View Full Version : any plans to build a parallel port

12-02-2010, 12:13 AM
Hi. I am looking for plans to build my own parallel port relay, if anyone has some plans or have a list and diangram on building one would sure be helpful thankyou

12-02-2010, 12:19 AM
I used a system my first year and Olsen type controller. If it is not for turning on lights then Olsen might not work.

12-02-2010, 12:28 AM
Sounds like you are looking for something you can build at home. The only one I'm aware of here is the Olsen 595.

There's a file posted in the files section. This is an older design, but it was many started with. A Parallel Port-based on/off controller.


Are you looking for a true Mechanical Relay setup? Those are certainly around. The above board is setup to use standard 4 Channel SSRs. If you are looking for a Relay style controller, I would simply google it. You will find a ton. I also remember there being some parallel port designs on ComputerChristmas.com.

12-02-2010, 12:41 AM
Try Velleman -- they make a lot of easy-to-assemble relays that are also very expensive. For example, if you're looking for a really small, 4-channel unit that could be controlled with a parallel port, here you go. It's probably about $25 or so. This unit would be good for lights, but not good for controlling anything with a motor. But you can look around the Velleman site and find a lot of cool stuff.


And here's a link to their 4-channel mechanical relay kit, which could possibly be controlled from a parallel port: