Proximity detector


Posted on Sep 25, 2012

This circuit provides a means of detecting the presence of anything by the reflection of infra-red light and provides a direct digital output of object detection. By the use of modulation and high power bursts of infra-red at a very low duty cycle, a detection range of over a foot is achieved


Proximity detector
Click here to download the full size of the above Circuit.

Works on the principle of transmitting a beam of modulated infra-red light from the emitter diode LED2, and receiving reflections from objects passing in front of the beam with a photodiode detector Dl. The circuit consists of an infra-red transmitter, photodiode amplifier, and a variable threshold comparator.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Phase reversal detector
10Mhz coaxial line driver
M3850A Programmer
2 Transistor FM Voice Transmitter
The Accelerometer Circuit
iPod FM Transmitter
Download NL5 Non-Linear Electronic Circuit Simulator
Recorders automatic shutdown circuit diagram TWH8778



Top