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Electromagnetic Field Probe with Meter Output
Electromagnetic Field Probe with Meter Output
June 22, 2010

This tester is designed to locate stray electromagnetic (EM) fields. [more]

Auto Heat Limiter for Soldering Iron
Auto Heat Limiter for Soldering Iron
June 22, 2010

Auto Heat Limiter for Soldering Iron [more]

Audio Perimeter Monitor
Audio Perimeter Monitor
June 22, 2010

Using a single cable such as speaker wire or doorbell cable, this circuit can be remotely positioned, for example, at the bottom of a garden or garage, and used to detect all sound in that... [more]

Air Flow Detector
Air Flow Detector
June 22, 2010

This simple circuit uses an incandescent lamp to detect airflow. With the filament exposed to air, a constant current source is used to slightly heat the filament. [more]

AC Current Monitor
AC Current Monitor
June 22, 2010

This circuit was designed to remotely monitor when a couple of electric heaters have been left on. [more]

High Temperature ALARM
High Temperature ALARM
April 23, 2010

The circuit is small regulatorof temperature, us warns for the increase of temperature. The control of temperature becomes from the thermistor TH1, that is negative factor. [more]

Photo detector
Photo detector
April 23, 2010

This circuit give low level output, when exist enough lighting, that is a detector of light. It can give, say ,command turn on somebodies lights, when fall the dark. His exit is compatible with TTL... [more]

Electronic Switch ON-OFF touch or with push button
Electronic Switch ON-OFF touch or with push button
April 23, 2010

Here we have three choices, with which we can make electronic switches that use our touch or pressing (push button). We thus exploit the very big resistance of entry, that present the gates CMOS. [more]

Touch Button
Touch Button
April 23, 2010

Is acquaintance that circuits CMOS present very big resistance of entry, thus if through this resistance it passes a small current, will be created a enough important fall of voltage, which we can exploit suitably... [more]

Light sensitive and differential temperature switch
Light sensitive and differential temperature switch
April 23, 2010

Light sensitive and differential temperature switch [more]



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