Presence detector, proximity sensor circuit
This circuit react in presence of any conductor object including humans. This circuit does not detect object movement but can act as an proximity sensor!
Sensitivity is adjustable with P1 which will be located at a great distance from the rest of the presence detector circuit.
The presence detector is built with an Clapp oscillator at 1MHz.
Do not bring metallic objects close to circuit! This circuit can be used as a aggressive liquid detector.
Related Schematics
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