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Miscellaneous - list of circuit diagrams
The simple circuit emulates a similar conjuring trick which sells for hundreds of Pounds. The trick seems to do the almost-impossible from an electronic point of view, let alone from the point of view of common sense
author: Rev. Thomas Scarborough visits: 574 
Circuit with a variable pitch and a relatively loud 82 dB miniature piezo beeper. The circuit is very simple and can be easily assembled in half an hour
author: Tomaz Lazar - Ljubljana, Slovenia visits: 475 
This circuit will illuminate a LED if one of your telephones is in use. It should work in all countries (Including UK) that have a standing line voltage above 48 Volts DC
author: Miroslav Adzic visits: 437 
Another Circuit by Rev.Thomas Scarborough
author: Rev.Thomas Scarborough visits: 435 |
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