So I have designed a simple analog circuit that acts as a charger or as a discharger with some modifications.
My intent is 1,6A charge-/discharge current with 4,2V CV and 3,0V cut-off.
Charger: Discharger: The designs are very similar but differs in how the battery cell is connected. I would prefer if I could switch between charging and discharging using the 328p and not having to physically move or reconnect the battery cell. Switching the voltage reference can be done using analog switches, I think.
Any ideas on how this would be possible at a very low cost? I have considered relays but costs to much (>€2). Or is there a better (simpler, cheaper) design of the circuits that will do both charge and discharge?
One 328p have 8 analog port so the idea is 8 units on one pcb and then maybe 5pcs of pcb for a total of 40 channels...
