Yes, it's another super-noob with a beginner question that just baffles me to no end:
I have an arduino, connected to a power source 5V, 0.5A.
Then there's a neopixel ring that has its own separate power source so I can draw more Amps.
If I want to build a battery-less project with this, will I need TWO power adapters ?!?! Will I be the first person in the world that needs TWO adapters plugged in to run his project ???
Thanks,
Technician going bonkers.
Neopixel power source
Moderators: adafruit_support_bill, adafruit
Please be positive and constructive with your questions and comments.
- adafruit_support_bill
- Posts: 88089
- Joined: Sat Feb 07, 2009 10:11 am
Re: Neopixel power source
You can power both with one adapter - assuming it has sufficient capacity.
- Kokodoko
- Posts: 32
- Joined: Sun Jul 27, 2014 8:50 am
Re: Neopixel power source
I'm confused because the Adafruit tutorial suggests that the pixels use a different power source than the Arduino board.
Also the Arduino documentation says that you need 9-12V to power the arduino, which is different from the exact 5V you need for Neopixels?
http://playground.arduino.cc/Learning/WhatAdapter
I've attached a Fritzing sketch (power supply is 5V 2A).
Would this work? Thanks a lot!
Also the Arduino documentation says that you need 9-12V to power the arduino, which is different from the exact 5V you need for Neopixels?
http://playground.arduino.cc/Learning/WhatAdapter
I've attached a Fritzing sketch (power supply is 5V 2A).
Would this work? Thanks a lot!
- Attachments
-
- pixel_powersupply.png (59.99 KiB) Viewed 387 times
- Kokodoko
- Posts: 32
- Joined: Sun Jul 27, 2014 8:50 am
Re: Neopixel power source
Googling resulted in this image, I suppose this is the correct way to power an Arduino board with a 5V line.
Perhaps this can be added to the Neopixel Uberguide (if this is correct :-)
Perhaps this can be added to the Neopixel Uberguide (if this is correct :-)
- adafruit_support_bill
- Posts: 88089
- Joined: Sat Feb 07, 2009 10:11 am
Re: Neopixel power source
You need 7-12v if you are powering via the DC input jack. The processor itself runs on 5v. Since you stated in your original post "I have an arduino, connected to a power source 5V, 0.5A." I was assuming that you are doing that either via the USB port or directly via the 5v pin.Also the Arduino documentation says that you need 9-12V to power the arduino, which is different from the exact 5V you need for Neopixels?
That will work. However you should not connect the Arduino to your computer via USB when powered that way. A safer approach is to power the Arduino via the USB port. You can make a USB power cable by cutting the A-plug from an A-B cable and splicing the wires to your power suply. https://www.adafruit.com/products/900Googling resulted in this image, I suppose this is the correct way to power an Arduino board with a 5V line.
- Kokodoko
- Posts: 32
- Joined: Sun Jul 27, 2014 8:50 am
Re: Neopixel power source
Thanks! So this should be it? (Now the USB is also used for grounding the Neopixels, instead of wiring to a GND pin).
- Attachments
-
- ground_usb.png (126.51 KiB) Viewed 374 times
- adafruit_support_bill
- Posts: 88089
- Joined: Sat Feb 07, 2009 10:11 am
Re: Neopixel power source
Also run a separate "signal ground" wire directly from the Arduino GND pin to the neopixels.Now the USB is also used for grounding the Neopixels, instead of wiring to a GND pin
- Kokodoko
- Posts: 32
- Joined: Sun Jul 27, 2014 8:50 am
Re: Neopixel power source
Thanks, just to wrap up this post I included a final sketch.
Please be positive and constructive with your questions and comments.