Proximity detector schematic

  
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A very simple proximity detector electronic project can be designed using this schematic circuit. This proximity detector electronic project use a tone decoder integrated circuit ( NE567 ) that will provides a signal with a frequency about 100Khz. When an object is placed near the sensor, the capacitance between sensor is increased. The Q1 and
Proximity detector schematic - schematic

Q2 transistors will amplify the signal and fed it to the NE567 IC, that will make the LED1 to glow.



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