Tired of spending hours and hours in wire soldering? Do your circuits look ugly and you are looking for a way to produce professional-like PCBs? Then you had better try photoetching. And the first step to do that is to have the right equipment that is an Automated Exposure Box. Source: Theodosiou Antonios

This project  is a stationary linear barcode scanner made from an IR emitter and an IR detector. With the project deadline only weeks away, we decided to make a linear barcode scanner with photo-detectors instead. The operation of a photo-detector is very simple. Depending on the reflectance of the scanned object, photo-detector simply outputs different [...]

The speech recognition system was capable of recognizing four commands and could cycle through a simple play list of three songs.  The jukebox could turn itself on, begin play, move between tracks, and stop play all through user voice commands. In order to implement this design, Robbins and Saha needed to combine several different hardware [...]

Our project, in one sentence, is an orientation independent 3D LED display. We were inspired by various videos on youtube of similar cubes but also by the idea of creating an interactive 3-dimensional display. We built a 5x5x5 LED cube display and controller board which interfaced the cube to a Mega32 microcontroller. We can display [...]

This circuit  Logic Probe it  indicates the logic state of the node of any TTL logic circuit. To do that, we have to supply the probe with the same power of the circuit that we want to analyse: same Vcc and same GND. To check the logic level, we must connect the “Test” wire of [...]

This revolutionary technology is making TVs brighter and more colorful over a longer period of time. Luminus LEDs used in Samsung, LG projectors Luminus Devices has announced that its PhlatLight LEDs are powering two of the newest portable LED-based projectors, the Samsung P400 pocket imager and LG Electronics’ HS-102 ultra-mobile projector. Both projectors are lamp-free, [...]

“EMITER” Macedonian magazine for popularization and application of science and technique finaly have a web page you can view on this link:  http://www.emiter.com.mk

This circuit uses a PIC16F685 and an OPA4342 (or LM324) to randomly generate pleasant audio tones. The interesting part about this project is that it’s not calculating the frequencies required to make the tones, it’s counting the time intervals. Source: Poweredbynerd

The University of Tokyo developed the “organic flash memory,” a non-volatile memory that has the same basic structure as a flash memory and is made with organic materials. The erasing and reading voltages of the new flash memory are as low as 6V and 1V, respectively. Data can be written in and erased from the [...]

This circuit  is a small thermometer with a 2×16 characters display (see HD44780 LC-Displays ) that shows the current temperature and extreme values, i.e. minimum and maximum temperature. The PCB is designed to fit behind the display so that it is possible to build up a quite small device. Download: * Eagle-project (PCB layout) C [...]

The lamp is controlled by a PIC microchip 16F628 controller and I decided to add a Sony IR remote control receiver to the design, which my brother was very kind to code in a PIC microchip 12F683 controller. I must say I am very pleased with the finished result. The 3 Watt LED module is [...]