battery charger circuit


Posted on Feb 7, 2014

This handy circuit can be used to charge from one to 12 NiCd cells from a car battery. Up to six cells can be charged with switch S1 in the `normal` position. The LM317regulator operates as a simple current source, providing about 530mA when R1 = 2. 35O (two 4. 7O resistors in parallel). For more than six cells, S1 is set to the `boost` position. Th


battery charger circuit
Click here to download the full size of the above Circuit.

is applies powers to IC1, a 10W (or 20W) audio power amplifier. Positive feedback from its output (pin 4) to non-inverting input (pin 1) causes IC1 to act as a square wave oscillator. This square wave signal is coupled to the junction of Schottky diodes D1 and D2 via a 330 µF capacitor, forming a conventional charge-pump voltage doubler. Over 20V (unloaded) appears at the input to REG1 - enough to charge a maximum of 12 cells!




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Two channel frequency synthesizer
Reaction Timer
Telephone Voice Mail Alert Circuit
lan tester circuit
tweak fusing valves.
Simple Alarm System
2SC1946A 30 Watt VHF Amplifier
T3SE type 3 SE
Microcontroller Clocking a Transmitter?
Two Simple 24-Hour Timer Circuit Schematics



Top