Revised mixer
I'm going to hand-wire this on a proto board before going to PCB because I can't wait for a PCB, it's nice and easy and regular (no buses!), and I want to make sure I've got the analog bit right. And I have a good half dozen proto boards I need to use up (which were all of 40p each if memory serves), so 2 birds, one stone, KILL KILL KILL. etc.
But even so, I have to assume I'll be firing off a run of the PCB soon, and with that in mind I definitely couldn't trust the 3.5mm connector I had previously designed in, from the Eagle catalog, and IIRC also in the Ladyadafruit catalog. "Couldn't trust" meaning it wasn't clear to me at all if the connectors I could find on line were the same as the footprint in Eagle, and I cannot be arsed and do not have the time to learn the allegedly arcane and impenetrable Eagel component editing thing.
So I've revised the PCB, to something that I can definitely trust matches the component description. But it is sadly a bigger connector, so to make room I have also had to remove the pair of RCAs on the output and use the same 3.5mm stereo jack socket there.
But this is the version I'm going to be hand-wiring, in half-hour bursts over the next couple of weeks. Can't start yet, I need the components to arrive first.
Revised mixer
I'm going to hand-wire this on a proto board before going to PCB because I can't wait for a PCB, it's nice and easy and regular (no buses!), and I want to make sure I've got the analog bit right. And I have a good half dozen proto boards I need to use up (which were all of 40p each if memory serves), so 2 birds, one stone, KILL KILL KILL. etc.
But even so, I have to assume I'll be firing off a run of the PCB soon, and with that in mind I definitely couldn't trust the 3.5mm connector I had previously designed in, from the Eagle catalog, and IIRC also in the Ladyadafruit catalog. "Couldn't trust" meaning it wasn't clear to me at all if the connectors I could find on line were the same as the footprint in Eagle, and I cannot be arsed and do not have the time to learn the allegedly arcane and impenetrable Eagel component editing thing.
So I've revised the PCB, to something that I can definitely trust matches the component description. But it is sadly a bigger connector, so to make room I have also had to remove the pair of RCAs on the output and use the same 3.5mm stereo jack socket there.
But this is the version I'm going to be hand-wiring, in half-hour bursts over the next couple of weeks. Can't start yet, I need the components to arrive first.