Newbe with All in one 6 digit - editing firmware help

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2 months 2 weeks ago #11240 by Ty_Eeberfest

LabGnome wrote: So what i have been able to figure out by process of elimination is that pin positions 2 and 13 are not addressed for IN-14 tubes - but these positions on the board are where digits 0 and 1 have pins on the IN-16 tubes. Seems that these cannot be addressed in the code?


Correct. I take it you've been looking at the table on Page 19 of the construction manual and comparing to the IN-16 data sheet. Bottom line here is "you can't do that". The board is incompatible with IN-16 uless you want to start cutting traces and adding bodge wires.

If you were instead using a Classic board it would be simply a matter of wiring and/or a few code edits.

Look into it later when the dust is clearing off the crater.

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2 months 2 weeks ago #11241 by Ian
On the IN-14, pins 2 and 13 are skipped, and on the IN-16, pins 5 and 10 are skipped. However, the important thing that I take away from the data sheets is that pin1 is the anode, and that is at the back of the tube.

So, if my calculations are correct, this might be a strategy:

IN-16 pin goes to IN-14 PCB location:
1 -> 1
2 -> 3
3 -> 4
4 -> 5
5 -> skip (bend out to the side until tested, snip later)
6 -> 6
7 -> 7
8 -> 8
9 -> 9
10 -> skip (bend out to the side until tested, snip later)
11 -> 10
12 -> 11
13 -> 12

Cathode mapping
2 - Cathode 1 (was 1)
3 - Cathode 7 (was 2)
4 - Cathode 3 (was 3)
5 - Decimal point Left
6 - Cathode 4 (was 4)
7 - Cathode 5 (was 5)
8 - Cathode 6 (was 6)
9 - Cathode 2 (was 7)
10 - Decimal point right
11 - Cathode 8 (was 8)
12 - Cathode 9 (was 9)
13 - Cathode 0 (was 0)

This amounts to the fact that the three pins next to the Anode at the back are shifted by 1 hole. This should leave just digits "2" and "7" switched.

Attachments:

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2 months 2 weeks ago #11242 by LabGnome
Ian - this is what I ended up doing - was not pretty for some tubes that i already had in place but it will be hidden.

Thank you guys for all the help!

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2 months 2 weeks ago #11243 by Ty_Eeberfest
Okay, I guess I need to retract my "you can't do that" remark. The solution you guys came up with is roughly equivalent to my "adding bodge wires" though.

Look into it later when the dust is clearing off the crater.

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2 months 2 weeks ago #11244 by Ian
I had in my mind as well that it was practically impossible, or at best just plain ugly.

But then, because it was Sunday morning and I wasn't really into the day yet, I started pulling up pin outs to have a poke around. Once I saw that the anode was at the back, the rest seemed possible, so then I mapped it out and it became easy. Every now and again, one turns out easier than you thought. Every now and again...

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2 months 1 week ago #11250 by Ty_Eeberfest
I'm so accustomed to tubes with pins that I didn't even think about scrambling tube leads.

Look into it later when the dust is clearing off the crater.

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