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Touch switch to control the circuit of power on and off
Source: InternetPublisher:兰博 Keywords: power supply LED switch Updated: 2021/01/31
Touch switch to control the circuit of power on and off
In the picture, a 74HC74 digital IC is used. Pin 14 is connected to the positive pole of the power supply, and pin 7 is connected to the negative pole of the power supply. The power supply voltage range is 2-6V. When the button is pressed once, the LED lights up and switches once.
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