And another batch of parts arrived.
Designed at: Plate & Case Builder by swillkb
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(https://s15.postimg.org/r7fa4egrf/lay.jpg)
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(https://s21.postimg.org/pyk3k70av/cpl.jpg)
And now a few questions:
Teensy 2.0 or 3.2 ?
Diodes 1N4148 ?
Do I need any more resistors ?
If T2.0, what pins used for rows and columns ?
In my case, 7 columns and 11 rows ?
You shouldn't need resistors unless you are doing LEDs. Make sure the Teensy is AVR (ie ATMega32u4) based, NOT ARM based. And make sure the number of I/O pins on the Teensy you choose is equal to or greater than the number of Rows + Columns, in your case a minimum of 18 I/O pins are required. This would not include the addition of LEDs which would require a separate pin. But in all honesty, handwired LEDs are a pain in the ass.