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Wireless Doorbell Transmitter Circuit

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Publish time:10-26-2020
The initial circuit we will explore has a 32kHz crystal to emit tones, which means the receiver cannot be triggered by mistake.Commercial rx-3 circuits may experience a failure every 2 minutes, possibly because the chip detects an ambient disturbance from the RF transistor at a frequency of 1kHz or 250Hz to turn on the output.
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