Button Pad Hookup Guide
Contributors:
Byron J.
Byron J. 
Resources and Going Further
Resources
- The complete Roland TR-808 service notes can be found at archive.org.
Going Further
- Our Serial LED Matrix uses matrix scanning techniques to address an 8x8 matrix of RGB LEDs.
- Charlieplexing is a more advanced scanning technique for driving many LEDs with very few pins. Check out this tutorial on Instructables to Multiplex with an Arduino Uno and 74HC595.
- Matrix scanning is only one way to interface a bunch of switches. This article compares and contrasts a number of different methods.