From the displayed patterns can be seen that the relays connected to the RB ports on the microcontroller and the RB3 – RB6.  Over MAX232 interface circuit is connected to the serial port of your PC. Command is done the program done in Visual Basic in the PC. Led6 uses LEDs for indication of incorrectly [...]

From the displayed patterns can be seen that the relays connected to the RB ports on the microcontroller and the RB0 – RB3. As the use TSOP1736 IR receiver or similar to it. Leadership is done remote control that supports the Philips RC5 standard.
Source: Milan Milovanovic

PANASONIC’S FULL HD 3D VIERA® TV NAMED WINNER OF CNET “BEST OF SHOW” AWARD AT THE 2010 INTERNATIONAL CES
Welcome to the television of the future as introduced at CES 2010. Measuring in at 152 inches, with an eight million pixel display (or 4K format to be technical) and with full 3D capabilities, the ultra-high-definition plasma [...]

This cheap and easy to build NiCd/NiMH Battery Charger is suitable for automatically charging a wide range of batteries for many applications. Proper chargers are usually expensive and cheap chargers supplied with the original equipment often incorrectly charge the cells and dramatically shorten their life. This ‘intelligent’ charger was designed for high current and rapid [...]

An oscilloscope is a type of electronic test instrument that allows signal voltages to be viewed, usually as a two-dimensional graph of one or more electrical potential differences (vertical axis) plotted as a function of time or of some other voltage (horizontal axis). Although an oscilloscope displays voltage on its vertical axis, any other quantity [...]

In this post, TechshopJim will show you how to etch a circuit board with about a tablespoon of ferric chloride etching solution and a 2 inch square sponge. You will be amazed as the exposed copper on the PCB disappears before your eyes, and your board is completely etched in a minute or less!
Source: TechshopJim

This post will show you how to make a thermometer that displays the temperature of the air. It’s not the most accurate thermometer in the world, but for this price and the fact that it was homemade…
Source:DemonDomen

This is a automatic battery charger, after completing the charge it turns off automatically. It runs on AC power but you can also run it with DC power. Its not my idea or my invention, I got it from net. After understanding the circuit I built it and it works fine. So try to built [...]

This device plugs in-line with the PS2 port and hijacks key presses. When a username is typed in, it records the following password.
Source: shawnlankton

This is a PIC based system that implemented a closed-loop PID controller for position and speed control of two DC motors. In addition, the control loop could be adjusted to induce arcs. The system was designed as a peripheral for another processor so it also had an SPI command interface that allowed it to be [...]