Gemma

This is a special forum devoted to educators using Adafruit and Arduino products for teaching.

Moderators: adafruit_support_bill, adafruit

Please be positive and constructive with your questions and comments.
User avatar
Franklin97355
 
Posts: 23911
Joined: Mon Apr 21, 2008 2:33 pm

Re: Gemma

Post by Franklin97355 »


User avatar
adafruit_support_rick
 
Posts: 35092
Joined: Tue Mar 15, 2011 11:42 am

Re: Gemma

Post by adafruit_support_rick »

ashleyhaw wrote:What is the serial console at 9600?
In the Serial Monitor window, there is a dropdown button on the lower right. Set this to 9600
ashleyhaw wrote: Hi! I tried to repair the bootloader as advised, and this is the error message I receive:

code.cpp:1:24: error: optiLoader.h: No such file or directory
code.cpp:10: error: expected initializer before '*' token
code.cpp:11: error: 'uint8_t' does not name a type
code.cpp:19: error: 'uint16_t' does not name a type
code.cpp:46: error: expected constructor, destructor, or type conversion before '*' token
optiloader.h is one of the files that is part of the trinketloader sketch. You need to have it in the same folder as the trinketloader.ino file:
trinketloader.png
trinketloader.png (180.76 KiB) Viewed 399 times

User avatar
Janefox
 
Posts: 16
Joined: Wed Jul 29, 2015 1:18 am

Re: Gemma

Post by Janefox »

Hi
The boys at my school in our Makerspace community are making a wearable electronic cuff and I would like to power it with the Gemma and some Smart Neopixels.
Can you recommend a list of materials that we would need for about 10 students?
Also would you recommend the Gemma or Gemma v2?
Jane

User avatar
adafruit_support_rick
 
Posts: 35092
Joined: Tue Mar 15, 2011 11:42 am

Re: Gemma

Post by adafruit_support_rick »

We don't stock the Gemma v1 anymore, so you'll get the v2.

You might consider getting one of the Gemma Starter Packs to get yourself going
https://www.adafruit.com/products/1657


If you want to wrap the NeoPixels around the cuff, you could get NeoPixel strips and cut them to length. They come in increments of 1 meter.
https://www.adafruit.com/products/1461
https://www.adafruit.com/products/1460
https://www.adafruit.com/products/1506

Or, you could get individual Flora NeoPixels, and sew them to the cuffs with conductive thread
https://www.adafruit.com/products/1260
https://www.adafruit.com/products/1559

If you cut the strips, you will have to solder wires to the individual segments for connection to the Gemma.

You'll also need a battery of some kind. I suggest a small LiPo battery
This is the smallest we have
https://www.adafruit.com/products/1317
This one is a little bigger, but will give you a longer run-time
https://www.adafruit.com/products/1578

You'll need a charger for the batteries:
This is the simplest one we have:
https://www.adafruit.com/products/1304

Locked
Please be positive and constructive with your questions and comments.

Return to “For Educators”