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Party Neopixel App Glasses Trinklet M0 version Need Help
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Party Neopixel App Glasses Trinklet M0 version Need Help

by Blueshark on Tue Jan 22, 2019 10:20 pm

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Last edited by Blueshark on Sat May 04, 2019 3:26 am, edited 2 times in total.

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Re: Party Neopixel App Glasses Trinklet M0 version Need Help

by Blueshark on Tue Jan 22, 2019 10:42 pm

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Last edited by Blueshark on Sat May 04, 2019 3:27 am, edited 1 time in total.

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Re: Party Neopixel App Glasses Trinklet M0 version Need Help

by Blueshark on Fri Jan 25, 2019 11:33 pm

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Last edited by Blueshark on Sat May 04, 2019 3:27 am, edited 1 time in total.

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Re: Party Neopixel App Glasses Trinklet M0 version Need Help

by adafruit_support_mike on Sun Jan 27, 2019 6:35 am

In theory there could be a problem, but in practice it almost always works.

Most 5V CMOS devices use a signal protocol that requires them to accept signals 3.5V or higher as HIGH input. These days, with chips being designed for mixed-voltage systems, the limit is usually defined as 70% of VCC, whatever voltage VCC happens to be.

To guarantee a chip obeys that protocol, manufacturers usually design chips that accept anything over 60% to 65% of VCC as HIGH input. That puts the real high-input threshold down around 3V, where it will accept input from 3.3V devices.

It's an off-spec use of the device, so you can't blame the manufacturer if it doesn't work, but you're free to take advantage of it if experience shows that it does work.

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Re: Party Neopixel App Glasses Trinklet M0 version Need Help

by ddgjim on Fri Apr 26, 2019 3:29 pm

Blueshark wrote:I have a Trinket M0 / Neopixel powering Question, regarding this project.


I'm using these Neopixel Rings, 2 of them...
https://www.adafruit.com/product/1586

Q. If I power the Neopixel Rings with the Trinket M0 USB pin, isn't there going to be a problem since the Neopixels are being powered by the 5V of the USB port, but the Data pin is a 3V singnal from the Trinket M0 pin...


Cheers..
Don't know if I'm in the right place, but I'm building some display jars and want to mount the 1586 ring in the cap to light up the jar. I only need white light and am wondering what ring to buy. 1586 size is right. Also need to know how to power the light, and if there's a battery powered option. If anyone can direct me to the corect place to ask this question, that would be great. I'm looking for both light, and driver/power supply specifications so I can purchase. Thanks in advance for yoour help. Regards, Jim

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Re: Party Neopixel App Glasses Trinklet M0 version Need Help

by Blueshark on Fri Apr 26, 2019 10:36 pm

ddgjim

using these neopixel rings with the Trinket M0 is do able....
https://www.adafruit.com/product/1586

the thing is that when you want to power the rings is that the rings require 5V, the Trinket M0 has a special pin called "USB Out" that connects straight to the USB cable giving you the 5V that is required.

To power the Trinket M0 I use this Phone Charger....
https://www.adafruit.com/product/1565

This phone charger has a low internal shut off current switch, it stays ON under a small load; but I have not tested it under a Trinket M0 and 1 NeoPixel ring under White light.... maybe it will stay on or maybe it will not.

Using a 3.7V Lipo battery is not recommended because the Neopixel ring needs 5V to work, it may work under one of these Lipo Batteries but not recommended....
https://www.adafruit.com/product/3898

you just need to solder one of these connectors to the Trinket M0 underneath it...
https://www.adafruit.com/product/1769

To get a better response from the Admin start a New Thread under the Trinket M0 Forum regarding this question, include pictures of the jars, and lids you want to use...

Hope this info helps you...

Cheers...

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