What's inside a digital socket timer (with schematic)

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Today, let's take a look what's inside a digital socket timer. Let's also reverse engineer the schematic of its power board. This timer was faulty, but it came back to life after recharging the backup battery. Sometimes you have to replace the battery to repair it. Other common failures are the relay, the Zener diode, which gets very hot, and the electrolytic capacitor.

Видео What's inside a digital socket timer (with schematic) канала DiodeGoneWild