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I made this USB-MIDI motor controller shield with DC barrel jacks to simplify musical robotics and kinetic art projects. It has 12 DC outputs controlled by MIDI note messages. 5 of the 12 DC outputs can control motor speed with continuous controller messages. There are four servo outputs which...

Thanks for everyone's help! Here's some test code I came up with using (or trying to use since I don't really understand it) INPUT_DISABLE instead of INPUT. In the end, I may not use this method but I thought I'd put it here for others. // testing switching pinMode when using a contact...

You're absolutely right - I'll try to provide better information. The circuit is as manitou described it- the piezo is between PIN17 and GRD with a 1Mohm resistor between GRD and PIN17. Here's the slightly modified Knock code I'm using which works great const int ledPin = 13; // led...

I'm trying to use the "knock" example code on a Teensy 3.2. It works as expected unless I include "pinMode(knockSensor, INPUT);" in the setup in which case the pin hangs on a higher value (different every time) and does not return to 0. Ultimately I'd like to use this in a situation where a...