13 Apr, 2006

What's this? Twin Picaxes? Is this Stan's idea of an April Fools Day Joke? Maybe he's just seeing double . . .

3 Apr, 2007

Sorting out customer A/V installations

6 Apr, 2007

If you've never built a radio receiver, then a crystal set is a great place to start. Here's a design that's very easy to build and get going.

9 Apr, 2007

SPLat Controls, an Australian company that produces a range of home-grown industrial-strength controllers, recently added the credit-card sized 'CC16' to their line-up. This new controller sells for less than $100 yet includes many of the features of SPLat's more sophisticated controllers.

12 Apr, 2007

Banning incandescent lamps will have negligible effect on greenhouse gases

15 Apr, 2007

This reversible DC motor speed controller uses a switchmode Mosfet bridge circuit that drives the motor. It can be controlled by a 1-2ms pulse train from a radio control system or by a single potentiometer to give forward/reverse throttle control. It can operate from 12V or 24V batteries at currents up to 20A with just four Mosfets in the bridge circuit.

20 Apr, 2007

In February 2007, Malcolm Turnbull, Federal Minister for the Environment and Water Resources, announced that incandescent light bulbs would be phased out and replaced by more efficient lights such as the compact fluorescent light. Superficially, it seems like a good idea but closer examination shows that there would be substantial drawbacks.

21 Apr, 2007

High voltage displays have always been awe-inspiring. They not only look and sound spectacular - they even have a pungent smell, caused by the ozone which is generated by any high voltage discharge. One of the most fascinating high voltage displays is the Jacob's Ladder, in which a series of sparks continually climb between two vertical wires.

26 Apr, 2007

Last month, we published the circuit for our new GPS-Based Frequency Reference and described how it works. This month, we show you how to build and adjust it.

30 Apr, 2007

There are six versions to build; you choose the one suit your car's ignition pick-up system. Here's how to build the various modules.

30 Apr, 2007