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You are right
about the input voltage requirement. He would need at least 4.2V + 3V = 7.2V.
But I disagree that wiring a circuit with 2 transistors and 2 resistors is easier than wiring a single 3-pin device. IMO, it's the discrete components that are overkill.
you think that if I increase the input voltage I will be able to use it for a 7.2V pack?
Soeren,I am using 6 AA size NiMH 2300 mAh (Rayovac I-C3) in a battery pack. Normally I charge these batteries in a 15 minutes charger, but I would like to build a charging base for the robot to auto charge, so I want to charge them as a pack. I know I can't charge them in 15 minutes, but what could be the fastest charge time for them and what charger circuit can you recommend? I would like to built the circuit myself instead of buying a ready made one.Thanks in advance and sorry for stealling the thread...
If you want an LED to show when charging/done or have other questions/requests about the circuit, just tell me.
You think it's hard to add this to the circuit schematic?
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