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Circuits designed by David Johnson, P.E.
Last Updated on:
Sunday, December 31, 2017 08:07 AM
List of Dave's Circuit Designs
The contents & graphics
of Discovercircuits.com are copyright protected.
LINKING to Dave's circuits is permitted but DO NOT COPY any files to your WEB
SITE server |
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More
Switches, FET circuits
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Sink to Source Universal DC Converter |
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As illustrated below, many control systems use an open
collector transistor to turn something on. Perhaps it is a LED light, a relay or
a small motor. However there are other systems which require a common
ground connection instead of a common V+ supply connection. |
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The circuit below
converts the "sink to ground" current path to a "supply source" power connection.
With the components shown, the circuit will operate over a wind 3v to 28v range with a
current up to 1 Amp. |
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Text & Graphics Copyright © of David A.
Johnson, P. E. -- ALL rights reserved, NO EXCEPTIONS! |
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Click
on Drawing Below to view PDF version of Schematic |
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