Powering LEDs + arduino from wall?

Thread Starter

RandyMarsh

Joined Oct 30, 2016
3
Hi all
I'm building a LED lighting system which is controlled by an arduino (microprocessor), it will be used in a house for extended time periods (potentially 24/7) so everything will run from a mains power outlet, the LEDs and arduino run at 5V. My plan is to use the 12V 4A power supply connected to a 12V to 5V 8A regulator then to my arduino and LEDs circuit.
Using 120 LEDs x 60mA each = 7.2A at 5v total, 5v 8A power supply are uncommon so I figured a 12V 4A laptop style power brick was the best solution, a 12V to 5V 8A DC regulator will then be used to power the 5V LEDs & arduino.

My question is will this setup work? my main concern is the 12v to 5V non-isolated BUCK regulator being unsafe and giving a stable supply to the circuit.

Thanks in advanced!, I've never had to a power a project like this before and I'm just taking extra precautions to make sure its safe and reliable.

Here are the parts im look at using:
12v 4A power supply: http://www.ebay.com.au/itm/AU-12V-2...hash=item28147f1b4a:m:mn-5uPgxP3EmgEWbLjQkgug
12v to 5V 8A converter: http://www.ebay.com.au/itm/DC-Conve...747814?hash=item33ba871826:g:yJoAAOSwkl5Xdi1P
Addressable RGB LEDs: http://www.ebay.com.au/itm/30-60-14...hash=item3398edcfb2:m:mAqTrdkIxla1t251rO6SYXQ
 

khaldeman

Joined Nov 1, 2016
1
Hi all
I'm building a LED lighting system which is controlled by an arduino (microprocessor), it will be used in a house for extended time periods (potentially 24/7) so everything will run from a mains power outlet, the LEDs and arduino run at 5V. My plan is to use the 12V 4A power supply connected to a 12V to 5V 8A regulator then to my arduino and LEDs circuit.
Using 120 LEDs x 60mA each = 7.2A at 5v total, 5v 8A power supply are uncommon so I figured a 12V 4A laptop style power brick was the best solution, a 12V to 5V 8A DC regulator will then be used to power the 5V LEDs & arduino.

My question is will this setup work? my main concern is the 12v to 5V non-isolated BUCK regulator being unsafe and giving a stable supply to the circuit.

Thanks in advanced!, I've never had to a power a project like this before and I'm just taking extra precautions to make sure its safe and reliable.

Here are the parts im look at using:
12v 4A power supply: http://www.ebay.com.au/itm/AU-12V-2...hash=item28147f1b4a:m:mn-5uPgxP3EmgEWbLjQkgug
12v to 5V 8A converter: http://www.ebay.com.au/itm/DC-Conve...747814?hash=item33ba871826:g:yJoAAOSwkl5Xdi1P
Addressable RGB LEDs: http://www.ebay.com.au/itm/30-60-14...hash=item3398edcfb2:m:mAqTrdkIxla1t251rO6SYXQ

The DC plug input on an arduino needs 7-12V DC, it has it's own power regulator built in. Therefore, your 12V can go directly to the DC input or Vin.
Running an Arduino from 5V can sometimes cause issues in reliability.
Running a large number of LEDs off of the arduino can exceed the max amperage, and therefore I think your idea for a power regulator is a good choice.

I've used a PC Power supply for a lighting project I did once. The bulbs were 12V automotive, so I had the Arduino turn the LED's on via a MOSFET transistor.

I know this is only a partial answer, but it's something.
 
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