ELEKTRONIKA

Sunday, August 20, 2006

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 disk. Using four infrared photoreflectors he was able to read the position of the disk and thefore the magnet.

For those that aren't so clever as to create your own electric compass, the popular Devantech compass works.

Friday, August 18, 2006

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 and offers very low power consumption. Link

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 audio level, stereo encoder for stereo transmission, low pass filter that blocks any audio signals above 15KHz to prevent any RF interference, PLL circuit that provides rock solid frequency transmission which means no more frequency drift, FM oscillator and RF output buffer. Link

Thursday, August 17, 2006

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 house and yard. TX200 uses only two coils; one in the oscillator and the other one in the 200mW VHF amplifier so it should be fairly easy for anyone to build. Link