Laser Track Detection

Posted on Jan 22, 2013

The following diagram shows the basic laser pointer circuit. It is identical to the infrared circuit except that the infrared LED`s have been replaced by the laser pointer unit. Due to the long range of these devices this detector method can easily span great distances and could be used to detect trains in a long section of straight track such as in a lader yard or across the throat of a very wide yard.

Laser Track Detection
Click here to download the full size of the above Circuit.

Laser pointers are not designed for this type of application and careful selection of R1 is required. testing should be carried out to determine the best resistance value for a particular pointer. It is best to start with a high resistance for R1, 50

Leave Comment

characters left:

New Circuits



Popular Circuits

RS-232 to TTL cable with MAX232
Active Loudspeaker with Crossover II
6W Morse-Code Transmitter 7Mhz Circuit
Farnsworth Model GT-051 Bakelite Radio (1948)
am/fm radio & Pilot 100 stereo demodulator
Intelligent Solar Garden Light using an Arduino
Modular Benjolin
D0 Note xxxx
25 Watt Audio Amplifier Circuit
DTMF Receiver IC MT8870 Tester
Remote Ignition System 100kv StunGun
Transistor Tutorial Power Amplifiers Part 4
Dimming circuit using capacitance
Frequency electronic locks LM567 schematic
Automatic recording telephone interface circuit