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Laser Circuits

Lasers:  #'s - H      I - L      M - Z

Last Updated: October 13, 2017 03:07 AM

Circuits Designed by Dave Johnson, P.E. :

40Khz Burst Laser Diode DriverSome laser tag or simulated combat games can use this circuit to send short bursts of modulated laser light at the opponent's vest, equipped with a matching light receiver.  The circuit operates from three 1.5v cells   (4.5v) that should provide enough energy . . . Hobby Circuit designed by David A. Johnson P.E.-June, 2000

Laser Diode TesterThis circuit can either be used to test laser diodes or as a general purpose modulated light source.  The circuit has an adjustable diode threshold current and an adjustable modulation frequency.  The frequency can be adjusted from below 30KHz to above 50MH. . . Circuit by David Johnson P.E.-March, 1999

LED/Laser Light Output Intensity MeterThis circuit uses a large 1cm X 1cm silicon PIN photo diode and a transimpedance amplifier to measure the light power output of infrared and visible LEDs and laser diodes.  It can be modified to produce almost any milliwatts to volts scale factor.  It can b . . . Hobby Circuit designed by Dave Johnson P.E.-July, 2000

Micro Power 40Khz Burst Laser Diode DriverSome laser tag or simulated combat games can use this circuit to send short bursts of modulated laser light at the opponent's vest, equipped with a matching light receiver.  The circuit operates from three 1.5v cells (4.5v) that should provide enough energy. . . Circuit by David Johnson P.E.-June, 2000

 Count Cars with LaserThis is an illustration how a laser could be used to count traffic and measure the speed of each car passing through the sensor area . . . Hobby Circuit designed by David A. Johnson P.E.-January, 2007

 Laser Used as Vehicular Traffic CounterThis is an illustration how a laser could be used to count traffic and measure the speed of each car passing through the sensor area. . . Circuit by David A. Johnson P.E.-January, 2007

 Tester for Modulated Laser DiodeThis circuit can either be used to test laser diodes or as a general purpose modulated light source.  The circuit has an adjustable diode threshold current and an adjustable modulation frequency.  The frequency can be adjusted from below 30KHz to above 50MH . . . Hobby Circuit designed by Dave Johnson P.E.-March, 1999


Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

40Khz Burst Laser Diode Driver -  Some laser tag or simulated combat games can use this circuit to send short bursts of modulated laser light at the opponent's vest, equipped with a matching light receiver.  The circuit operates from three 1.5v cells    (4.5v) that should provide enough energy . . . Hobby Circuit designed by David A. Johnson P.E.-June, 2000

A Simple Circuit & inexpensive laser power meter -  The construction of a simple and inexpensive laser power meter is described.  The laser power is monitored using a calorimeter sensor which is based on the use of commercial platinum resistors.  In this design, the use of volume absorbing glass enables the meter to withstand peak power densities in the region of 100 MW cm-' and average powers in excess of 10 W at 1.06 pm __ Designed by A. I. Ferguson

A Thermoelectric Cooler Temperature Controller for Fiber Optic Lasers: Climatic Pampering for Temperamental Lasers -  Linear Technology AN89 __ Designed by Jim WilliamsApr 1st, 2001

Alarm using a Laser Beam! -  When I did the First Design of this project I used a 3 Terminal "2N5777".  Later I found some manufacturers changed this part to a Two Terminal Device, But the 2 Pin Version is the same, just without that adjustment.  Additionally some persons have had troubles in getting the Relay to work.  "The Circuit IS Correct".  In Any Case, the New Design below uses an SCR to Acomplish the same thing
as the Relay.  And its Cheaper.   __ Designed by G.L. Chemelec

AN89A Thermoelectric Cooler Temperature Controller for Fiber Optic Lasers: Climatic Pampering for Temperamental Lasers -  Linear Technology AN89 __ Designed by Jim WilliamsApr 1st, 2001

