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LED display unit – Circuit Schematic
LED display unit
For a couple of recent projects we have been asked to provide interesting and informative display units. We decided to build a unit which can be used in a numbe...
Triac light driver – Circuit Schematic
Triac light driver
Controlling room lighting using computer. I bought some triacs and opto couplers to do this. I drew the schematic and built a prototype. Everything worked well....
Railroad Signal Driver – Circuit Schematic
Railroad Signal Driver
This circuit can be used for lighting a single (prototype) railroad signal. You could use this to drive a model railroad signal, but only if it is for a static ...
VU LED Level Meter – Circuit Schematic
VU LED Level Meter
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Led circuits – Circuit Schematic
Led circuits
The circuit below illustrats powering a LED (or two) from the 120 volt AC line using a capacitor to drop the voltage and a small resistor to limit the inrush cu...
12 Volt fluorescent lamp drivers – Circuit Schematic
12 Volt fluorescent lamp drivers
Whenever there is a need for battery-powered lighting, like for camping, solar powered cottages, cars, boats, planes, or emergency purposes, fluorescent lamps h...
More LED Flashers – Circuit Schematic
More LED Flashers
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Pyro Propeller Clock POV Circuit – Circuit Schematic
Pyro Propeller Clock POV Circuit
The Pyro Propeller Clock POV schematic is actually not very difficult. There are three main parts: the power supply which uses a 7805, the LED output control wh...
UV/IR/Visible LED Flashlight with Intensity Control – Circuit Schematic
UV/IR/Visible LED Flashlight with Intensity Control
Build a 10W LED flashlight that features swappable UV/IR/visible heads. We decided to document the build since this flashlight would fit nicely in a photographe...
Tabletop Tree Lights – Circuit Schematic
Tabletop Tree Lights
A cheap garland tree and fill it full of blinking LEDs. The tree shown is a cheap garland wrapped plastic frame from Walmart. It could easily be made, but I did...
Want To Dim Your LEDs with a TRIAC Dimmer? – Circuit Schematic
Want To Dim Your LEDs with a TRIAC Dimmer?
LEDs simply react a lot faster than conventional bulbs Light dimmers for common bulb based lighting have been around for ages. The most common implementation of...
How Compact Fluorescent Lamps Work and How to Dim Them – Circuit Schematic
How Compact Fluorescent Lamps Work and How to Dim Them
Dimming function opens up a completely new family of CFL applications Compact fluorescent lamps (CFLs) are replacing incandescent light bulbs at a rapid rate du...
Driver and LED Companies must Work Together to Achieve High-Efficiency – Circuit Schematic
Driver and LED Companies must Work Together to Achieve High-Efficiency
The story of a PAR 38 LED spotlight design Delivering real-world LED lighting systems that live up to their billing reduced power consumption, increased life, i...
A Better Shade of Green – Circuit Schematic
A Better Shade of Green
A Simple yet Versatile Dimming-Ballast Solution for Low-Energy Lighting EU-wide legislation promoting use of Compact Fluorescent lamps (CFLs) in place of incand...
led driving techniques reduce power in lcd tvs – Circuit Schematic
led driving techniques reduce power in lcd tvs
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Compact Fluorescent Lamps How To Dim Them – Circuit Schematic
Compact Fluorescent Lamps How To Dim Them
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Light that screen! – Circuit Schematic
Light that screen!
The circuit being very simple, this project can be used as a first NXT hardware hack. A white LED (D1) is powered through a 150 ohm resistor (R1) by the 4. 3V N...
LED Fade-In Fade-Out Dimmer – Circuit Schematic
LED Fade-In Fade-Out Dimmer
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Compact fluorescent lamp – Circuit Schematic
Compact fluorescent lamp
Compact fluorescent lamps have some benefits in comparison with classic light bulbs. It is lower power consumption (to 80%) and much longer lifetime (5 to 15 ti...
led interfacing with avr primer – Circuit Schematic
led interfacing with avr primer
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