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June 22, 2010
A crucial failing of proximity detectors is their unreliable and tricky nature. This is where they are used to detect humans, not to speak of smaller living beings. [more]
June 22, 2010
EPROM adapter for ATMEL 89 Series Flash Microcontroller Programmer Ver 2.0 [more]
June 22, 2010
Two low voltage, low power zeners are used to control electronically the level of an audio signal. [more]
June 22, 2010
Stethoscopes are not only useful for doctors, but home mechanics, exterminators, spying and any number of other uses. Standard stethoscopes provide no amplification which limits their use. This circuit uses op-amps to greatly amplify a... [more]
June 22, 2010
This circuit is an Electronic Locker. It is controlled by a switches combination (by a code). There is a switch matrix on the door of the locker. [more]
June 22, 2010
This tester is designed to locate stray electromagnetic (EM) fields. [more]
June 22, 2010
The automatic pump controller eliminates the need for any manual switching of pumps installed for the purpose of pumping water from a reservoir to an overhead tank. [more]
June 22, 2010
Here is a device to help you locate your downed R/C sailplane in the bushes and weeds. [more]
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