Circuit diagram of sound-generating logic pen using CD4011
Source: InternetPublisher:李商隐身 Keywords: Power supply other power circuits Updated: 2020/10/18
The figure below shows the circuit diagram of a sound-generating logic pen made of CD4011. Using the device CD4011 to make a tester that can produce sound, so that our ears can also be used in the test, will greatly improve the test efficiency.
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