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#11
April 14th 20, 06:25 AM
posted to rec.aviation.soaring
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Battery switching without tears
I used Shottky diodes plus power resistors plus capacitors. I'm no EE but I took enough circuits courses to handle this problem. The Shottky diodes keep the batteries from cross-discharging each other, the capacitors keep the instruments powered when the switch is disconnected from battery 1 and before it is connected to battery 2 and the resistors keep the capacitors from drawing too much current when you power them up since they make the circuit (even with the diodes) look like a direct short initially.
Andy On Monday, April 13, 2020 at 1:08:16 PM UTC-7, kinsell wrote: That could be a significant voltage drop across the resistors. I'd use a couple power Schottky diodes instead. 
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