Thread: Flasher circuit using a BD679
Brains are a feature of Mach3 software, you can get an overview here;
Spelling mistakes are not intentional, I only seem to see them some time after I've posted
The Following User Says Thank You to EddyCurrent For This Useful Post:
I had an issue with a PMDX A few months ago with prox switches on Home switches (Inputs) not being pulled to ground and the cure was a small resisistor between ground and the pin. It sounds like you are having a similiar thing so worth a try.?
Last edited by JAZZCNC; 11-07-2014 at 06:05 PM.
Jazz... close I think.....
It is now working after receiving an email from Steve @ PMDX. In his email he indicated that I needed to connect the negative from the 24v supply to GND so the transistor had a reference to it. I did that and it works. I now know why Eddy's worked from the start (at least I think I do), his BOB is powered by the same 24v supply as the flasher circuit and therefore the tx already had a reference to the 24v neg side. I am thinking now if I replaced the 24V LED with one suited more to 5v whether it would work without grounding to the supply. However, that would probably be a moot point given that I have a PMDX 126 winging its way to me as we speak and it is powered by 240v.....
Thanks to everyone who ran around in circles with this, I really appreciate the help given
And with me being a follower and not a guru in electronics I managed to completely miss that principle. Lesson learned I can tell ya because now I just feel like a wally :)
12-07-2014 #16Assumption being the mother of all F'#&up's
No 0v reference - yep, that would do it. We've all been there. Glad you're sorted.
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