A few time ago I decided to create a media center box to replace my DVD player, sattelite receiver, VCR and my kid`s Play Station 2, toone device. So, I made a core 2 duo processor system that actually replaced with succeed, all my electronic devices. The only thing that was missing was a remote control to switchOn/Off my Media Center. After I sea
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rched on the net to buy a complete remote control system, I saw that the price was a little bit high (about 90euros). I checked my stuff to find my old 7-in-one remote control that I hadbought 2 years ago and Istarted to build my own remote control receiver circuit. I focused onATtiny13 microcontroller because of its small size and its RAM in case Iwould like to rebuild the source code in C language. After a second thought, Idecided to build a completely remote control receiver that it could handle both On/Off and windows or program commands. I searched again on the net and Ifound an old version of Girder 3. 2. 9that was freeware. I went atplug-in settingsand I made a few tests to see which plug-in is the easiest to be handled via RS-232 port. I chose the "Creative infra RS232" hardware type under "UIR/IRman/IRA/CTInfra/Hollywood+" plug-in. This plug-in is receiving up to 6 bytes from serial port with 2400 bps (Bits Per Second) making it ideal for my purpose. The circuit consists of ordinary components (except of ATtiny13 in some cases). The IC1 is an infrared receiver at 30 kHz. The T2 makes the switchOn/Off of Media Center when it getsa High level by IC2. The K2 is connected tothe "Power-ON switch" connector of your PC`s mainboard (motherboard). BE CAREFUL!NOT THE 220V AC power connector. The two diodes are put to make the connection of K2 to the mainboard, easy. You don`t have to worry about which polarityyou have to...
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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