20W Low cost Emergency Light PCB
Here is simple circuit of a simple emergency light that can be constructed without much pain. The components of this circuit are 2 transistors, a transformer, 2...
Schematic Diagram LM3909 IC Color organ electronic project circuit
Using LM 3909 LED flasher IC, can be designed various electronic projects. As you can see in this circuit diagram, using the LM3909 LED flasher IC can be design...
Night Rider 16 Stage Bi-Directional LED Sequencer circuit
The bi-directional sequencer uses a 4 bit binary up/down counter (CD4516) and two "1 of 8 line decoders" (74HC138 or 74HCT138) to generate the popular "Night Ri...
Magic Lights
The circuit as shown in the figure employs 14 bi-colour (red and green) LEDs having three terminals each. Different dancing colour patterns are produced using t...
Fine Control Super Bright LED Pulser
Wanting to use two white LEDs, the second device must be wired across the Emitter of the transistor and negative ground with its own limiting resistor wired in ...
Bar-Mode Lights Sequencer
The terminal of R7 bearing an arrow must be connected to the desired output pin of IC2 or IC3 in order to select the number of LEDs or clusters forming the bar....
12 Volt DC Fluorescent Lamp Driver
A number of people have been unable to find the transformer needed for the Black Light project, so I looked around to see if I could find a fluorescent lamp dri...
Soft Start For Torch - Increases The Life Of Torch Bulbs
The halogen or krypton bulbs in modern torches (USA and Canada: flashlights) have a limited life and are not particularly cheap. A simple modification in the to...
Two-Position Dimmer
This super-simple dimmer consists of only two components, and it can easily be built into a mains switch. If you do this, don`t forget torst switch off the as...
Case Modding
The aesthetics of case modding` (modifying a PC`s enclosure) offer plenty of scope for debate and plenty of scope for original circuits. Low current LED indicat...
Schematics High Power LED mood Lamp PCB
In this page we will introduce a great project designed by Toon Beerten. His project named "DIY Led Mood Lamp" can become a very interesting add-on for your roo...
led noughts and crosses
Here`s a twist to the age-old game of noughts and crosses. Instead of pen and paper, it uses nine 10mm tri-colour LEDs arranged in a 3 x 3 grid. One player has ...
led chaser provides three game
This circuit is essentially a light chaser but it can also be set to provides heads or tails (Two Up) or a Dice (die). It also has a speaker to simulate the sou...
light flasher pcb
This is a very basic circuit for flashing one or more LEDS and also to alternately flash one or more LEDs. It uses a 555 timer setup as an astable multivibrator...
led thermometer pcb
You can use any LED you want for D1 - D10, however blue LEDs have a higher voltage requirement so if you want to go blue for a modern look, they may appear more...
15v led flasher version b
Circuit To squeeze even more energy from a alkaline battery cell, this circuit adds two transistors to a circuit similar to the above design to boost the effici...
solar flasher
This circuit is a single transistor flyback (Joule Thief) circuit that features a third coil. With it, flash duration and brightness is much enhanced, without r...
220 volt disco lamp circuit
This 220 Volt disco lamp circuit is not a voice switch (VOX), because this circuit is too dumb to differentiate between musical sound and human voice. This is m...
white light led driver with
Many consumer products using white light LEDs for illumination and backlighting provide gradual LED illumination at turnon and turnoff. This gradual illuminatio...
white led driver provides 64
This circuit drives as many as four white LEDs in parallel from a 3. 3V source, and adjusts the total LED current from 1mA to 106mA, in 64 steps of 1dB each. Th...