rosworms:

hi,  i'm making PAP ( final year project ),  and i need help,  my program is to control electrical appliances (such as lights and sensors) of a house across the vb 6 and parallel port ,  and I am not able to send and receive signals from more than 8 devices ,  and I need to send and receive 32 signals ,  very grateful any help, 

I don't know if you have found solution to your problem.

transmitting and receiving 32 signals via a parallel port should be a cinch (infact you can even do that with serial port that tranceives 1 bit at a time), but offcourse you need to build a circuit that serves as the Middle Man bw your PC and your devices.

You can use a combination of some logic ICs and Flip Flops(Latches) to achieve this but I advice you use microcontroller  to make it simpler and more intelligent/interesting.

N.B. You cannot have direct access to the PC Parallel Port using VB 6.0 (You need the right dll to acheive this - eg inpout32.dll). or better still, use the PC Serial Port

hope this helps,

@all,

am still Canachy, I lost my posting priviledge when trying to continue posting on this class: I had to create a new account so as to be able to continue.

Will post something latter today. Thanks for your understanding.

Chibuzor Anyagha