I'm recreating a Raspberry Pi project and ordered a custom Pi hat to follow their schematic. The only issue is that it doesn't have all of the information. I've emailed the creator but am yet to hear a response.
The actual schematic:
The project is here: Converting a Seeburg 3WA Wallbox into a Remote for a Modern Music Player.
I'm trying to figure out what the capacitances of C1, C2 and C7 are and where they go on the board as it's not very clear. Based on his photo of his final product, he didn't use one of those capacitors (I think it's C2). My guess is that C1 and C7 are the same.
Anyone out there to help?