CD4069 does inductive electric press ----- CD4069 Test Pencil

The inductive electrical pen circuit diagram is as high as the ordinary measurement, and can be used to measure whether the wire is charged, which is the ordinary measurement. The ICL is a six-inverter integrated circuit CD4069, and its inverter IC1-1 and the peripheral components form a high input impedance, high gain voltage amplifier. After the probe receives the weak electric field signal, the output is enlarged by the amplifier and controls the post-level circuit through the inverter ICL-2 shaping. The inverter ICL-5, IC1-6, and resistor R5, R5, and capacitance C2 constitute a multi-resmicker, and its work is controlled to operate the inverter ICL-3. When the probe detects the signal, the ICL-3 outputs a high level, the diode VDL is closed, and the oscillator is operated, and the piezoelectric ceramic sheet HTD is pushed. At the same time, the inverter ICL-4 outputs high level, the transistor VTL is turned on, and the red light-emitting diode LED2 is lit and indicates that the tang is charged. The sensitivity of the sound and light can be adjusted by adjusting the potentiometer RPL, adjusting the capacitor C2, and the resistor R5 can obtain a satisfactory tone. This circuit has a very power consumption and can be powered by two button batteries.

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