Update
Here are the files for a mostly fixed version that I modified. The WAS input LED, resistor and transistor aren’t tuned correctly yet but WAS input is working. The LEDs should be a more reasonable brightness and opto-coupler inputs are working too.
mod210824_smd-leds_mostly-fixed.pdf (75.4 KB)
Change file extension to zip
mod210824_smd-leds_mostly-fixed gerber.zip.pdf (349.2 KB)
mod210824_smd-leds_mostly-fixed_top_bom_cpl.zip.pdf (1.2 KB)
Edit:
Got the original files from m_elias.
Then unzipped, rezipped with windows (send to, and choose zip) renamed to lvmod21… and uploaded here again.
AND it is not enough just to rename the original zip file, that give same problem as above (not available/private)
lvmod210824_smd-leds_mostly-fixed_gerber.zip.pdf (352.6 KB)
lvmod210824_smd-leds_mostly-fixed_top_bom.zip.pdf (1.2 KB)
Previous post
So there are a few needed fixes 
-
The LEDs I added to show what the opto inputs are trying to pull up the Arduino’s inputs to 12volts. The Arduino’s snubbers were able to protect the inputs but the LEDs are lit all the time. So I changed the opto LED source to 5V and lowered their current limiting resistor value to 330 ohm.
-
The WAS input LED’s transistor is not tuned to be in the proper 0-5V range, it only lights up at 0-2V and it’s inverted (brightest at 0V).
-
Most of the LEDs are TOO BLOODY BRIGHT
