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Larson Eye help
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Larson Eye help

by mattielung on Fri Jun 14, 2019 11:22 am

I am attempting to create the Larson Eye.

I purchased the NeoPixel RGB 144 and the Gemma MO.

I also purchased the recommended circuit playground bolt on kit in hopes that I could avoid having the solder anything.

The pictures in the tutorial show 3 wires coming from the end of the Neopixel RGB being attached to the GEMMA MO.

The neopixal RGB has 4 wires coming from it. (See attachment)
2 of the wires, black and white have a plastic thingy (sorry I am new to the world of electronics) that I assume would be used to attache 2 neopixel strips together.

I think that I need to cut off the plastic attachment and use only the white wire and disregard the other black wire.

Can some one please let me know if this is the correct procedure?

I am really excited about getting this working!!!

Here is the link to the adafruit guide

https://learn.adafruit.com/larson-scanner-shades
Attachments
20190614_110021.gif
20190614_110021.gif (895.76 KiB) Viewed 31 times
Last edited by mattielung on Fri Jun 14, 2019 2:22 pm, edited 1 time in total.

mattielung
 
Posts: 2
Joined: Fri Jun 14, 2019 11:06 am

Re: Larson Eye help

by kcl1s on Fri Jun 14, 2019 2:06 pm

OK. Let see if we can get your project going.

You mention the Larson Eye, are you working from a tutorial? If so post a link.

Normally for a 144 pixel strip you would need an external 5 volt power supply. If you only ever run the Larson code you will only have a few pixels lit at a time and can get away with the USB or battery power. See the Neopixel guide more info https://learn.adafruit.com/adafruit-neopixel-uberguide

For wiring best to cut the connector off for your project (your attachment did not come through) the 2 blacks are GND. Just twist them together and connect to GND on the Gemma. The Red wire should go to Vout on the Gemma. The signal wire (white?, blue?) can go to any I/O pin on the Gemma. Adjust your code for that connection.

That should get you started. Ask questions or post photos using the File Upload below the edit window if you need more help.

Fellow hobbyist
Keith

kcl1s
 
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Re: Larson Eye help

by mattielung on Fri Jun 14, 2019 2:20 pm

This is the tutorial I am working from.

https://learn.adafruit.com/larson-scanner-shades

I think you have answered my question.

Thanks for your help!!!!


Just in case, I am going to re-add the picture of what I bought to the original post. It was too big and I had to resize it.
Attachments
20190614_110021.gif
20190614_110021.gif (895.76 KiB) Viewed 32 times

mattielung
 
Posts: 2
Joined: Fri Jun 14, 2019 11:06 am

Please be positive and constructive with your questions and comments.