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Type: Posts; User: marsthrax

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  1. Help with plan for force sensitive matrix project.

    I am trying to make a force sensitive resistor matrix to cover a 7"x16" area. The basic idea came from two videos that show a larger form factor (yoga mat):

    Part 1:...
  2. Config error when trying to use prop shield

    I recently started having an issue with initializing the motion sensors in a prop shield. During initialization of the FXOS8700, I added some debugging. In a nutshell, it looks like it is trying to...
  3. I looked at the Teensy 3.2 schematic, and took a...

    I looked at the Teensy 3.2 schematic, and took a stab at a schematic for the circuit to isolate AGND and filter out the noise. I honestly have no idea if this is correct, or if it could be simplified...
  4. I've managed to get sound working with the ESP32...

    I've managed to get sound working with the ESP32 through the prop shield. There were a few false starts, but I'm able to use the ESP32's built-in I2S interface to play MP3s through the DAC, which is...
  5. manitou, Paul, Yea, that's what I was a little...

    manitou, Paul,

    Yea, that's what I was a little afraid of, but after digging a little more last night it's pretty much what I expected. I hadn't looked too closely at SPIFFS yet, I'll be sure to do...
  6. Alright, so good news: I finally found a...

    Alright, so good news: I finally found a configuration that lets me use the NXPMotionSensors and the APA102 output, which is awesome.
    Bad news: I'm not sure how to progress using the amp and the...
  7. Ah, you're right. I was apparently looking at...

    Ah, you're right. I was apparently looking at /usr/avr/include/util/crc16.h. I was able to copy over the one from teensy (along with ellapsedMillis.h), and it the calibration example worked as...
  8. I'm not having much luck interfacing with...

    I'm not having much luck interfacing with anything on the prop shield (tried APA102 and motion sensors so far), although I think I have things hooked up correctly. Right now I'm trying to just work...
  9. Thanks for the link. I did see that. I was more...

    Thanks for the link. I did see that. I was more referring to whether or not there was some issue with jumping the above pins that I wasn't aware of (I'm not as much of a hardware person, mostly just...
  10. Great, thanks for the info. I was afraid I'd need...

    Great, thanks for the info. I was afraid I'd need to connect AGND to something. I thought I read a thread on here that said connecting a battery's negative terminal to AGND could cause problems. From...
  11. Connecting Prop Shield to ESP32 Feather via Feather Wing

    I recently picked up an ESP32 feather (https://learn.adafruit.com/adafruit-huzzah32-esp32-feather/pinouts), and want to try hooking it up to a Prop Shield via a feather wing adapter...
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    GX-16/9 Wiring

    This is a follow-on to a separate thread regarding a Bluetooth lightsaber. Essentially, I'm going to put either Neopixel strips or Dotstar strips in a blade, and want to connect them to a hilt with a...
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    On a semi-related note, is there a fritzing file...

    On a semi-related note, is there a fritzing file for the prop shield? I've been looking, but can't find one. I was hoping to diagram it out to make sure the connections all made sense.
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    Makes sense. For my case, the strip is all I care...

    Makes sense. For my case, the strip is all I care about, and I assume the fact that AP102s (as far as I have read) require 5V shouldn't matter because the prop shield has a 5V pin intended for that....
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    All good information, thanks both of you for the...

    All good information, thanks both of you for the details. Are there any significant advantages to the Neopixels over the Dotstars? I looked at the Dotstar comparison...
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    Yep, I know. I am planning to use BLE (my phone...

    Yep, I know. I am planning to use BLE (my phone supports it, and I've been using it in my current build). The goal is allow for configuration over BLE (changing sound fonts, blade color), as well as...
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    Gotcha, makes sense. I might just try it and see...

    Gotcha, makes sense. I might just try it and see what happens. I don't think the interrupt pin will be a huge deal for me (right now I'm just checking it in my loop), but Pin 7 might. Is it enabled...
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    Thanks for the reply. I'm a little confused by...

    Thanks for the reply. I'm a little confused by the response, but maybe I wasn't clear. My understanding is that the props shield doesn't have an on board processor (normally you would use a Teensy as...
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    Bluetooth Lightsaber Guidance

    I've been working for a few months off and on to make a bluetooth enabled lightsaber. I've had some success, but I'm looking to make some changes that I hope will make it a little better. Right now,...
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