30 April 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.

26 April 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.

21 April 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.

20 April 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.

15 April 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.

09 April 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.

19 March 2007

Here's one of those really handy little projects that will cost very little but make life a whole lot easier when you want to measure voltage and current at the same time.

17 March 2007

Second article completes the construction & gives the set-up procedure

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.