8/27/2023 0 Comments Cen tech battery charger schematicHow to set the battery charger circuit cutoff threshold: Hence, switch off the circuit but RED LED will glow pointing to the completion of charging. When the battery gets fully charged its voltage reaches the threshold voltage, this voltage changes the output of the OP-AMP to high. This cuts power supply to the battery.ĭuring the charging process, green LED glows which indicates that the battery is charging. The potentiometer is set such as that exactly at threshold voltage the Zener breakdown occurs, and Zener Diode starts conducting making output of OP-AMP high. This happens as the battery charges the potential across the Zener Diode increase. If Battery charges up to threshold voltage, opamp will turn on the transistor and it will act as the switch and relay will be energized. The threshold voltage is applied at the non-inverting pin of the opamp. We apply a reference voltage on the inverting pin of LM358. To set the Battery charging threshold voltage, LM358 and two potentiometers (or trimmer) have been used. Then it is fed to the battery charging circuit. It is regulated to 14V by using voltage regulator Lm317. Then it is rectified and smoothen by capacitor C1. Working of automatic battery charger circuit:įirst of all, the 220V AC is stepped down by transformer to 15V.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |