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Cordless Power Tool Charger Controller
23 December 2006
Protect your investment and extend the life of your power tool rechargable batteries. Add this power tool charge controller and never cook a nicad again!
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Bringing a dead cordless drill back to life
21 December 2006
Do you have cordless drills or other battery-powered tools lying unloved and unused because their batteries have failed? Don't do the usual and buy another one because they're so cheap: think of the planet and resurrect the
ones you have! And then build our
new power tool charger to really
care for your
batteries!
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A Heartbeat CPR Training Beeper
20 December 2006
During mid-2006, Australian emergency health care providers and first aid bodies largely fell into line with the Australian Resuscitation Council guidelines for the delivery method and timing of cardio-pulmonary resuscitation - or CPR. Here's a low-cost trainer which provides audible beats to get the timing right.
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Vintage Radio
19 December 2006
Developed during the 1960s, hybrid car radios combined a valve front-end with an audio output stage based on germanium transistors. They quickly replaced valve-based designs with vibrator power supplies but were themselves made obsolete within a few years.
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Salvage It!
18 December 2006
You've got to be extremely careful with microwave ovens - even a "dead" one can kill you! Here's how to render it safe and salvage some very useful parts.
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PICAXE Netserver - Pt.4
16 December 2006
Last month, we showed you how to use the PICAXE Net Server (PNS) to control a motor and monitor a switch in a pet feeder via the Internet. As promised, this month we look at a more sophisticated monitoring system.
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Serviceman's Log
15 December 2006
Imagine watching a TV set that's now 50 years old - one that was made long before the introduction of colour TV in Australia! Of course, this particular set has had a few repairs during those 50 years.
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Build A Radar Speed Gun, Pt.2
13 December 2006
Last month, we unveiled our new low-cost microwave Doppler Radar Speed Gun, designed for measuring the speed of cars, bikes, boats, horses and even human sprinters. This month, we show you how to build it and describe how it is used.
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