Month: April 2006

Build an I-mic

Build an I-mic

Michael writes – “I remember building this impressive microphone myself a few years back. A great low-cost harmonica microphone built from secondhand stuff anyone can find in their local supermarket plus a few components that can be found in any electronics shop. At the worst the parts should cost around $8.” – Link.

LED scrolling marquee sign

LED scrolling marquee sign

LED555 writes – “The project is an LED sign. The LED sign is a sign made up of 512 individual LEDs, which has RS-232 communication capabilities used for programming user defined messages. The brain is a PICmicro 16F786 microcontroller, programmed in PICBasic. Everything in this project is either hand made or special order made. The […]

 Fisheye digital imaging

$20 Fisheye digital imaging

HG writes – “The concept of a low-cost fisheye digital camera is very appealing. Unfortunately, fisheye lenses still carry the price premiums associated with limited market “specialty” item status. This paper describes how a commodity door peephole can be used as a fisheye converter lens, thus bringing the total parts cost of a serviceable digital […]

Make a 9v LED lamp

Make a 9v LED lamp

Chris writes – “P.O. got so excited by all the responses from the TicTac flashlight project that he sent us another of his creations. This time it’s a LED lamp created from the scraps of an old 9v battery and three LED’s. No need to use a resistor here as he’s used three 3.5v LED’s […]