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GPS-Based Frequency Reference; Part.1
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".
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Circuit Notebook
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.
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A Fuel Cut Defeater For Cars With Variable Boost Control
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.
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Simple Variable Boost Control For Cars With Turbochargers
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.
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Low-Cost 50MHz Frequency Meter; Mk.2
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.
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Remote Volume Control & Preamplifier Module
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!
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Teac GF350 Turntable/CD Burner
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.
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Bike Computer To Digital Ammeter Conversion
13 February 2007
Electronics is just as much about adaptation as it is invention. Here Stan takes a cheap bike computer and turns it into a digital amp-hour meter with the aid of his No.1 favourite chip, the mighty Picaxe!
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