Analog voltage output 12-key pad available from SparkFun Electronics
NOTE: This product has been retired from our catalog. If you are looking for more up-to-date info, please check out some of these resources to see how other users are still hacking and improving on this product.
VKey Voltage Keypad(PRT_12080)
12 Button keypad with analog voltage output.
Design and firmware files for the VKey Voltage Keypad.
The hardware is released under Creative Commons ShareAlike 4.0 International.
The code is beerware; if you see me (or any other SparkFun employee) at the local, and you’ve found our code helpful, please buy us a round!
Distributed as-is; no warranty is given.
Author: Byron Jacquot @ SparkFun Electonics