Relay Output Proximity Sensor

Posted on Mar 6, 2013

Ql is used as an oscillator around 300 kHz. R9 is set so that the oscillator just begins to run. An object ne

Relay Output Proximity Sensor
Click here to download the full size of the above Circuit.

ar the antenna will load the circuit down, and stop the oscillations. This is detected by buffer Q2, diodes Dl and D2, and this activates relay driver Q4, which operates the relay.

Leave Comment

characters left:

New Circuits



Popular Circuits

CDV700 Geiger Counter
Phase detector with 10-bit accuracy
Digital Entry Lock Circuit
Extensible Multiple Device Programmer 4 Base
1w led driver
Circuit for a test circuit with the PIC16F84A
easy and cheap cdv 700 tube adapter
Silicon photocell remote control circuit
Anti-theft car audio system circuit diagram