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Two-wire Lamp Flasher – Circuit Schematic
Two-wire Lamp Flasher
Ideal to operate 3 to 24V DC existing on-circuit lamps LED operation is also possible. This circuit was designed to provide that continuous light lamps already...
Flashing Lamps – Circuit Schematic
Flashing Lamps
This circuit is intended as a reliable replacement to thermally-activated switches used for Christmas tree lamp-flashing. The device formed by Q1, Q2 and relate...
disco lighting – Circuit Schematic
disco lighting
This project is intended for controlling mains powered disco lighting, although there are many other possible uses for controlling almost any mains appliance. I...
Supply Voltage Indicator – Circuit Schematic
Supply Voltage Indicator
A novel supply voltage monitor which uses a LED to show the status of a power supply. This simple and slightly odd circuit can clearly show the level of the sup...
Neon Desk lamp – Circuit Schematic
Neon Desk lamp
The circuit is based on IC1, which is a 555 timer IC in astable mode. It will power a 6 inch 4 Watt fluorescent tube off a 12 volt supply, consuming 300 mA. It ...
Knightrider lights for model cars – Circuit Schematic
Knightrider lights for model cars
This simple circuit drives 6 LEDs in `Knightrider scanner mode`. Power consumption depends mainly on the type of LEDs used if you use a 7555 (555 CMOS version)....
Stereo VU Meter – Circuit Schematic
Stereo VU Meter
This is it. It`s a STEREO LED LEVEL METER. It`s the cheapest and best bar graph display available and best of all, it uses readily available components. You o...
KNIGHT RIDER lights – Circuit Schematic
KNIGHT RIDER lights
The circuit consists of two building blocks. The first is a square wave oscillator made up of two transistors in a multivibrator arrangement and the second is a...
LED Flashing circuits – Circuit Schematic
LED Flashing circuits
This is a very simple project using a printed circuit board and 8 components. It will flash an ordinary 3mm or 5mm (1/8" or 1/4") LED at a rate of about one fla...
Flashing Flashlight – Circuit Schematic
Flashing Flashlight
Pretty nice design for a cheap consumer grade flashlight. The power switch was not exactly as shown since there was an option to have the lamp on solid....
LED or bulb flickers – Circuit Schematic
LED or bulb flickers
This may well be the world`s only discreet logic circuit to generate truely random output. It makes an excellent candle flicker light for your haloween pumpkin,...
Color Organ Light – Circuit Schematic
Color Organ Light
This circuit works REALLY well. Notice how it will fire even in complete silence. This provides a sort of automatic gain control....
Incandescent LED Circuit – Circuit Schematic
Incandescent LED Circuit
This circuit when used with a 555 timer will cause light emitting diodes to turn on and off more slowly. This will make the LEDs appear similar to incandescent ...
Current Regulators For LEDs – Circuit Schematic
Current Regulators For LEDs
The following are current regulator circuits that can be used to drive light emitting diodes. As always, take time to do some testing before attempting to use t...
Colour Shifting LED`s – Circuit Schematic
Colour Shifting LED`s
These circuits provide a means of altering the YELLOW output of RED / GREEN type two colour light emitting diodes. These circuits use the LM555 timer chip....
Night Light Saver – Circuit Schematic
Night Light Saver
The Saver V5.0 runs simple clock emulation program, turns a night light on and off with preset time, say 19:00 to 22:00 everyday. The design features low cost, ...
Battery Operated LED Lantern – Circuit Schematic
Battery Operated LED Lantern
Photo. This is the test circuit -the basic driver is only two transistors, two resistors, the circuit was evaluated using a white LED, but when it was time to b...
White LED Stroboscope – Circuit Schematic
White LED Stroboscope
Finally, white LED`s are bright enough to use in a practical stroboscope. This circuit can operate as a bench-top stroboscope that, in conjunction with an oscil...
Single and Two Cell White LED Drivers – Circuit Schematic
Single and Two Cell White LED Drivers
The operating voltage of white LEDs coupled with my emotional need for low cost for a given function, motivates me to make LED drivers suitable for battery oper...
White LED Drive Circuit – Circuit Schematic
White LED Drive Circuit
A minimum number of parts yields a compact switching converter that can provide sufficient voltage to drive white LEDs. The resulting lamp is much more efficien...