A solar battery charger


Posted on Feb 6, 2014

This circuit is intended for charging sealed lead-acid batteries with a solar panel in small and portable applications. The customary diode that prevents the battery from discharging through the solar panel has been replaced by a FET-comparator combination. The charger will stop charging once a pre-set voltage (temperature compens


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

ated) has been reached, and recommence charging when the voltage has dropped off sufficiently. The load is disconnected when the battery voltage drops below 11V and reconnected when it gets back to 12. 5V. If I ground the first two comparators (LM393) in the same place as the third, i. e. not between the FETs, the thing won`t work and the battery will discharge over the solar panel. Why Am I playing to close to the rails How can this be remedied/improved/redesigned Do I need a diode between the comparator`s imputs If I use micropower comparators like the Texas Instruments TLC393, the comparators blow up spectacularly, but with the standard LM393 everything works fine. Why What did I miss




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Magnetic Card Reader with PIC12F675
Polarity converter
Fast High-Voltage Linear Power Amp Circuit
S Meter For Communications Receivers Circuit
SQUARE WAVE GENERATOR EMBEDDED C
Voice Bandwidth Filter
LM331 Frequency to Voltage Converter
Two motor speed control circuit and the main level indicating circuit



Top