Radio and AC switching switch circuit diagram

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For desktop semiconductor radios equipped with semiconductor regulated power supplies, users often forget to dial the 220V power plug after turning off the volume switch, causing long-term power consumption and even burnout.
The circuit described here only needs to add a switch K1 as the AC/DC switch to turn off or turn on the radio power. When the AC/DC switch K1 is in the “AC” position, the heart cooler switch K2 only controls the 220V power supply, and the battery DC is disconnected by K1. When it is in the “DC” position, K2 only controls the battery, while the 220V AC power supply is early. Cut off by K1.