Arduino Starter Kit - Project 12 - Knock Lock

Knock Lock

When the piezo is pressed flat against a solid surface that can vibrate, like a wooden table top, your Arduino can sense how intense a knock is. Using this information you can check to see if a number of knocks fall in an acceptable range. In code you can track the number of knocks and see if they match your settings.

Building

1. I mounted the Piezo on another breadboard all was a bit tight. 
2. The power supply on the added keyboard is not connected

Breadboard and Schema through Fritzing

1. I start to get the hang of Fritzing and the schema diagrams.
2. I managed to keep both diagrams tidy

Schematic