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[101-Help]~12v -> 5v 1.5A Regulated PowerCircuit For NeoPixels.
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Please be positive and constructive with your questions and comments.

[101-Help]~12v -> 5v 1.5A Regulated PowerCircuit For NeoPixels.

by EternalCore on Tue Aug 20, 2013 5:06 am

Here's a Schematic I made and FULLY tested for how to use a regulator properly, which I'm willing to share, for Powering your NeoPixels or any other 5V devices up to 1.5A.

Note: This thread is to help others make a power supply for the NeoPixels or any other 5v devices. So If you have a question then feel free to ask.

I Built and tested this on a Lead-Acid 12v 7AH battery and it works flawlessly for a strand of 30 Neopixels on FULL illumination.
Also Running the strandtest on 60 Neopixels runs flawlessly. :D

Here's my 3Amp Parallel Regulator version: [101-Help]~12v -> 5v 3A Parallel Regulated PowerCircuit For NeoPixels.

Schematic, The Parts I used and breadboard design pic are below.


Final Version on a PCB:

Image


Note1: Your ~12v power supply must have At-least:
Battery: ~12v DC @ 2Ah(2000mhA) Of storage to use this design.
Wall: Output ~12v DC @ 2A current to use this design.

Note2: You MUST use a Heat-sink to dissipate the heat otherwise you might fry your IC.

Schematic:
Image

Part tested with:
Regulator LM7805C
Ceramic Cap1 0.22uf
Ceramic Cap2 0.1uf
Electrolytic Cap3 25v 1000uf
2x 3Amp Diodes

Breadboard tested design with the part listed above:


Image



Let me know what you think.
-Enjoy
Last edited by EternalCore on Mon Sep 02, 2013 12:25 pm, edited 7 times in total.
Things I've Made Here:
1.[101-Help]~12v -> 5v 1.5A Regulated Power For NeoPixels.: http://goo.gl/uMXuk7
2.[Example]NeoPixel Strip Scrolling Cylon Eye!: http://goo.gl/4RzWQQ
EternalCore
 
Posts: 239
Joined: Tue Jul 30, 2013 3:57 pm
Location: Canada

Re: [101-Help]~12v -> 5v 1.5A Regulated PowerCircuit For NeoPixels.

by lastone on Wed Aug 21, 2013 10:11 am

Why not use the Mini DC/DC Step-Down (Buck) Converter - 5V @ 1A output - TSR12450?

Yes it's only 1 A, but my understanding is that you could run 2 in parallel and thus have 2 A output without making a board. Seems more simple. Also no heat sink is required.
lastone
 
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Joined: Thu Dec 20, 2012 1:31 am

Re: [101-Help]~12v -> 5v 1.5A Regulated PowerCircuit For NeoPixels.

by EternalCore on Wed Aug 21, 2013 10:30 am

lastone wrote:Why not use the Mini DC/DC Step-Down (Buck) Converter - 5V @ 1A output - TSR12450?

Yes it's only 1 A, but my understanding is that you could run 2 in parallel and thus have 2 A output without making a board. Seems more simple. Also no heat sink is required.

Because Using a regulator is safer and I will be doing a parallel regulator design too which will bring it up to +3Amps. ;)

P.S. The board for my design is actually quite small as the 2 biggest things on it is the 1000uf cap and the regulator with heat-sink.
Things I've Made Here:
1.[101-Help]~12v -> 5v 1.5A Regulated Power For NeoPixels.: http://goo.gl/uMXuk7
2.[Example]NeoPixel Strip Scrolling Cylon Eye!: http://goo.gl/4RzWQQ
EternalCore
 
Posts: 239
Joined: Tue Jul 30, 2013 3:57 pm
Location: Canada

Re: [101-Help]~12v -> 5v 1.5A Regulated PowerCircuit For NeoPixels.

by EternalCore on Wed Aug 21, 2013 1:38 pm

UPDATE: Added Breadboard design picture.
Things I've Made Here:
1.[101-Help]~12v -> 5v 1.5A Regulated Power For NeoPixels.: http://goo.gl/uMXuk7
2.[Example]NeoPixel Strip Scrolling Cylon Eye!: http://goo.gl/4RzWQQ
EternalCore
 
Posts: 239
Joined: Tue Jul 30, 2013 3:57 pm
Location: Canada

Re: [101-Help]~12v -> 5v 1.5A Regulated PowerCircuit For NeoPixels.

by EternalCore on Fri Aug 30, 2013 6:59 pm

Update: Added a Final version printed on a PCB to show how small it actually is!


Final Version on a PCB:

Image
Things I've Made Here:
1.[101-Help]~12v -> 5v 1.5A Regulated Power For NeoPixels.: http://goo.gl/uMXuk7
2.[Example]NeoPixel Strip Scrolling Cylon Eye!: http://goo.gl/4RzWQQ
EternalCore
 
Posts: 239
Joined: Tue Jul 30, 2013 3:57 pm
Location: Canada

Re: [101-Help]~12v -> 5v 1.5A Regulated PowerCircuit For Neo

by EternalCore on Sat Oct 05, 2013 12:55 am

We need a place to post our stuff... Bill, rick or Adafruit can you guys make this possible and move this thread to it???
Things I've Made Here:
1.[101-Help]~12v -> 5v 1.5A Regulated Power For NeoPixels.: http://goo.gl/uMXuk7
2.[Example]NeoPixel Strip Scrolling Cylon Eye!: http://goo.gl/4RzWQQ
EternalCore
 
Posts: 239
Joined: Tue Jul 30, 2013 3:57 pm
Location: Canada

Re: [101-Help]~12v -> 5v 1.5A Regulated PowerCircuit For Neo

by GG066 on Mon Jan 20, 2014 9:18 pm

I am building an off-grid Arduino-based weather station that needs to run off solar and a lead-acid battery. I looked at a commercial vendors solar/battery setup, and its easy to replicate, and do so inexpensively. I don't understand the regulator they are using (I am still learning circuit design), and I am wondering if your design would be suitable for my purpose. The battery is a 6v 12AH Panasonic, and their regulator is a 7805 with a diode protecting the +5v feed to the battery, and 4 connected diodes on the Com pin of the 7805. The commercial design has no capacitors. The feed to the Arduino would come from the battery. I noticed that you are using 12v input. What changes would be needed for a 6v solar panel as the source?
GG066
 
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Joined: Wed Mar 06, 2013 4:18 pm

Re: [101-Help]~12v -> 5v 1.5A Regulated PowerCircuit For Neo

by hoprocker on Mon Jul 28, 2014 9:43 pm

EternalCore, awesome topic, thanks so much for this circuit. Have you done any experiments with switching regulators? It looks like Adafruit sometimes carries a regulator using the MP2307 https://www.adafruit.com/datasheets/MP2307_r1.9.pdf buck converter, which looks like it *may* be more power-efficient. I'd love to hear your thoughts.

hoprocker
 
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Joined: Mon Jul 28, 2014 9:23 pm

Please be positive and constructive with your questions and comments.