I recently got an alarm clock from goodwill and took it apart and am probably going to use the display for some tests. Here is a picture of the front of the display:
- The text on the left is YC-60525S 3
- The text on the right is 94HB
- On the back is WS6055 L S and 0306
Here is the display schematic I made as a PDF.
You will notice that pins 23-29 were never connected to the clock's other PCB; although pins 22 and 23 are soldered together. Also worth noting is that pins 7 and 8 are never used. And lastly a, d, e, f, and g do not currently function in any sense on digit 1 (hence '1' is the only digit it can make).
My problem is that I was messing around with the unused pins on the right of the board and managed to do a couple different things.
- I duplicated the controls Pin 1 had as ground to Pin 29 (Red/Purple in the PDF).
- I moved the majority of controls Pin 2 had as ground to Pin 25, leaving only control of the 1st digit to Pin 2 (Blue/Black in the PDF).
I am unsure what did to cause the board to change its configuration. I was trying to be pretty thorough labeling the pins, and at one point I brought in a second voltage line. I would like to know why/how this occurred, but also how I can then manipulate the boards settings to my liking.