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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.

  • 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

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4.5-W 600-Lumen LED Emergency Light Circuit
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Simple 2-BJT LED constant-current driver operates to within 0.7V of the supply voltage.
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LV, LP, CC driver allows two alkaline or NiMH cells to steadily power a Red LED until discharged.
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The driving theme behind the Automatic Street Lighting System is an energy-saving streetlight schem
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I'm probably re-inventing the wheel, but here are a few variations of a mains-powered night-light f
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This circuit uses can be used as a night light. It uses a 120v Mains to power the circuit. Works li
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The circuit is based on National Semiconductors comparator LM311 (IC1) and an LDR. The non invertin
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Dark Detector 2011-06-16
The dark detector circuit shown here can be used to produce an audible alarm when the light inside
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Here is a simple 10 channel light bulb sequencer circuit which you can build up to decorate your ho
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Creating an infrared (IR) communications link can be very useful. Some examples of projects which
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Strobe Light 2010-07-06
Strobe lights are widely used by disco lovers to create wonderful visual effects in disco halls and
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