7i76E to VFD
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23 Jun 2017 12:37 - 23 Jun 2017 12:39 #94831
by andypugh
Here is a diagram. I think it ought to work.
Replied by andypugh on topic 7i76E to VFD
Here is a diagram. I think it ought to work.
Last edit: 23 Jun 2017 12:39 by andypugh.
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23 Jun 2017 12:45 #94832
by tecno
Replied by tecno on topic 7i76E to VFD
Thanks, will make a PCB layout or just make one on a lab-pcb.
Cheers
Bengt
Cheers
Bengt
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23 Jun 2017 12:54 #94835
by andypugh
Replied by andypugh on topic 7i76E to VFD
How different in layout is the existing PCB? Perhaps you can just jumper / cut some tracks?
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23 Jun 2017 12:55 #94836
by tecno
Replied by tecno on topic 7i76E to VFD
Have to get the board up and have a look, probably easy modification to do.
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23 Jun 2017 14:40 #94844
by tecno
Fairly easy modification, above is how the board is now.
Replied by tecno on topic 7i76E to VFD
Fairly easy modification, above is how the board is now.
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23 Jun 2017 15:09 #94847
by andypugh
Replied by andypugh on topic 7i76E to VFD
I showed the relay coils high-side switched, but low-side switched like you have will work fine, so that bit can stay the same. (you need to switch polarity of the Mesa output, is all)
A bit of cutting and jumpering looks necessary on the relay contacts.
A bit of cutting and jumpering looks necessary on the relay contacts.
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23 Jun 2017 15:14 #94848
by tecno
I was going to do like this, should be OK?
Replied by tecno on topic 7i76E to VFD
I was going to do like this, should be OK?
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23 Jun 2017 15:17 #94849
by andypugh
Should be, if the relays work reliably at 10V.
Replied by andypugh on topic 7i76E to VFD
I was going to do like this, should be OK?
Should be, if the relays work reliably at 10V.
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23 Jun 2017 15:20 #94850
by tecno
Replied by tecno on topic 7i76E to VFD
Will do a test again, if I recall it right they did.
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23 Jun 2017 15:36 - 23 Jun 2017 16:07 #94852
by tecno
Replied by tecno on topic 7i76E to VFD
No problems at 10V so I hope 10E output is somewhat near that, but they work on the bench at about 8V.
Also well within 10E permissible load of 10mA on the VFD
Also well within 10E permissible load of 10mA on the VFD
Last edit: 23 Jun 2017 16:07 by tecno.
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