01 November 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.

01 November 2007

Want to make good-quality audio recordings in your own home? All you need is a PC, a hifi system, a good-quality microphone and some software.

01 November 2007

This all started out when a reader sent us a link to an item being offered on eBay. He wanted to know if the claims were true: could this little device really save money by reducing the amount of power used by your electrical appliances? Have Newton, Ohm, Kirchoff, Thevenin et al been wrong all along?

27 October 2007

Last month we introduced our new Rain and Temperature-Measuring Weather Station, with all the electronics. This month we get into the nitty-gritty of building it - all the mechanical detail and then actual contstruction.

24 October 2007

22 October 2007

20 October 2007

CD players are now relatively expensive so are there any compromises in using a cheap DVD player instead? We collected a bunch of players and put them through their paces to find out.

10 October 2007

A versatile PIC-based logic probe that fits inside a Biro case!

09 October 2007

Ideal for keyless entry for doors in cars, homes & industry, this Keyless Entry System features a rolling code to ensure high security. It also has two door-strike outputs, an alarm system & provision to use up to 16 separate keyfob transmitters with the same receiver.

07 October 2007

Noughts and crosses may rate quite poorly amongst young gamers of today but in the late 1960s, a machine, more often called an electronic brain than a computer, playing noughts and crosses against a human opponent, was quite a sensation.