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jk electrical lighting sound systems – Circuit Schematic
jk electrical lighting sound systems
By using a relay, you shorten the distance that you must pull the thick wires (especially through the firewall and under the dash), and you reduce the need for ...
LED Modulation Circuits – Circuit Schematic
LED Modulation Circuits
Common Light Emitting Diodes (LEDs) require a DC forward bias current of 10 to 20 mA for proper operation. Typically the maximum DC current is 30 to 50 mA. The ...
LED flashlight based on a white LED – Circuit Schematic
LED flashlight based on a white LED
The JarLight is a small flashlight based on a white light emitting diode (LED). It is powered by a single battery cell. This combination enables a very compact ...
8x8x8 LED Cube – Circuit Schematic
8x8x8 LED Cube
You will need 512 properly working LEDs in the lattice. They will need to be stable and bright. This step will show you how to separate the faulty ones from the...
Solar Dark Detecting LED Light Bulb – Circuit Schematic
Solar Dark Detecting LED Light Bulb
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LED Matrix Kit – Circuit Schematic
LED Matrix Kit
A new spin on a great kit. Have you ever seen the dot-matrix displays that can display letters, numbers, or even icons Once you know the basics for how to displ...
Clock keeps on ticking – Circuit Schematic
Clock keeps on ticking
I designed and built this Ring Counter Clock in 1970. The base is a 12" diameter/2" thick block of walnut from a hollowed-out gun stock blank. The back side of ...
Sound Star KIT with 60 LEDs Microphone and Vu-Meter – Circuit Schematic
Sound Star KIT with 60 LEDs Microphone and Vu-Meter
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Mains operated led Lamp – Circuit Schematic
Mains operated led Lamp
Hi This is a 25 nos Led  operated from mains of 230v supply. I bought a flourscent lamp adapter from a scrap dealer, because its easy to disman.....
Larson Scanner with Joule Thief Circuit – Circuit Schematic
Larson Scanner with Joule Thief Circuit
D1 (Schottky diode) and C2 form a rectifier to create DC voltage out of the Joule Thief. Zener diode D2 is added to "clamp" or limit the voltage at 5. 1V to pre...
Universal High-Power LED Driver with 3D-printable Case – Circuit Schematic
Universal High-Power LED Driver with 3D-printable Case
The heart of this controller is a switch mode voltage converter. L1 converts voltage. Q1 is the switch that control current the goes through L1. The b.....
USB Blinky – Circuit Schematic
USB Blinky
My projects typically involve many LEDs and microcontrollers. However sometimes I just love the simplest of things with LEDs. One of the very basic L.....
The Super Capacitor Flashlight with Custom Charger and Voltage Booster – Circuit Schematic
The Super Capacitor Flashlight with Custom Charger and Voltage Booster
Before I begin talking about the schematic, let it be known that there are four hardware blocks to this circuit: 1) The wall transformer 2) The charge.....
Sound Synchronized LED Video Tutorial – Circuit Schematic
Sound Synchronized LED Video Tutorial
Is possible to syncronize the leds so that first, the speakers are still playing aloud, and two, the led are not always on during music playing. i pretty educat...
Small Strobe Light 555 astable multivibrator circuit – Circuit Schematic
Small Strobe Light 555 astable multivibrator circuit
I recommend breadboarding the entire circuit first. It was way easier on a breadboard that trying to figure out what goes where on a tiny piece of pr.....
Single Cell White LED Torch – Circuit Schematic
Single Cell White LED Torch
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Rotating LED Marquee Hat circuit – Circuit Schematic
Rotating LED Marquee Hat circuit
Here`s the schematic for the circuit. Solder all the components onto perfboard. Sorry the drawings kind of bad. Basically, the 555 timer sends a pulse.....
simplest light with constant-current LED circuit – Circuit Schematic
simplest light with constant-current LED circuit
Here`s a really simple and inexpensive ($1) LED driver circuit. The circuit is a constant current source, which means that it keeps the LED brightne.....
Phone line-powered flashlight – Circuit Schematic
Phone line-powered flashlight
This works in a way that the phone line won`t stay busy while the LEDs are connected and when you pick up the phone, the light goes off and allow you to use you...
Audiostrobe-compatible LED glasses – Circuit Schematic
Audiostrobe-compatible LED glasses
Audiostrobe glasses are used in conjunction with light and sound machines, as well as some brainwave entrainment software. The glasses have LEDs buil.....