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A circuit that converts a signal from one form to another. Analog to digital, Digital to analog, Voltage to current, Current to voltage etc. The key to understanding is the transformational properties of the circuit as opposed to just amplification or buffering.

2
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You cannot break the rules of Physics. IF it has Phase and load in only, as shown, and IF it operates a wireless receiver when it is off, to allow it to be turned on remotely, then it MUST receive e …
answered Jun 10 '12 by Russell McMahon
2
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(flyback, boost, ...) while if the core is used in the "forward mode (forward converter, push pull, ...) with the core storing magnetisation energy but not storing all the power being transferred per … applied to the output diode so it is not conducting SO the energy must be stored in the transformer SO this is a flyback converter in both cases. Note that the 5W design uses a bipolar transistor and …
answered Jul 26 '12 by Russell McMahon
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The device seems likely to be identical or similar to the "Bulletproof" - Whole body vibration plate. Appearances vary with model but a number of plates appear to use the same core. The above cited pa …
answered Dec 5 '16 by Russell McMahon
2
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See below for a circuit that will work. "RS232" serial is inherently very simple but can have a surprisingly large amount of "dark magic" added that means you are not seeing what you think you are. A …
answered May 16 '14 by Russell McMahon
2
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Super wide-range buck converter based on the VIPer16 ST AN2872 - 500 VAC / 700 VDC input Low−Cost 100 mA High−Voltage Buck and Buck−Boost Using NCP1052 ONSEMI NCP1052 - AN8098D <= 700 V in … drop between the panel low voltage end and the battery or load. An energy harvesting IC or a custom boost converter running from a fraction of a volt would be able to provide the energy you need …
answered Jul 3 '14 by Russell McMahon
2
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THE VOLTAGES INVOLVED IN THIS SORT OF SYSTEM CAN EASILY KILL YOU. ALL PARTS OF THE SYSTEM INCLUDING THE LOW VOLTAGE OUTPUT MUST BE REGARDED AS ALWAYS BEING AT MAINS POTENTIAL. A converter of this …
answered Jan 10 '15 by Russell McMahon
2
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The circuit that you provide seems not as straight forward as many you will find and has the disadvantages of both having a transformer AND being non-isolated. What is your application? Whay do youi …
answered Apr 12 '15 by Russell McMahon
4
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rms converter as per here will produce a large number of references . Just to open up the mental filters - you can use thermistors and "ordinary" opamps as the heart of an RMS … converter as seen here. And to carry this to extremes [tm] the LT1088 integrates two heaters and temperature driven diodes in an IC package and provides an RMS converter with a 3dB bandwidth of 300 MHz …
answered Mar 6 '12 by Russell McMahon