Projects in the January 2002 issue of EPE Magazine | |
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![]() This self-contained mains switch will automatically turn off mains lights after a preset interval. Has no moving parts or exposed components, it's all controlled entirely by a fingertouch on the plastic faceplate. Easy to build. |
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![]() A PSU is an essential item of test gear for every workshop, but there is no need to buy expensive commercial units when you can construct this fully-specified mains-powered design for yourself instead. It provides variable voltages from 0-20V d.c. with current limiting on ranges of 100mA to 1 Amp. Twin moving-coil meter display. |
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Teach-In 2002 (Part 3) |
Other features in this issue: New Technology Update describes "Bumpless Build-Up Layers", that squeeze more transistors into an i.c. chip; Circuit Surgery looks at the simple maths behind basic filter equations; Ingenuity Unlimited offers more readers' own circuits all this and more in Everyday Practical Electronics magazine. |
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