Short communication design and construction of a laser controlled switch circuit

Abstract EN

A laser control system is designed and constructed in this work.

Diode laser with wavelength 670nm and output power 1mW was used to operate the 555timer and JK flip-flop for a different time intervals.

The operation time is calculated and measured through the capacitor value of the circuit.

The response of the electronic circuit is tested to work with different lasers.

(i.e.

He-Ne laser 632.8nm with output power 1mW, diode laser 820nm with output power 75mW, and using the diode laser 670nm, with output power 1mW).

The electronic circuit is made to respond for all the lasers with wavelength in the visible portion only.

To operate the circuit by a single laser wavelength, a suitable filter is selected, then the circuit had been operated with the diode laser 670nm only.

This means that the electronic circuit was controlled and operated using one laser as switch.

The operation of the circuit by using specific laser for different distances is tested.

It has shown that the maximum distance for the diode laser (670nm), is 50 meter.