Thread: (Earlier version of) Backup onboard charger not correct
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Unread 23-01-2007, 09:43
dcbrown dcbrown is offline
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Re: Backup onboard charger not correct
Quote:
You can switch the power (12v) with a spike. Then when the robot is shut down, the charger is off. Drain to the backup battery in this case would be through r3/r2, about 5ma.
Excellent idea. I'm sure there is spike already in the mix somewhere that is on if not on all the time, then most the time. The better idea would be a steering diode below the 'batt' point in the schematic... but the schematic isn't likely to change at this point so the spike at least addresses 1/2 the discharge/back power issue with the current charger design.

thanks!