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Thread: Teensy 3.2 on Prop Shield

  1. #1
    Junior Member
    Join Date
    Jul 2016

    Teensy 3.2 on Prop Shield


    Halfway thru the page at which is basically "Audio Amplifier" section, I see that teensy is dropped into a socket soldered to prop shield. I got prop shield without pin, so presumbly I can plug teensy and get that to work. Unfortunately, this is not working. I am wondering if you could help to select right connector and I could avoid soldering.


  2. #2
    Senior Member+ defragster's Avatar
    Join Date
    Feb 2015
    Only a few of the Prop shield pins are in use - less when not using the hole thing. Those needed pins should be soldered/socketed though for reliable consistent behavior.
    For Audio I see :: 5V-VIN/GND/3V/AMP/DAC-AudioIN to Teensy and then Speaker +/-

  3. #3
    Junior Member
    Join Date
    Jul 2016
    I am attaching picture and interested in motion sensors. Should I supply +5V, GND aafter soldering 5 Click image for larger version. 

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  4. #4
    Senior Member+ MichaelMeissner's Avatar
    Join Date
    Nov 2012
    Ayer Massachussetts


    Unfortunately, I can't tell from your pictures what is connected and what isn't.

    The socket in the diagram is the 14x1 socket sold at the Teensy store (, but you could use normal male headers (, or the double insulator pins created for the octows2812 shield (

    I have this google spreadsheet that lists the various pins used:

    For the motion sensors, you need to connect the i2c pins (A4/A5), in addition to the standard 3.3v, 5v, ground pins. IMHO, you probably should just connect all for the pins, but according to my notes, the following pins should be connected:
    • Ground pin
    • Pin 2 (for i2c interrupts)
    • Pin 5 (to enable the amplifier)
    • Pin 6 (to enable the 8 megabytes flash memory)
    • Pin 7 (for the LEDs)
    • Pin 11 (for SPI MOSI, and LED lights)
    • Pin 12 for (SPI MISO)
    • Pin 13 (for SPI SCLK and LED lights)
    • Pin 18/A4 (for i2c bus)
    • Pin 19/A5 (for i2c bus)
    • 3.3v
    • AGND (for audio output)
    • 5v VIN
    • Pin A14/DAT (for audio output)

  5. #5
    Junior Member
    Join Date
    Jul 2016
    Thanks MichaelMeissner, this definitely helped as made it clear exact reason for these pins on side. I used female socket on Prop Shield so that I can take Teensy out and plug into Generic Shield, it worked like charm! At the moment I am not using Audio as I wanted a good alternative of MX2125 from Parallel. Both in fact worked, however I see great potential in Teensy 3.2 as a nice combo of SPI and i2c. Probably a design blue print from Paul might give better insight.

    Thanks a bunch

  6. #6
    Senior Member PaulStoffregen's Avatar
    Join Date
    Nov 2012
    Quote Originally Posted by vvishwa View Post
    Probably a design blue print from Paul might give better insight.
    What specifically are you thinking? There's already a pinout diagram and schematic on the prop shield page (scroll down to Technical Details).

    Would something else help? I probably can't do much until we're shipping the K66 boards... but I would like to improve the page in the future to clear up any confusion. Please let me know what improvements would have helped, and I'll put it on my to-do list.

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