This project creates a RGB LED lit love heart which is controlled by a PIC12F683 microcontroller. I designed the project as a gift for my wife on our 15th wedding anniversary (since she puts up with my addiction to electronics I thought she deserved something in return!). The love heart is made from a 200x150x6mm sheet of plexi-glass which is cut
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and sanded to create the optical effect and then mounted on the control board. Even if you are not into microcontrollers the display can be easily adapted to show any shape (or shapes) you like; furthermore any high-intensity LEDs can be used allowing you to create a static light display using little more than some LEDs, resistors and a power source. Note: The high brightness LEDs, PWM colour mixing and the varying intensities confuse my video camera a lot and it seems that the camera is overly sensitive to blue. Despite this I hope the video gives you some idea of how the display functions; the display outputs 35 unique colours fading between each. To build this project you will need some basic tools in order to work with the plexiglass. In addition you will need a PCB (printed circuit board) which you can either make yourself, or use my supplied Eagle CAD files to order a PCB from one of the many board producers available on the Internet. The controller board circuit diagram and PCB artwork are shown below. The Eagle CAD files for these items are included with the project files so you can adapt and alter the design to your needs (as is the firmware for the PIC12F683 written in HiTech PIC C). The board works by generating 3 software PWM signals from the PIC which control the overall brightness of the red, green and blue LEDs. Since the LEDs require 30mA per led colour the circuit must be capable of sinking 90mA per colour...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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