Definite Parallel (LPT) relay board desing

[milika]

Have anyone got this.

With nice XOR for the reset on power on,
and all the restrictions off the new
MBs on 5v not beeing 5v solved.

I searched and searched and i think it would be nice
to have a definite article...

Thanks...

[Ricky327]

I used to think relay card on parallel port is the best design because it was easy to implement. After designing one to control a magnetic card writer, it does all sort if strange stuff when booting up the machine. Such as it will turn the motor on/off, write a bit to the card...etc. Once all is settled and I got my apps running then it behave properly.


Problem with most parallel port relay card :

Bulky, big connectors.
Will react to any software that control the port.
The POST or windows booting up can start turning the relays on or off.
Unplugging the parallel cable will reset all the relays to on or off.
Doesnt keep the state of the relay when the PC has shutdown.


Im designing a serial port version that remove all the problems with a typical parallel port design :

Anyone interested in serial controlled Relay/Input card?

Much more compact, versatile and secure.

Still working on it, hopefully to get it all done fairly soon.

[milika]

Yes, i have seen the post, but i thought you were not near completion.

Would you sell it? What whould be the price?

And one thing also, i can only send money to
bank accounts - from serbia there can be no
money order sent...

I'm startiong on desing of my app for car control
and this would make perfect add on.

Please advise on progress, we are all waiting...

Bye...

[Ricky327]

I dont intend to sell it. Im just doing it out of interest really.

I have been busy for the last 4 days so I havent touched it lately.

Sure Ill post as soon as I got some update