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

Window-comparator
Digital-frequency-doubler
Subwoofer Filter Circuit Using Op-Amp TL072
Duplexing wireless series transmission scheme of the one-chip computer
Automobile turn signal circuit
Diac Applications
Changes to the MXMs Audio Signal Path
switching between parts circuit pulse input
Isolated 1-Hz Clock
GP2D12 distance sensor



Top