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December 12, 2010
Measures 10mV to 50Volt RMS in eight ranges Simply connect to your Avo-meter set @ 50uA range [more]
December 12, 2010
A simple device to indicate various levels of hot water in a tank. [more]
December 12, 2010
This circuit is useful in liquids level or proximity detection. It operates detecting the distance from the target by reflection of an infra-red beam. [more]
December 11, 2010
Stabilised tendency of catering: Vcc=12~16V Frequency of emission: 88~108MHz Consumption: 100~400mA [more]
December 11, 2010
This circuit is intended as a reliable replacement to thermally-activated switches used for Christmas tree lamp-flashing. [more]
December 11, 2010
Pressing the pushbutton of the transmitter, a sound and/or light alert is activated in the receiver. The system uses no wiring or radio frequencies: the transmitted signal is conveyed into the mains supply line. It... [more]
December 11, 2010
This unit can be useful as a short-range, single-channel remote-control. When the pushbutton in the transmitter circuit is briefly activated, the LED D1 in the receiver illuminates and an optional beeper or relay can be... [more]
December 10, 2010
The simple conjuring trick is intended to provide some enjoyment for the beginner in electronics or conjuring, and should take only an hour or two to build. [more]
December 10, 2010
This is a medium range transmitter circuit diagram. This is also improved by changing the values of the resistor. [more]
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