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Measurement Interface for Sound Card
Measurement Interface for Sound Card
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Old 20th October 2020, 07:50 AM   #71
H713 is offline H713  United States
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Interesting that they can be programmed using the Arduino IDE. I'll look into them. I think for the version 1 of this, I'm going to stick with the Arduino Nano. My first priority is to get all the analog sections ironed out and behaving the way they should.

There will certainly be a revision 2 however, and the STM32F401 may be of interest for that.

Realistically though it isn't the processing capabilities of the Atmega328 that will be a major limitation, it's the number of IO pins.

As of right now I am revising the layout around the expansion connectors, since I'm not entirely happy with the way it currently is done.
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Old 20th October 2020, 08:01 AM   #72
phofman is offline phofman  Czech Republic
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Quote:
Realistically though it isn't the processing capabilities of the Atmega328 that will be a major limitation, it's the number of IO pins.
If I count correctly the F401/411 board should give you 34 GPIOs, compared to 22 of Arduino Nano. But any port expander can solve lacking pins easily.
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Old 20th October 2020, 09:13 AM   #73
mroether is offline mroether  Germany
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Hi, maybe these could be alternative microcontrollers (25 - 46 5v I/Os) Teensy USB Development Board too. They are cheap and also easily programmable via the Arduino IDE and posses an USB port.
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Old 20th October 2020, 10:38 AM   #74
phofman is offline phofman  Czech Republic
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It looks like the Teensy boards cost at least 5 times more than the chineese stm32 boards from ebay or aliexpress.
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Old 20th October 2020, 11:22 PM   #75
H713 is offline H713  United States
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I think that as of right now, the need for an STM32 board is borderline. The additional IO is nice, and the additional processing capabilities could be beneficial in the future. The Teensy boards are rather costly and, IMO, won't offer any advantage over the STM32 for this.

I'm still waffling on whether to use an SMT32 or an Arduino Nano for the first iteration. KiCad already has symbols and footprints for the Nano, while it does not have any for the STM32. I'm going to do some digging to see what I can come up with in that regard, since making them myself is a fair bit of time.

Admittedly the ability to use a simple 20 x 2 character display would be pretty neat, but presently would require more IO pins than are available on a Nano.
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Old Yesterday, 05:09 AM   #76
phofman is offline phofman  Czech Republic
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Regardless your AVR/STM32 decision: most Kicad symbols/footprints/3D models are already available in one of the sources

Would this do?

black pill - Search -
EasyEDA


GitHub - yet-another-average-joe/Kicad-STM32: STM 32 library for KiCad
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Old Yesterday, 08:20 AM   #77
H713 is offline H713  United States
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Thanks, I'll take a look at those. Do you know if the standard Arduino libraries work with the STM32?
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