Controll 12 Led From Pc
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How to connect 12 LEDs to the computer's parallel port (LPT)
At first, you need 1 led.
Find LPT port on your motherboard. Look for pin's labels.
Check numbers.
Join L! to pin " and 1#.
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^ Circuit diagram or 12 LEDs
$ou can directly connect up to 1" L!s to the LPT port. %t's &erysimple.
ome people prefer to connect only # L!s. %t's not a problem. The(ndLpt pro)ram can mana)e any *uantity of L!s from 1 to 1".
%t's time to make the follo+in) circuit. $ou can see a face of
motherboard's LPT port or !"-F Face or !"-/ ack side0 on it.
click to enlar)e
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The same circuit is made other+ise.
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^ LEDs panel e!ample
%t is a )ood day to mount the L!s to the panel.
$ou can take any dark plastic plate and drill 1" holes alon) a circle.
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$ou ha&e )ot the follo+in) &ie+.
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^ Photo session
Panel +ith 1" L!s, front side.
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ack side of this panel.
/apcircuit to the panel.
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2o+ $ou can fi3 the led.
!"-/ Connector
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!P"-C case for !"-/
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