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Everything posted by obbelix
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Now I have assambled all the components and it works! The LED is connected to pin 17 and all I had do to was to modify the script so if I want the LED "on" I change the "control" value that is sent to the LPT. Maybe I will make a schematics for my unit. If so, I upload it here.
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Yes! it seems to work with pin 17. Now I just have to assamble all the components. Thanks!
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Base + 1 = inputs (pin 10,11,12,13,15) Base + 2 = contol (pin 0,14,16,17) I was testing some yesterday and it seems that I could use pin 17 to control the led.. Haven't tested with a LED yet, but will do that later today.
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->harsh Do you mean as the link or the attached picture? Ok... how? is it a programming thing? - - - - - - - - - - - - - - - - ->MP Are you shure? The LCD has 14/16 pins where 10 of them are connected to the LPT (pin 1-9 + 16). Pin 10-13 + 15 of the LPT is for input. Pin 18-25 i ground. That makes only pin 14 and 17 free. But those pins are "Control"... Can I send data to, for example, pin 17 so the LED could light? - - - - - - - - - - - - - - - -
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Ok... Is there any other way to do this? If not, is it possible to have the led turned on/off with key 1/2 without the LPT do this? So, if i press "key 1" it both sends signal to LPT and maybe to an IC that turns the led on. And when "key 2" is pressed the LED goes off.
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Hi! I'm trying to build a "remote-control" to my software (written in Delphi 6) with a LCD display, some keys and a LED. What I want is: When I press a button (on my circuit) I read that value from the LPT port and start a process in my application. The application now shows some info on the LCD (via LPT) and a LED should light. And when I press another button, the process will stop and the LED goes off. The buttons and LCD is working. How I write/read to/from LPT is not a problem. It is just how I should wire the hardware so I also (with some code) can light up an LED. To light up a led without having an LCD connected at the same port is easy but because the LCD uses all the data-pins (2-9) of the LPT there is a huge problem (for me). Schematics for the LCD and buttons that I use (not made by me) : http://mitglied.lycos.de/MASE5/linux/lcdenglish/lcd-mit-tastatur-harware.html I also found the attached jpg on the web... Is this useful?