audio driver relay
Source: InternetPublisher:国民男神经 Keywords: Power supply other power circuits Updated: 2020/04/11
The LM567 tone decoder will respond between frequencies of 700 and 1500 Hz, and the LM567 tone decoder is determined by the setting of the 10K potentiometer. When the 100m VRMS input reaches the preset frequency, the output of the IC goes high and energizes the relay through the transistor.
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