Precision battery voltage monitor


Posted on Aug 15, 2012

The precision voltage-monitor chip contains a temperature-compensated voltage reference. R1 divides down the battery voltage to match the built-in reference voltage of ICl (15 volts). When the voltage at pin 3 falls below 15 volts, pin 4 supplies a constant current of 7 mA to drive a small LED


Precision battery voltage monitor
Click here to download the full size of the above Circuit.

About 0 volt of hysteresis is added with R2. Without hysteresis, the LED could flicker on and off when the monitored voltage varies around the set point, as might be the case on voice peaks during receive.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Wide Basic for ATtiny2313
Fuel Tank Pressure Sensor Circuit with explanation
Schematic Diagram FM Transmitter 4Watt
Dynamic Microphone Preamp
Simplest RF Transmitter circuit diagram
Hi-Fi Tone Control
differential analog switch circuit
lfr using 555 timer
Tone Generator Circuits
Tactile feedback solutions using piezoelectric actuators
LED Bike Light Circuit Project
telephone number display circuit diagram
3-Bit Binary counter
Halogen Lamp Dimmer With Soft Start
PWM Dimmer/Motor Speed Controller
Meter check of a diode
Optical coupling electrocardiogram measuring instrument circuit
FM by a timer ME555 circuit



Top