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Don’t remember what changes that where done exactly for v1.08 (and I’m not checking) but one thing that was recently done was to change order of things a little so a standalone arduino works a little better. Don’t know how that would have impacted you but apparently it did.
Yes, R119/120 are on the lines and that is possible why it’s no connection. You need to measure from sound module to R119/120, then from other side of resistor to arduino D8/D9.
Start with resoldering the resistors, then move on to measure it.
Very slow, no sound, fast after disabling sound. That all points to problem with the sound board, it sends the command to play the sound but never get the “done” signal so it time out.
Did it ever work ?
Check connections around the sound board, make sure the BUSY connection is ok (see schematic).
Make sure the microsd card is properly installed.
If you remove the sound module it will probably run fast directly and the serial will say something about no sound board.
Did you get it to work ?
Looking at the schematic I see that the common thing between “L” and “O” is Row11 which comes from pin14 (one corner) on ht16k33. Row11 is also used for segment “E” on the alnum digits and that segment is the bottom right.
Since both the main and l&k board has issues the first action is to just put a solder iron on pin14 on the ht16k33 chip. I would guess that it’s not soldered properly since looking at the traces they go out from that point in different directions, one to the jumper cable and one to the LEDs on the board.
Please report what issues you found. It can be of help to anyone else who run in to similar issues.
Good you got it to work, and during this I guess you learned a lot about how things work – both electronics and software wise.
I’m curious as to the stall issue so please report back what that is all about.
So, lets go through the problems one by one;
– L103 display is not working
That means that Common on pin 18 on the digit does not have a connection to COM6/pin 8 on ht18k33. The path includes pin 24 on the jumper cable.
– Displays do not show all segments
Pretty much the same as above, just a different trace that’s broken. Identify the segment missing and look at the schematic as to what pin it is on. Then follow that pin all the way through the jumpercable to ht16k33.
– Plugboard seems not connected
You state above that p201-p203 fails regarding 5V and GND, that is why it’s not working. You need to fix that connection, see schematic for pins to connect.
– When turning to reflector mode system seems to get into a loop
Hard to guess, possible because of a short somewhere in the rotor but why only in reflector mode? The logic is pretty much the same for all the different modes.
Fix the other things first, then see if it’s still a problem and of so provide some more details.
– Slow response in run mode
How slow is “slow”? if maybe 5sec then it could be a problem with the sound board. Do you have sound? It is possible that it thinks you have a sound board and wait for the sound to finish before moving on.
Every PCB is tested during manufacturing to have the correct connections so that should be way low on the suspect list. The most common issue I seen is bad soldering to the level that the solder holes and/or traces are broken. Had to add some extra wires due to that on a board I fixed up earlier. Don’t forget to verify the soldering of pins on the arduino it self (been there, did just solder in the corners and things didn’t work to good until I soldered in the rest).
It’s a dual layer board so all traces are on the top or the bottom, nothing in the middle of the board. You have the schematics of where all connections should be or not. With that you can verify connections and add extra wires as needed.
For example, as a test you could solder two wires directly from the arduino to the pins on the ht16k33 chip and see if you get some life signs from it that way.
No one else in Netherlands that ordered a meinEnigma but that is probably not needed. Try to look up some close by electronics club and when they have meetings. I’m involved in some here in town and it does sometimes show up people with some electronic issue that they can’t solve because they don’t know any electronics.
A low resistance (<2 ohm) is normal and not a problem along a trace like that. Did just check and and on my working meinEnigma it is 1.5ohm.
For the software to find the chip it need only 4 wires to work, power, ground, A5(SCL) & A4(SDA). Now if any of those wires are shorted between each other it's of course a problem also so please verify that it's not unexpected shorts.
If you have a oscilloscope you can look at the signal on A4/A5.
I would have no problem taking a look at it if it wasn't for the shipping cost.
Any luck/progress ?
Is that missing connection on the same board or between p201 and p101 ?
Verify that the cable is ok, pin to pin on the boards (p201 to p101)
If broken on the lamp and keyboard, try to follow the track to see where it is broken.
Now when all connections except com5 & com6 works, what do you get on the serial port? Does it still complain about no chip ?