I have a Raspberry Pi 4. I want to add a “PiRelay V2 - Relay Board for Raspberry Pi” and an “Adafruit Capacitive Touch HAT for Raspberry Pi - Mini Kit - MPR121”; are these stackable? What header(s) would I need to include in the order? What spacer, nuts and bolts? What connectors would I need to connect to the Capacitive Tough HAT? Regards, Paul
Looks like that PiRelay HAT uses the pins above.
Your first port of call for pin usage should be Pinout.xyz, they have almost everything!
Looks like you won’t have any trouble with conflicting pins.
As for mechanical stacking, I’d recommend picking up an extra tall header or two to clear those chunky relays:
And some M2.5 hardware to keep everything lined up:
Thanks James84823, that is a really helpful response