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Thread: Teensy 3.2 on Prop Shield

  1. #1
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    Teensy 3.2 on Prop Shield

    Hi,

    Halfway thru the page at http://www.pjrc.com/store/prop_shield.html 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.

    Regards
    V

  2. #2
    Senior Member+ defragster's Avatar
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    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
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    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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ID:	7768pins?

  4. #4
    Senior Member+ MichaelMeissner's Avatar
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    Cool

    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 (http://www.pjrc.com/store/socket_14x1.html), but you could use normal male headers (http://www.pjrc.com/store/header_14x1.html), or the double insulator pins created for the octows2812 shield (http://www.pjrc.com/store/header_14x1_d.html).

    I have this google spreadsheet that lists the various pins used: https://docs.google.com/spreadsheets...#gid=515300396.

    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
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    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
    Vijay

  6. #6
    Senior Member PaulStoffregen's Avatar
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    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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