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 project
A Teensy-based midi controller/synth with a lot of buttons and knobs.
Technical Details
-Teensy 4.1
-About 64 pots and switches
-8 analog multiplexers (74HCT4051s)
-1 quadrature rotary encoder
This would all be divided into two PCBs and connected by an IDC cable as shown in the diagram below.
The IDC cable would be carrying the following signals:
-GND (perhaps 2 or 3 pins to ensure a good connection)
-3.3V to bias the pots
-5V to power the MUXs
-S0,S1,S2 signals to the MUXs
-Analog signals from all the MUXs
-2 signals from the encoder
The Question
If I try to run all of these signals across a short (~3”) IDC cable, am I going to run into a lot of interference and noise? It would be convenient for the design of the synth to have them on separate boards, but I’m wondering if I need to reconsider and squeeze it all on the same board.
Thanks so much for any advice. I'm always amazed at how helpful everyone is on this forum.
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 project
A Teensy-based midi controller/synth with a lot of buttons and knobs.
Technical Details
-Teensy 4.1
-About 64 pots and switches
-8 analog multiplexers (74HCT4051s)
-1 quadrature rotary encoder
This would all be divided into two PCBs and connected by an IDC cable as shown in the diagram below.
The IDC cable would be carrying the following signals:
-GND (perhaps 2 or 3 pins to ensure a good connection)
-3.3V to bias the pots
-5V to power the MUXs
-S0,S1,S2 signals to the MUXs
-Analog signals from all the MUXs
-2 signals from the encoder
The Question
If I try to run all of these signals across a short (~3”) IDC cable, am I going to run into a lot of interference and noise? It would be convenient for the design of the synth to have them on separate boards, but I’m wondering if I need to reconsider and squeeze it all on the same board.
Thanks so much for any advice. I'm always amazed at how helpful everyone is on this forum.
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