1 Dec, 1999

Searching for buried treasure can be a rewarding experience - try out this metal locator next time you go prospecting or beachcombing.

1 Dec, 1999

From the time that the first successful sound systems were installed in cinemas in America, JBL Loudspeakers have been at the forefront of quality sound reproduction. As this article shows, they still are...

2 Dec, 1999

3 Dec, 1999

Want to share a single modem between several users for Internet access?

7 Dec, 1999

Microwave sulphur lamps are a relatively new innovation in the lighting industry and the concept is quite simple: use a magnetron to excite sulphur to produce a high luminous output. The lamps are commercially available and are suitable for hollow light guide applications.

8 Dec, 1999

Last month, we gave the circuit details of our new compact Speed Alarm. This month, we show you how to build it and give the installation details. We also show you how to fit the speed sensor.

10 Dec, 1999

As promised in part 2, here is the walk-around throttle version of the Railpower speed control for model railways. It uses four switches to control speed, forward/reverse, inertia and braking.

11 Dec, 1999

This handy solar panel regulator measures the voltage across your battery or the charging current and will disconnect the panel to stop overcharging. It works with 12V or 24V systems and has a 3.5-digit liquid crystal display.