Also, sorry about the errors. Let's get this one right before GH-122 hits fiberglass and copper!
- Ron | samwisekoi
Glad I could be helpful.
While I wait the transistors to arrive, I think I'll wire up the power side of the LED matrix and find some standoffs (I did decide to go for the underside teensy for now, mostly because all my teensies have pins on them already from PJRC and I don't feel like desoldering them).
Also backlighting still needs to be worked out.
As of now, there are only two pins connected to LEDs
One is the "num" pin (labelled B4 on the teensy), connected through a transistor to a single LED, and the "WASD" pin (D7 on the teensy) connected through a transistor to the WASD keys as well as the one to the left of "a and to the right of D.
Or otherwise keys (3,3) (4,1) (4,2) (4,3) (4,4) and (4,5) are powered from the "wasd" pin.
If you flip it, that corresponds to keys (3,9) (4,11) (4,10) (4,9) (4,8) and (4,7) on the back.
You shoudl be able to drive that transistor with a normal PWM signal, as long as the frequency isn't over the transistors max rating (125 MHz for the ones I got).
In the current revision, the "LED1" and "LED2" pins (B5 and B6 on the teensy) are no longer connected to anything.