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A Speed Controller For Film Projectors
20 April 2011
Do you have old family movies on film? Have you watched them lately? You may be shocked by how much they have deteriorated over the years. They need to be transferred to DVD before the film deteriorates to the point where it is unwatchable. Video conversion is not as straightforward as you might think but this simple project enables you to do it.
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Cheap'n'Simple 100V Speaker/Line Checker
18 April 2011
This Speaker/Line Checker will be a boon to
anyone setting up 100V PA systems, especially for temporary
installations at sporting events, when you need to do everything quickly before the event and be sure that it is all working. With this tester,
you can immediately check each PA speaker and line as it is run.
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Circuit Notebook
14 April 2011
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.
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Review: Agilent's InfiniiVision 4-Channel Oscilloscopes
12 April 2011
The new Agilent InfiniiVision DSO/MSO 2000X and 3000X series oscilloscopes will certainly stir up the scope market. They combine high performance and a wide screen format with ease of use something that is not always a feature of today's digital scopes.
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The Rise & Fall Of Electronics Today International
08 April 2011
40 years ago this month, a brash new electronics magazine burst onto the scene in Australia: Electronics Today - later called Electronics Today International or simply ETI. It really caused a stir and provided stiff competition to the long-established "bible", Electronics Australia.
Here is the story of how it began,
as told by ETI's founding editor,
Collyn Rivers.
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Fixing Transformer Buzz In The Class-A Amplifier
02 April 2011
Since the 20W Stereo Class-A amplifier was published in 2007, it has been widely acclaimed for its sound quality. But there has been a consistent niggle experienced by quite a few constructors low level buzz from the power transformer. We recently took a look at this problem and have come up with a cure.
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Microphone To Neck Loop Coupler For Hearing Aids
24 March 2011
Hearing-aid wearers often have difficulty understanding conversations in noisy environments, especially if they have
switched their personal hearing aid from microphone mode to T-coil mode. This projects solves that problem.
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12V 20-120W Solar Panel Simulator
22 March 2011
How do you test or develop a solar charge controller such as the unit described in SILICON CHIP last month? You could use a solar panel but then you are at the whim of the weather and time of day. Also you would need several panels of different sizes to test it properly. This device solves all those problems.
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