Free Tutorials on Electronics Light Detector Sensors, Free Electronics Projects

Dark Activated Switch
Free electronics Project.The light sensor used is the ORP12 photocell.
http://www.zen22142.zen.co.uk/Circuits/Switching/darksw.htm



Dark Light/Activated Relay
Free electronics project with diagram and its components, using sensor for Dark light activated relay
http://www.uoguelph.ca/~antoon/circ/actrelay.htm



Infrared circuits for remote control
These circuits are used to transmit a 1-4 kHz digital signal (OOK modulation) through infra light (this is the maximum attainable speed. schematic diagram, components.
http://jap.hu/electronic/infrared.html



741 Light Dark Sensor
Act as Light Detector Sensor, Free Project with diagram and its parts
http://www.uoguelph.ca/~antoon/circ/sensor2.htm




Light Detector Circuit
The light threshold at which the circuit triggers. The output device may be a low power piezo buzzer.
http://www.zen22142.zen.co.uk/Circuits/Switching/ldet.htm




Light Is On When Power Is Out
Lighting system that turns on automatically with loss of power. The preferred emergency light source is the white LED
http://www.maxim-ic.com/appnotes.cfm/appnote_number/3444




Free Project on Light Detectors
Visible and Infrared Light Detectors, Visible Light Photo-Detector Circuits, Basic CdS Photocell Detector, Infrared Light Photo-Detector Circuit, A Practical Quad Photo-Detector Circuit, Phototransistor Detector Relay Driver, Using Multiple Phototransistors,
http://home.cogeco.ca/~rpaisley4/PhotoDetectors.html




Free Electronics Project with schematic diagram and materials
3 Transistor Audio Amp , Improved 3 Transistor Audio Amp , Telephone Audio Interface, LED Photo Sensor, Triangle and Squarewave Generator, Low Frequency Sinewave Generators, Touch Activated Light, AC Line Current Detector, Decibel Meter.
http://ourworld.compuserve.com/homepages/Bill_Bowden/page8.htm#light.gif