01 September 2006

Don't let your tropical fish freeze or fry to death. This programmable circuit warns of out-of-range temperature conditions

13 August 2006

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.

09 August 2006

Last month, we described the features of our new Theremin and gave the full circuit details. This month, we show you how to build it and describe the adjustment procedures.

07 August 2006

Are you into PC flight simulators? Find the control your typical controllers give you just a bit less than satisfying? Take a step up: add this very simple multi-throttle controller and start flying with the big boys ...

05 August 2006

Do you have an old turntable but no RIAA inputs on your preamplifier? If so, you need this preamplifier for playback and for converting them to CD or MP3 format.

04 August 2006

It's got hands to indicate hours, minutes and seconds, plus chaser LEDs that stop and freeze at the seconds hand

23 July 2006

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.

20 July 2006

AWA B33: the ultimate Australian- made transistor portable

19 July 2006

There's lots of good bits inside junked photocopiers

18 July 2006

If you have experienced mild tingles or shocks from double insulated equipment, you will want to know how to prevent them. Here's our "Tingle Terminator": a simple solution to this vexing problem. There is no need to gain access inside the equipment and it will not void the warranty.