Software Support > Automated Projects
need guidance to figure circuit out for rotating monitor delay
DaOld Man:
Check out this thread:
http://forum.arcadecontrols.com/index.php/topic,72750.40.html
On page two, there is a discussion about the problem you are having.
I used a pnp transistor to disable opto isolators that I used to isolate the drive from the printer port.
looking back, this was probably over kill.
Reference my post on page two dated November 15,2007 to see a diagram I posted.
You could just as easily use this transistor to disable your drive by attaching the transistor between the drive's enable pin and +5vdc.
If the LPT output is high, no current flows to the drive enable.
But if the output is low, the transistor turns on and puts +5vdc to the drives enable pin, allowing it to run.
The very first thing Mrotate does is set all the printer port outputs to low. So this worked pretty good for me.
lowlytech:
Thanks so much for the info, that totally fixed my issue. The germanium diodes I had didn't work, but a 1n4007 diode inline like you showed works like a charm. Not really sure why my lpt port goes high on shutdown, but a fraction of a second before shutdown my monitor would start to rotate, now with this diode it kills the 298 circuit on shutdown with the power button press.
Thanks again for your time and help on this. Very glad your here on the forums.
DaOld Man:
--- Quote from: lowlytech on July 19, 2016, 07:29:35 pm ---Thanks so much for the info, that totally fixed my issue. The germanium diodes I had didn't work, but a 1n4007 diode inline like you showed works like a charm. Not really sure why my lpt port goes high on shutdown, but a fraction of a second before shutdown my monitor would start to rotate, now with this diode it kills the 298 circuit on shutdown with the power button press.
Thanks again for your time and help on this. Very glad your here on the forums.
--- End quote ---
Thanks for the kind words. Im glad it worked for you.
Have you posted your project on here (Project Announcements)? It's not mandatory of course to do so, but others might benefit, and you get the opportunity to show off your project.
Take care, and enjoy your work.
lowlytech:
I need to post the project for sure in the announcements. I have gotten so many ideas from others it's a great resource for sure. I get little snippets of time to work on the cabinet from time to time and then months will go by with no progress so I hated to post with no real cabinet of substance, but I have been documenting with pictures as I can. It is starting to take shape, so I might very soon try to post the project.
DaOld Man:
--- Quote from: lowlytech on July 19, 2016, 09:38:04 pm ---I need to post the project for sure in the announcements. I have gotten so many ideas from others it's a great resource for sure. I get little snippets of time to work on the cabinet from time to time and then months will go by with no progress so I hated to post with no real cabinet of substance, but I have been documenting with pictures as I can. It is starting to take shape, so I might very soon try to post the project.
--- End quote ---
I know all about the little snippets of time to work on projects. Understand fully.
I havent been on here in a while and hopefully didnt miss you posting your project yet. If I did let me know.
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