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
- I mounted the Piezo on another breadboard all was a bit tight.
- The power supply on the added keyboard is not connected
Breadboard and Schema through Fritzing
- I start to get the hang of Fritzing and the schema diagrams.
- I managed to keep both diagrams tidy
Schematic
