This project slightly modifies the Google Android sample app called "Bluetooth Chat" so you can type a message in the Android app and that same message will appear on an LCD attached to an Arduino Uno.   Source: circuit_breaker

Long jealously kept electricity scheme for testing electrolytic capacitors, finally the pages of the Emitters.ESR-meter (Electrolytic serial resistance), an electronic instrument for measuring the degree of freshness (dry) of electrolyte fluid in capacitors, without dislocation of the experimental component of the printed plate.The device is built in miniature version on the two PCB, in addition [...]

This transmitter design is usually attributed to Japanese multimedia artist Tetsuo Kogawa. It takes audio input via 1 / 4 “phono jack, and built as shown, without additional antenna connection, will emit a radio signal about 30 feet.This is a standard model Mr Kogawa is the simplest FM transmitter, which is slightly more complex than [...]

After having seen so many propeller clockPOV videos on Youtube, but no real description of how they work or how to build your own, Chris made one also and documents how it was built. The Pyro Propeller Clock POV design criteria was short and sweet: be as simple as possible in order to encourage others [...]

This device captures the IP address of your network and it publish on site DynDNS.com. All without PC.  It allow a remote access to your LAN even if the IP address of the connections changes. If you don’t want to use the software provided by DynDNS, and then leave the PC switched on continuously, the [...]

Jaroslaw Lupinski designed Senpai (Extra Shield for Arduino Programming Nimble) shield to be easy to program AVR microcontrollers using Arduino.     [via]  

Laptop batteries can be repaired but such work only makes economical sense for smaller operators.The success rate varies with battery type.One must remember that the ‘smart’ battery consists of two parts, the chemical cells and the digital circuit.In some cases, the chemical part can be fully restored but the fuel gauge may become inaccurate or [...]

This “Tupperware Turret” is a highly modified airsoft pistol put onto a pan and tilt platform with a turret cover. It rotates, tilts up and down and has precise fire control. Control is done wirelessly with a generic TV remote control. Source: Chris

DorkbotPDX has made good project, Mykle called him for RGB LED lighting help and he helped Mykle for his lightbar. The basic idea was run all 3 LEDs in series. He ordered a few ASMT-MT00′s and other parts, and came up with a somewhat unconventional design.The ASMT-MT00 nicely provides each LED separately on 6 pins, [...]

Chris from pyroelectro  has made AV Test Box. This Box  includes displaying an 800×600 VGA test pattern as well as generating sound signals for testing audio systems. This video will you show what you can expect from this AV test box like the one built in this project and will show how quickly whether or [...]

Nice project from Petar , he send me some photos of his UV Box. This UV LED Exposure Box was published in the magazine Emiter, and here’s what the author says on this project. My UV box contains 54 ultraviolet 5mm LED distributed in a matrix of 9X6 leds.The box can enlighten board with maximum [...]