Ok this is to charge a lead acid 12v 1.2ah battery. My bulk charge is 20% of capacity (240mA) and my float charge voltage is 14.2.
The schematic bellow is what I want to test but I need input as to if it will work or not, and if not why?
The power supply is either 32v or 16v. I think I will need to use 32v because the dropout voltage of the LM317’s will be too much. Ok for the bulk charge transistor X is off. Thus two constant current sources are in series, which is 2 LM317’s with a 5ohm resistor going to the adjustment pins. So I get a 250mA current. The arduino switches transistor Y off (which cuts the charging circuit) every minute or so to measure the battery voltage. When the battery voltage reaches 14.1v the arduino turns transistor X on. Now it’s a constant voltage source of 14.1v and a constant current source of 250MA. After this point I will need to measure current some how and then switch transistor Y off again when I’m happy that the battery is charged fully.
So will this work? Thank for any help. Sorry about the schematic, I drew it in pencil, u might have to zoom abit