.6V 3A charger
boost converter circuit for digital
Connecting Infrared Thermometer MLX90614
microSD ATmega32 Data-Logger
Robot Tutorials
RING COUNTER WITH VISUAL READOUT
LED Lighting For Dual-Filament Lamps
Infrared control dimming circuit
50W AM Valve RF Transmitter circuit



Top