D14-D16 wiring.

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D14-D16 wiring.

Postby 107merc » Fri Dec 29, 2017 10:04 am

V3.57 added pinouts for the 3 LED's, PAD's 1-3, which is great, no more jumpers to the LED, but also added a second Vcc source to those PADS.
V3.0 doesn't have that second source and I'm not sure I understand it's purpose. Any info appreciated.
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Re: D14-D16 wiring.

Postby jsmcortina » Fri Dec 29, 2017 10:32 am

I'm not sure I understand your question. What exactly are you trying to learn?

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Re: D14-D16 wiring.

Postby 107merc » Fri Dec 29, 2017 11:42 am

Scan-3.jpg
Scan-3.jpg (57.17 KiB) Viewed 105 times
Thanks for responding, should have included the diagram earlier. Want to re-purpose D14 to turn on a relay controlling an electric fan.
V3.0 of the MS is pretty straight forward. V3.57 added the pinout, PAD 1, so a jumper soldered to the LED was no longer necessary
you can use PAD 1. What I don't understand is the function of the second Vcc source, (circled). Thanks.
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Re: D14-D16 wiring.

Postby jsmcortina » Fri Dec 29, 2017 12:19 pm

It powers the pullup resistor so the PAD1,2,3 are 0-5V signals.

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MSEXTRA documentation at: http://www.msextra.com/doc/index.html
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Re: D14-D16 wiring.

Postby 2swe » Fri Dec 29, 2017 12:25 pm

it's not 0-5V but 0 or 5V, am I right ?
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Re: D14-D16 wiring.

Postby 107merc » Fri Dec 29, 2017 1:10 pm

0 or 5v is what I'm seeing on PAD 1. Could I remove R58 and just use that circuit as an on/off connecting
PAD 1 to SPR3 to turn my fan relay on or off depending on what parameters I set in Tuner Studio or
would that not work?? I have V3.57 so no proto board and would like to use what exists.
Again many thanks.
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Re: D14-D16 wiring.

Postby hybrid » Thu Jan 04, 2018 4:50 pm

The diodes are available as programmable on/off outputs, so yes they could be used for switching a relay as long as the relevant transistor is up to it and they aren't being used for anything else.
Do not load someone elses tune and expect it to work for you!
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