Hands-On Embedded Programming with C++17

Debounce HAT

Using the information and debounce circuit from the previous section, a prototype board is assembled:

This prototype implements two debounce channels for the two switches that are required by the project. It also adds a screw terminal to connect the SBC power connection to. This allows one to power the SBC via the 5V header pins instead of having to use the micro-USB connector of the Raspberry Pi. For integration purposes, it's usually easier to just run the wires directly from the power supply into a screw terminal or similar than to bodge on a micro-USB plug.

This prototype is, of course, not a proper HAT, as defined by the ...