I'm about to order a Scroll pHAT to use with a Pi Zero, and I'm interested in knowing if there's a way to use it while still being able to use some of the GPIO pins for other purposes.
So my first question is, which GPIO pins does the Scroll pHAT actually use? I'm pretty sure it must be only a small subset of them, but I don't know which.
Assuming there are some unused pins, to my beginners' eyes there are maybe two ways I could in practice access them.
As far as I can tell from the picture of the header that is supplied with the Scroll pHAT, I won't be able to access any of the GPIO pins for other purposes. So perhaps instead of using that header, I could instead solder wires to just the contacts on the pHAT that are needed, and plug them into the corresponding pins on a header that I solder on to the Pi Zero.
If I do put a full header on the pHAT and plug it in like a normal HAT, maybe there's some sort of special header that I can use on the Pi Zero and/or the pHAT that would enable me still to access pins? For instance, is there a way to have pins sticking out on both sides of the Zero so that I can plug a HAT in on one side and still access pins on the other?
Thanks in advance and be gentle - I'm a complete beginner with soldering, Python, etc etc!