Amrit Bir Tiwana (23)

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| Pop music and light effects are inseparable. The circuits that make the effects possible vary from simple to camp lex. The circuit presen...

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| A type 555 timer and some passive components can provide a small converter to provide a negative output of 12 V at a few milliamperes.

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| The tester in the diagram can be used to test virtually any kind of semiconductor device, ranging from switching diodes to power transis...