Projects in the March 1999 issue of EPE Magazine | |
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Wireless Monitoring System (Part 2) - Closing our excellent low cost 418MHz a.m. radio-linked short range data logger and monitoring system, with PC logging of recorded data.
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![]() Commercial battery-operated cupboard lights are widely available in DIY stores and by mail order from electronic component suppliers. These lamps are useful as a simple means of lighting up a cupboard or for garden sheds and other places where no mains supply exists. The one drawback is that if they are left on accidentally, the batteries are exhausted with monotonous (and expensive) regularity. This simple project provides automatic timed control of a 3V battery-powered lamp. Uses a 7555 for minimal current consumption. Ideal for beginners. |
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