How to connect 12 LEDs to the computer's parallel port (LPT)
Content
Facilities for LED
Circuit diagram
Panel example
Photos
BIOS settings
^ Facilities for LED
At first, you need 1 led.
Find LPT port on your motherboard. Look for pin's labels.
Check numbers.
Join LED to pin 2 and 18.
Now You can use WndLpt to control this LED.
^ Circuit diagram for 12 LEDs
You can directly connect up to 12 LEDs to the LPT port. It's very simple.
Some people prefer to connect only 8 LEDs. It's not a problem. The WndLpt program can manage any quantity of LEDs from 1 to 12.
It's time to make the following circuit. You can see a face of motherboard's LPT port or DB25F Face (or DB25M Back side) on it.
click to enlarge
The same circuit is made otherwise.
^ LEDs panel example
It is a good day to mount the LEDs to the panel.
You can take any dark plastic plate and drill 12 holes along a circle.
You have got the following view.
^ Photo session
Hole
 |
Led
 |
Panel with 12 LEDs, front side.
Back side of this panel.
Map-circuit to the panel.
How You can fix the led.
DB-25M Connector
DP-25C case for DB-25M
Connection of DP-25C with DB-25M
Male connector for LPT port (DP-25C and DB-25M)
Night
^ BIOS settings — only if LEDs glow with low brightness level
Enter to the BIOS. Set this parameters:
[Integrated Peripherals]
Onboard Parallel Port = Enabled or 0x378h
Parallel Port Mode = EPP
Select Save & Exit Setup and press Y.
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