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Electronic Circuits Zone

Electronic Circuits Zone

http://edesigncircuits.blogspot.com

Electronic Circuits Collection Resources for Electronic Projects

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  • SWR Meter Circuits #01

    Posted on Sunday March 1st, 2009 at 00:07 in swr circuits, measurement circuits

    For Everyone involved with radio transmitters needs some instruments to assess basic antenna functionality. Among these instruments, the best-known and most-used one is the Standing Wave Ratio meter. Some radio amateurs develop a cult for these littl...

  • Variable DC Power Supply 5-15V

    Posted on Friday January 2nd, 2009 at 11:26 in power supply

    This is a variable DC power supply that is similar I used to power my FM Transmitter. After suffering long problems with mains hum, this design using a pi filtered C-L-C approach. This circuit offers excellent ripple rejection. See at the above sc...

  • Uninterruptible Alarm Power Supply

    Posted on Friday January 2nd, 2009 at 11:14 in power supply, ups

    Although this Power Supply was designed for the Modular Burglar Alarm - it has other applications. It provides an output of 12-volts - at a current of up to 1-amp. In the event of a mains failure - the back-up battery takes over immediately. And when...

  • 24 VDC Power Supply with maximum Current 5 A

    Posted on Wednesday December 3rd, 2008 at 00:52 in power supply

    Here's a 24 VDC power supply circuit with voltage input 20-30 Vcc. This power supply produces voltage output 13.5 VDC maximum current 5A. The features capability of this 24 VDC power supply are protection against short circuit current, over temperat...

  • Simple Rain Detector

    Posted on Wednesday November 26th, 2008 at 19:08 in detector-sensor- alarm

    Here's a simple rain detector circuit. It uses a sensor made of a small piece of etched PC board and a simple SCR circuit to detect rain and sound a buzzer. The SCR could also be used to activate a relay, turn on a lamp, or send a signal to a securit...

  • Coil Coupled Metal Detector

    Posted on Monday November 24th, 2008 at 20:06 in test measurement

    Another metal detector circuit where coils overlap to produce tone. Position out of phase on search head. It is based on a standard transformer coupled oscillator (TCO) - hence the name Coil Coupled Operation (CCO) Metal Detector. Although requiring ...

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