3 6 volt cell phone battery meter


Posted on Feb 4, 2014

This is a similar circuit to the above and provides a 4 LED bar graph indicating the voltage of a common 3.6 volt Lithium - Ion recharable cell phone battery. The reference voltage is provided by a TL431 programmable voltage source which is set to 3.9 volts where the TL431 connects to the 1K resistor. The lower reference for the LED at pin 14 is set with the 5K adjustable resistor..


3 6 volt cell phone battery meter
Click here to download the full size of the above Circuit.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Air Ioniser circuit
220 V LED Night light
Monostable circuit
Fsk-data-receiver
two servo walking robot using TI launchpad
Automatic Battery Charger 6V-12V with Relay cut off by LM324
Flight Computer Assembly Instructions
Multivibrator infrared transmitter circuit



Top