Hello, I have a project which needs 'some power' when AC power shuts down, to e.g. do some processing and send information via SIM7600. I use normally an AC Power adapter 230Vac/9Vdc to power an UNO. But some testing learns that when AC power fails, the UNO almost instantaneously shuts down. By ad…

Capacitor for backup power

Paul_KD7HB February 18, 2024, 5:14pm 4

Consider how your capacitor will be charged. It will be a SHORT circuit for several seconds while it is charged. Can you afford that to happen with your design?

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Capacitor for backup power

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