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Transcript
Variable Power Supply
Notes:
Using the versatile L200 voltage regulator, this power
supply has independent voltage and current limits. The
mains transformer has a 12volt, 2 amp rated secondary,
the primary winding should equal the electricity supply
in your country, which is 240V here in the UK. The 10k
control is adjusts voltage output from about 3 to 15 volts,
and the 47 ohm control is the current limit. This is 10mA
minimum and 2 amp maximum. Reaching the current
limit will reduce the output voltage to zero. Voltage and
current regulation equations can be found at this page.
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