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#1
April 6th 20, 10:29 AM
posted to rec.aviation.soaring
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Battery switching without tears
At 06:26 06 April 2020, krasw wrote:
On Sunday, 5 April 2020 13:15:06 UTC+3, Tim Newport-Peace wrote: Interesting. Many years ago Volkslogger had a similar issue and it is worth examining their solution. Only the instrument in question (LX9000) needs protecting, not the entire Avionics Bus. Wait, don't all other instrument "see" the capacitor in LX9000 as well? It does not matter where the capacitor is physically, it still supplies current to the whole circuit (which is closed, apart for batteries for a short while)? The Schottky Diode mentioned is there to prevent this. It isolates the instrument and it's capacitor from the rest of the instruments. 12v----diode-----instrument/capacitor. 
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