15 March 2007

While its origins were in the 19th century, it is widely recognized that radio - and in particular broadcast radio - was one of the most significant developments of the 20th century.

13 March 2007

Want to program the ignition timing on your car? Now you can, with this completely new design. It can be used in older cars which presently do not have electronic ignition or used as an "interceptor" for cars with engine management systems.

11 March 2007

Need a source of very accurate 10MHz and 1MHz signals for calibrating frequency counters, radio receivers and signal generators? Here's just what you need: a frequency reference which is linked to the Global Positioning System (GPS) satellites, to take advantage of their highly accurate on-board caesium-beam "atomic clocks".

05 March 2007

Silicon. One of the Earth's most prolific substances, yet so important in our 21st century lives - from computers to disc technology - and glass.

27 February 2007

Interesting circuit ideas which we have checked but not built and tested. Contributions from readers are welcome and will be paid for at standard rates.

26 February 2007

Are you intending to build the Variable Boost Control described earlier? If so, you will need to built this simple Fuel Cut Defeater (FCD) to eliminate the standard factory fuel cut which typically occurs at boost levels about 16-17psi. The unit is not adjustable, so no external controls are required.

25 February 2007

Quite a few cars have turbochargers these days and these can provide even more performance if the turbo boost pressure is increased. However, you don't want permanently increased turbo boost as it increases wear on the engine, so you need a variable boost control, as presented here.

24 February 2007

This update of our very popular compact 50MHz Frequency Meter now has an internal battery pack or can run from a DC plugpack supply. It also incorporates a 10kHz rounding mode to enable 36MHz R/C transmitters using pulse position modulation (PPM) to be measured with an unambiguous reading.

23 February 2007

This up-to-date control module works with any universal infrared remote and features a blue LED readout and an optional rotary encoder. Its ability to both attenuate and amplify means that it can operate as a simple volume control or as a high-performance stereo preamplifier!

19 February 2007

For those people who don't want to bother with a separate turntable, a computer and software, Teac has produced a single box solution for the chore of dubbing vinyl records to CDs.