Update:
I just got the boards in today and the 2x20 pin with all grounds on one side is working great.
Very clean signals from the MUXs.
Thanks everyone for your help.
Ah! Thank you. I just added that third regulator.
Knocked them down to ~100uF.
I decided to put a voltage divider on the mute circuit based on this guy's recommendation. He says it provides muting as...
Here's my attempt at building a PCM5102A into the board with a Teensy 4.1.
I think I have the Teensy pins correct, but I need to buy a pre-made board and double check it before printing this one. Any thoughts or...
Huh. I wouldn't have thought of using GPIOs as extra grounds. My current ground is just running from the voltage regulator.
What exactly would using the GPIO's ground accomplish? In general is it better to bias...
Thanks, Mark.
OK, so perhaps I just need to intersperse ground signals and logic signals and all will be good.
I don't think the signals will be particularly fast. I'll probably poll the MUXs about 4x/sec.
...
Hey all,
I’m starting to lay out PCBs for a Teensy synth and I wanted to see if I have a fundamental flaw in my design before I get too far. Any advice would be greatly appreciated. Here are the details:
The...
OK, great! Thanks for weighing in, Paul.
I guess I'm just confused on what's going on with a breakout board like the one that PaulS linked. (The other PaulS.). If I can connect the PCM1502A with just I2S and three...
Sounds great! Any ideas where I could look to find a proper schematic to use a PCM5102A with a Teensy? I'm hoping to integrate it into the PCB instead of buying a breakout board.
Hi Teensyers,
I'm building a Teensy poly synth and would like to figure out how to build out my own DAC hardware. Here's a pic of the prototype board. Currently using the Audio Board, which honestly works great, but...
Sorry for the delayed response.
I think that a relay (or pair of relays) is the only way I can conceptualize getting the PTT to work. Thanks for that idea. I'm not really well-versed in analog electronics, so I'll...
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