Thread: Charging the 7.2 Volt Batteries
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Unread 13-01-2006, 14:47
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Al Skierkiewicz Al Skierkiewicz is offline
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AKA: Big Al WFFA 2005
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Re: Charging 7.2V Backup Battery
Quote:
Originally Posted by Alan Anderson
That's a very odd looking circuit. I don't understand the point of the regulator, and I see nothing to prevent the backup battery from powering anything else that's connected to the main battery input.
Alan,
I agree, the only limiting factor is the big resistor between the main and backup battery. According to my calculations, the regulator is set for 8.26 volts output which at full charge will still attempt to pump about 45 ma into the battery with the controller turned off. With everything up and running, the zener will be turned on at 8.7 volts.
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Al
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Last edited by Al Skierkiewicz : 13-01-2006 at 14:53.