Another Data General 6246-A
Posted: 07 Oct 2019, 20:14
I picked this up a while ago and finally got around to working on it. I've seen some others on here and thought they looked pretty cool. This one is also a Fujitsu 3rd gen leaf spring, so hopefully that means they all are. It was in pretty good shape.
Opened it up:
I desoldered the ribbon connector and traced out the matrix to wire the Teensy 2.0++. Because of the way my software is set up, I made pins 0-6 (with the diodes) the columns and pins 8-23 the rows. Pin 7 was not connected to any board traces.
I did manage to lift a pad - hence the yellow bridge wire. Can also see lifted part of pad on pin3. I'm "OK" at soldering for the most part but this board did seem a little touchier than most.
Then reattached the upper PCB and closed it up.
I did go back and wired the LEDs for lock lights, and speaker to the Teensy. I'm not sure what the speaker was originally used for but I used it to provide key beeps - with a toggle switch so I don't have to listen to it all the time!
Here's a short video of typing on it:
Also if anyone is interested, this is the matrix i came up with:
Opened it up:
I desoldered the ribbon connector and traced out the matrix to wire the Teensy 2.0++. Because of the way my software is set up, I made pins 0-6 (with the diodes) the columns and pins 8-23 the rows. Pin 7 was not connected to any board traces.
I did manage to lift a pad - hence the yellow bridge wire. Can also see lifted part of pad on pin3. I'm "OK" at soldering for the most part but this board did seem a little touchier than most.
Then reattached the upper PCB and closed it up.
I did go back and wired the LEDs for lock lights, and speaker to the Teensy. I'm not sure what the speaker was originally used for but I used it to provide key beeps - with a toggle switch so I don't have to listen to it all the time!
Here's a short video of typing on it:
Also if anyone is interested, this is the matrix i came up with: