Simple and easy to make luminous logic detection pen circuit diagram
Source: InternetPublisher:同住地球村 Keywords: power display power supply Updated: 2020/08/30
As shown in the figure below, it is a circuit diagram of a simple and easy-to-make luminous logic detection pen. This circuit is mainly composed of a six-inverter CD4069 and a light-emitting diode. The test results of the logic state can be displayed by the light-emitting diode, or can be prompted by a sounder, or can be displayed by a digital light-emitting diode.
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