4bit digital compass

  Here's a nifty project I found off of Hackaday - how to build your own 16 point (4bit) digital compass. Instead of using the popular 3bit Dinsmore compass the author decided to build his own.The author attached a magnet to a reflective encoding...

READ MORE - 4bit digital compass

Digital Voltmeter.

Build an inexpressive 0.1 - 199.9V LCD digital voltmeter that can be easily configured as amper and temperature meter. This module is based on a popular ICL7106 IC that can measure its own voltage supply...

READ MORE - Digital Voltmeter.

Build BH1417 Stereo PLL FM Transmitter

  This is the latest BH1417 FM Transmitter design from RHOM that includes a lot of features in one small package. It comes with pre-emphasis, limiter so that the music can be transmitted at the same...

READ MORE - Build BH1417 Stereo PLL FM Transmitter

New TX200 transmitter with optional PLL and stereo encoder.

Here is the latest and greatly improved TX200 VFO/VCO FM transmitter. The most versatile transmitter to date that can be turned into high fidelity stereo PLL based 200mW FM transmitter. It is a perfect circuit for transmitting your music around the...

READ MORE - New TX200 transmitter with optional PLL and stereo encoder.

Open source MP3 player kits

Here are a couple open source MP3 player kits, PCB/schematics & source are all available - Li...

READ MORE - Open source MP3 player kits

HOW TO - Make a wireless LCD

Max is on a roll, here he show you how to make graphic LCDs go “wireless” by using ACODE-300 bluetooth modules - Li...

READ MORE - HOW TO - Make a wireless LCD

RF-Condenser microphone circuit

Here's how to make a RF-Condenser microphone circuit that's similar to a Sennheiser MKH series mic, Uwe writes - "This RF-circuit is operating at 7.68 MHz and 48 V phantom power supplied. It is tested with a large diaphragm cardioid capsule from...

READ MORE - RF-Condenser microphone circuit

HOW TO - Make a HI-FI Stereo FM transmitter

Here's how to make a high quality stereo FM transmitter - "Whether you want to create your own radio station, transmit the music around the house, or simply create a wireless link between your iPod and a receiver in your car, this transmitter will...

READ MORE - HOW TO - Make a HI-FI Stereo FM transmitter

Washing Microcontroller Timer

Did you ever face that, your washing m/c already run out the mechanical timer dial? After using for several times, the dial gir may worn out, and than it can not move anyhow.  Many washing m/c shell in the market has mechanical controlled sequence...

READ MORE - Washing Microcontroller Timer

New Schematics

USB and GLCD expansion board for 8051 SBC Victoria TAFE programmer (based on AT89C2051) Way small web server Wisp628 ISP Microchip PIC Programmer WLoader - PIC16F877 application loader / bootloader Zilog Z80 thermostat embedded web ser...

READ MORE - New Schematics