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- Power Supply - 12V/5V (2A)
Does your project need a little more umph than our wall wart adapters can supply? Why not give this a shot? This 2A "laptop brick" supply outputs both 5V and 12VDC and is terminated with a 4-pin ATX connector.
The ATX connector is a standard 8981 Series Power Connector, like the disk drive connectors in your PC. Adapters and cable assemblies are easy to come by at computer supply stores (also, check our related items) so you shouldn't have any trouble getting your project powered up.
Note: Only the pin next to 5V is grounded. The pin next to 12V is not connected (NC). Please refer to the picture of the bottom of the unit for more information. The AC cable for is included and works with 100-240VAC inputs via a 2-prong style plug.
- Input Voltage: 100 to 240VAC @ 50-60Hz
- Output Voltage: 12V / 5V
- Output Current: 2A
- Output Power: 34 Watts
- Input Connector: IEC C14
- Output Connector: Molex 8981
Power Supply - 12V/5V (2A) Product Help and Resources
Connector Basics
January 18, 2013
Connectors are a major source of confusion for people just beginning electronics. The number of different options, terms, and names of connectors can make selecting one, or finding the one you need, daunting. This article will help you get a jump on the world of connectors.
How to Power a Project
February 7, 2013
A tutorial to help figure out the power requirements of your project.
RGB Panel Hookup Guide
December 12, 2013
Make bright, colorful displays using the 32x16, 32x32, and 32x64 RGB LED matrix panels. This hookup guide shows how to hook up these panels and control them with an Arduino.
Touch Potentiometer Hookup Guide
October 22, 2015
Learn how to use the SparkFun Touch Potentiometer to control lighting, volume or other inputs in your daily life.
Large Digit Driver Hookup Guide
June 25, 2015
Getting started guide for the Large Digit display driver board. This tutorial explains how to solder the module (backpack) onto the back of the large 7-segment LED display and run example code from an Arduino.
12V/5V Power Supply Hookup Guide
May 10, 2018
In this tutorial, we will replace the 12V/5V (2A) power supply's molex connector with two male barrel jacks adapters.
ATX Power Connector (4-Pin) Breakout Hookup Guide
October 10, 2019
Do you need to power a project with 12V and 5V from one wall adapter? The ATX power connector breaks out the standard 4-pin computer peripheral port for your 12V and 5V devices!
Core Skill: Electrical Prototyping
If it requires power, you need to know how much, what all the pins do, and how to hook it up. You may need to reference datasheets, schematics, and know the ins and outs of electronics.
Skill Level: Rookie - You may be required to know a bit more about the component, such as orientation, or how to hook it up, in addition to power requirements. You will need to understand polarized components.
See all skill levels
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Customer Reviews
3.5 out of 5
Based on 4 ratings:
2 of 2 found this helpful:
Great buy!
Recently purchased one of these to power a project I was working on. Needed both 5 volt and 12 volt so this fit the bill exactly. The unit is very well made and the outputs are both very, very close to the stated values. Also appears that there is very little ripple on the outputs. Had a little trouble finding a receptacle that fits the output plug but finally found out it is the standard for the power connectors on the old floppy drives.
0 of 1 found this helpful:
12V/5V DC Cable too short
I suppose I should have studied the picture a little better, however I have never seen an AC adapter come with such a short cable on the output side. The cable is permanently attached and the only way to resolve this would be to buy an extension cable with mating male/female molex connectors on each end.
0 of 3 found this helpful:
Kind of useless with the missing ground
I had hoped to use this to power a 12V DAC and a separate raspberry Pi. Unfortunately, I only get to choose one because there's only one ground. That means it outputs 5V OR 12V (not 5V and 12V) unless you're willing to daisy chain the ground connection.
Hi there! Both voltages share the same ground pin so both voltages are available.
So convenient for dual voltage projects!
I have several projects using stepper motors and RPi and this power supply simplifies the power chain when matched with the breakout board and right angle connector. ATX Right Angle Connector - PTH 4-pin ATX Power Connector Breakout Board
The description of this power supply being "2A" is a bit ambiguous, since it has two different voltage outputs. However, the datasheet clarifies that it can supply 2A at 12V (24W) and also 2A at 5V (10W), for a total of 34W.