• Tasks to complete for Emoji Video Badge

    Neil K. Sheridan12/19/2017 at 19:38 0 comments

    1. Solder the pins connecting 32u4 to the TFT!

    2. Test the TFT. I've already tested the 32u4

    3. Add a microSD card to the TFT (FeatherWing) containing open-source emoji images converted to bmp from png.

    4. Test drawing the bitmaps to the TFT

    5. Test Bluetooth comms using the Adafruit app

    6. Develop and build an Android App using Android Studio. That's ok because I can use this on Windows or Linux. We want a menu to select the emoji from the app, then we communicate with the 32u4 via Bluetooth, and get the TFT to display the associated bitmap emoji which is stored on the microSD. The app will also need to guide through Bluetooth pairing the devices.

    7. Try out some 3d printed cases with the magnetic pin backs.

    8. How about adding a silicon sheet to the front of the housing for some waterproofing?

    9. We'll need an iOS app developed and built too! 

    10. Test battery performance, can we use a 100mAh battery instead (3g), or a 150mAh (4.6g)?

    RESOURCES:

    Here's the Adafruit GFX Graphics Library https://learn.adafruit.com/adafruit-gfx-graphics-library/overview

    Drawing bitmaps (bmp) on the TFT https://learn.adafruit.com/adafruit-2-4-tft-touch-screen-featherwing/drawing-bitmaps

    Open-source emoji (72x72 in PNG) https://github.com/twitter/twemoji/tree/gh-pages/72x72

  • Getting started!

    Neil K. Sheridan11/17/2017 at 20:43 0 comments

    Hi everyone, I got started today on my project to make an emoji video badge! The concept is that you wear a small video badge (6cm screen size)  and it displays emoji depending on your current mood. You can pair your smart-phone to it via Bluetooth, and update the emoji via an app. It could also have switches to update emoji, so it could be used in schools for children to signal to the teacher how they are getting on! 



    Parts: 

    TFT FeatherWing - 2.4" 320x240 Touchscreen For All Feathers $29.99USD 

    weight= 32.2g

    Adafruit Feather 32u4 Bluefruit LE $29.99 USD

    weight= 5.7g

    3d printed pocket similar to this https://learn.adafruit.com/mystical-led-halloween-hood/3d-printed-battery-pocket which holds the battery and badge. Attached to shirt/jacket/etc. with a magnetic pin back (~$1.95USD)

    Lithium Ion Polymer Battery - 3.7v 500mAh $7.95USD

    weight=10.5g

    So, the total weight is approx 50 grams! Is it light enough for a badge to pin on your shirt?



    Well, here's the Feather 32u4 Bluefruit connected to the TFT (it isn't soldered yet).

    The first thing to do is solder the pins connecting the  32u4 Bluefruit connected to the TFT!