Biasing & Modulating Laser Diodes -  After several mishaps trying to set up laser diode feedback regulators I decided there had to be a better way! The following circuit is a result of my experimentation.  This regulator has been used for CW, MCW, FM, SSB, BPSK and video with no difficulty.  Since going to this circuit I have not lost a single laser diode! It has been used with laser diodes from 5 mw to 500 mw. __ Designed by JohnK3PGP

Build your own Light Painter -  A touch sensitive mutlicolor light wand. __ Contact: Jameco Electronics

Circuit provides laser-diode control -  09/19/02 EDN-Design Ideas Laser diodes are sensitive to ESD, rapid turn-on currents, and overvoltage conditions.  To address those problems, the simple laser-diode controller in Figure 1 has several functions.  The first part of the circuit comprises an 8.2V zener diode, D1 that forms the heart of a constant-voltage source for the laser diode __ Circuit Design by Michael Fisch, Agere Systems, Longmont, CO

Circuits for biasing & Modulating laser diodes -  After several mishaps trying to set up laser diode feedback regulators I decided there had to be a better way! The following circuit is a result of my experimentation.  This regulator has been used for CW, MCW, FM, SSB, BPSK and video with no difficulty.  Since going to this circuit I have not lost a single laser diode! It has been used with laser diodes from 5 mw to 500 mw.   __ Designed by John, K3PGP

Communication with Laser Beam -  Communicating with laser is not new.  Here the laser beam is used as a carrier, which is modulated by the signal to be transmitted.  On the receiver end, the desired signal...__ Electronics Projects for You

Complete Helium Neon Laser Power Supply Schematics -  11 AC line and 4 inverter types, most you can build

Count Cars with Laser -  This is an illustration how a laser could be used to count traffic and measure the speed of each car passing through the sensor area . . . Hobby Circuit designed by David A. Johnson P.E.-January, 2007

CW-PWM-AM Laser Transceiver-G0MR - F -  Schematic only __ Designed by va3iul

Diode Laser Power Supplies -  Drive requirements, modulation, sample circuits for low and high power devices

Experimental laser data link -  This document tells about one of my experiments with semiconductor laser modules.  I bought one semiconductor laser for all kinds of experiments.  This TIM202 module is a small  (38x14x14 mm) semiconductor laser module, similar to those types used in laser pointers.  It takes 3V 45mA and outputs 3-5mW 670nm laser beam. __ Designed by Tomi Engdahl

FM Laser Transceiver-VK7MU -  Schematic only __ Designed by va3iul

Heathkit Modulated HeNe laser power supply kit (HK-HI1) -  Schematic only, no circuit description __ Designed by Don Klipstein

HeNe Laser Power Supply -  If you have ever worked with lasers, you know how fun and interesting it can be, you also know how expensive it can be.  The high voltage power supplies for the laser tubes are often more expensive then the tubes themselves.  This supply can be built with commmon parts, most of which you probably already have in your junk box.  The secret is the transformer used.  It is a common 9V 1A unit, connected backwards for step up __ Designed by Aaron Cake

HeNe laser power supply -  This is the power supply I traced out and measured which is in an Edmond Scientific 0.5 mw. Laser circa probably around 1975. I bought a 1mw. tube  (1986) when the old one broke. It is still running just fine. I think it is a rather clever design. __ Designed by Tomi Engdahl

HeNe Laser Transmitter/Receiver -  This set of two circuits from the basis for a very simple light wave transmitter.  A LASER beam is modulated and then aimed at a receiver that demodulates the signal and then presents the information  (voice, data, etc) .  The whole thing is very easy to build and requires no specialized parts execpt for the LASER itself.  LASERs are available from MWK Industries.   __ Designed by Aaron Cake

Home Built Laser Projector -  Laser projector is one of the laser display equipments.  This project builds the closed-loop galvos mainly and aiming at professional grade.   __ Designed by The Electronic Lives Manufacturing-presented Chan


Lasers:  #'s - H      I - L      M-Z

 


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