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Build A 6-Digit Nixie Clock, Pt.2
22 August 2007
Last month, we gave some of the history of Nixie tubes and described the design of the NX14 clock and its circuit. This month, we give the assembly details and describe the optional blue LED up-lighting which we think that most constructors will definitely want, together with the attractive see-through Perspex case.
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Circuit NoteBook
20 August 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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Subwoofer Controller
18 August 2007
Adding a subwoofer to your home theatre or hifi system is the easiest way to extend the bass response. A relatively small speaker system driven by a big amplifier can give heaps of bass while not taking up a lot of space. This new Subwoofer Controller has all the features you could want, including low and high pass filters, parametric equaliser and auto-turn on.
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Adaptive Turbo Timer
13 August 2007
If your car's turbocharger has just been running, it is vital to allow the engine to idle for a few minutes before switching off. This Adaptive Turbo Timer will do the job automatically. It only operates when necessary and sets the idle time according to how hard you've driving.
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20W Class-A Amplifier Module; Pt.3
10 August 2007
In Pt.4 this month, we present a high-performance Stereo Preamplifier & Remote Volume Control module. It's a low-noise, low-distortion design specifically engineered for the Class-A amplifier but which can also be used with other stereo power amplifiers.
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ezi-TRAK GPS/GSM-based Vehicle Tracking System
06 August 2007
The press release looked intriguing, telling of an Aussie tracking device helping to foil a car-jacking in Nigeria (see report at right). But (being the inquisitive creatures we are) we wanted to know the story behind the story. Just what is this "EziTRAK" and what makes it so special? Ross Tester explains.
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