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Ultrasonic Sensor Circuit

P. Marian - 11/04/2009

This Ultrasonic Sensor Circuit consists of a set of ultrasonic receiver and transmitter which operate at the same [...]
foxhunt fm transmitter circuit schematic

Foxhunt FM Transmitter Circuit

Received by Email - 10/09/2009

This 2 meter 144 MHz fox hunt transmitter is used in amateur competitions where a hidden transmitter is [...]
radio beacon 144 MHz

144MHz Radio Beacon Circuit

Received by Email - 10/03/2009

The transmitter on 2 meters 144 MHz was designed mainly for use by radio amateurs as radio beacon [...]
dc converter schematic

10-16V DC to 18-30V DC Converter

Received by Email - 03/06/2009

This dc to dc converter raise a dc voltage at almost a double value and is useful for [...]
musical doorbell circuit schematic

Musical Doorbell Circuit

Received by Email - 01/19/2009

In many cases, a doorbell that sounds off a musical tone is preferable over the common buzz sound. [...]
digital potentiometer circuit schematic

X9CMME Digital Potentiometer Circuit

P. Marian - 12/08/2008

Xicor's digitally controlled E²POT ICs provide ergonomic and long-lasting alternatives to mechanical potentiometers. The ICs in the X9CMME [...]
temperature alarm circuit schematic

Below Temperature Monitor with Alarm

Received by Email - 10/04/2008

This temperature monitor alarm circuit continuosly monitors the room temperature and beeps when the temperature drops below 20 [...]
preamplifier scanner circuit schematic

Audio Preamplifier Scanner Circuit

Received by Email - 06/05/2008

This circuit scan all the preamplifier entries to identify where is a audio signal and that entry remains [...]
liquid detector circuit schematic

Liquid Detector, Water Sensor Circuit

Received by Email - 04/27/2008

This is a very simple liquid detector that use a relay to open an evacuation van. You can [...]
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