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Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
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Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Light/Laser
Simple 2-BJT LED constant-current driver operates to within 0.7V of the supply voltage.
LV, LP, CC driver allows two alkaline or NiMH cells to steadily power a Red LED until discharged.
Automatic Street Lighting System
2013-01-24
The driving theme behind the Automatic Street Lighting System is an energy-saving streetlight schem
Mains-powered LED night-light
2012-11-09
I'm probably re-inventing the wheel, but here are a few variations of a mains-powered night-light f
120v 4-LED Night Light
2011-11-13
This circuit uses can be used as a night light. It uses a 120v Mains to power the circuit. Works li
Light Activated Switch
2011-09-04
The circuit is based on National Semiconductors comparator LM311 (IC1) and an LDR. The non invertin
Dark Detector
2011-06-16
The dark detector circuit shown here can be used to produce an audible alarm when the light inside
10 Channel Light Bulb Sequencer
2011-05-15
Here is a simple 10 channel light bulb sequencer circuit which you can build up to decorate your ho
Basic IR Communications
2011-02-07
Creating an infrared (IR) communications link can be very useful. Some examples of projects which
Strobe Light
2010-07-06
Strobe lights are widely used by disco lovers to create wonderful visual effects in disco halls and
This cct uses 4026B ICs to drive 1.5" 7 Segment LED Displays. Even at 5volts these are quite bright
240 Volts 100 Hertz 29 LED lamp
2010-07-05
This is the improved version of the LED lamp posted about 1 year ago which ran on half wave rectifi
Flashing a LED with Mouse
2010-07-05
Don’t throw your old mouse do a fun project with it. This is the simplest project I have ever mad
Triac light bulb flasher
2010-07-05
This 800 W light bulb flasher operates directly off the line and needs no transformer. Power for th
Digital slave flash trigger
2010-07-05
This unique circuit has been tried with all three of my cameras and two others and works perfectly.
7-Segment LED Counter (binary and base 10)
2010-07-05
Here is something that I was able to build, it basically takes the pulse from a 555 timer and goes
Laser or IR beam alarm system
2010-07-05
This is a cool little circuit that i made for a school project. It can be used as one of those thin
Latest threads
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opinion request on 2 different comparator circuit designs- Started by earckens
- Replies: 1
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