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Ways to Power a Project
Here are some of the most common methods used for powering a project:
- USB Power
- Variable DC Benchtop Power Supply
- AC to DC Wall Adapter (like a computer or laptop would use)
- Batteries
Four common ways to supply power to your project
Which Option Should I Pick to Power My Project?
The answer to this question largely depends on your project specific requirements.
USB Power
If you're starting off with the SparkFun Inventor's Kit or another basic development board, you will likely just need a USB cable. The Arduino Uno is an example that requires only a USB A to B cable to supply the power to run the example circuits in the kit. Here are a few USB cables from our catalog to power your project from a USB port.
Out of stock
CAB-00512
This is a standard issue USB 2.0 cable. This is the most common A to B Male/Male type peripheral cable, the kind that's usual…
1
In stock
CAB-10215
USB 2.0 type A to Micro-B 5-pin. This is a new, smaller connector for USB devices. Micro-B connectors are about half the heig…
15
In stock
CAB-14743
USB C is fantastic. But until we have converted all our hubs, chargers, and ports over to USB C this is the cable you're goin…
4
In stock
CAB-11301
This is a USB 2.0 type A to Mini-B 5-pin cable. You know, the mini-B connector that usually comes with USB Hubs, Cameras, MP3…
3
Variable DC Benchtop Power Supply
If you're in the business of building projects and testing circuits regularly, acquiring a variable DC bench power supply is highly recommended. This will allow you to set the voltage to a specific value depending on what you need for your project. It also buys you some protection as you can set a maximum current allowed. Then, if there is a short circuit in your project, the bench supply will shut down hopefully preventing harm to some components in your project.
Here are a few variable DC benchtop power supplies from our catalog.
Power Supply - Multi-Range DC 84V, 10A
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TOL-14926
This Multi-Range DC Power Supply from B&K Precision is capable of replacing several power supplies on your work bench by offe…
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TOL-14927
This Multi-Range DC Power Supply from B&K Precision is capable of replacing several power supplies on your work bench by offe…
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Retired
TOL-14928
This Switching DC Power Supply from B&K Precision is a compact 108 Watt power supply delivering 1-36V and 0-3A from its main …
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Switching Power Supply - DC 20V, 5A
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TOL-14929
This Switching DC Power Supply from B&K Precision is a compact 100 Watt power supply delivering 1-20V and 0-5A from its three…
3
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AC to DC Wall Adapters
A specific AC to DC power supply is often used after a circuit is proven. This option is also great if you often use the same development board again and again in your projects. These wall adapters usually have a set voltage and current output, so it's important to make sure that the adapter you choose has the correct specifications as the project you will be powering and to not exceed those specifications. Here are a few wall adapters from the catalog that offer a few amps.
In stock
TOL-15313
This is a high quality AC to DC 'wall wart' which produces a regulated output of 12VDC at up to 600mA.
In stock
TOL-15314
This is a high quality switching 'wall wart' AC to DC 9V 650mA wall power supply manufactured specifically for SparkFun Elect…
1
In stock
TOL-11456
USB is being implemented as a power connection standard more and more these days, but you don't always have a computer on han…
2
In stock
TOL-15311
This is a high quality switching 'wall wart' AC to DC 5V 2000mA USB Micro-B wall power supply manufactured specifically for S…
For more current hungry projects, check out some of these power supplies from our catalog. Just make sure to get the appropriate cable for your region from product page's recommended products.
Retired
TOL-14601
This is a 40W single output switching power supply from Mean Well that has been specifically designed to be with LED applicat…
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Mean Well Switching Power Supply - 24VDC, 18.8A
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TOL-16265
This Mean Well Switching Power Supply has an output of 24VDC, 18.8A, 451.2W.
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Mean Well Switching Power Supply - 12VDC, 12.5A
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TOL-16266
This Mean Well Switching Power Supply has an output of 12VDC, 12.5A, 150W.
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Mean Well Switching Power Supply - 5VDC, 18A
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TOL-16607
This is a 100W single output switching power supply from Mean Well.
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Batteries
If you want your project to be mobile or based in a remote location away from where you can gather AC wall power from the grid, batteries are the answer you're looking for. Batteries come in a huge variety, so be sure to check out the later parts of this tutorial so you can figure out precisely what to choose. Common choices include alkaline, rechargeable NiMH AA's, and lithium polymer ion. Here are a few batteries from the catalog.
In stock
PRT-13855
These are very slim, extremely light weight batteries based on Lithium Ion chemistry. Each cell outputs a nominal 3.7V at 200…
9
In stock
PRT-10218
These are your standard 9 Volt alkaline batteries from Rayovac. Don't even think about trying to recharge these. Use them wit…
1
In stock
PRT-00335
2500mAh 1.2V Nickel Metal Hydride rechargeable 'AA' batteries. [NiMH technology](http://en.wikipedia.org/wiki/Nickel_metal_hy…
Retired
TOL-15204
We've taken the classic, portable, rechargeable lithium ion battery pack and tweaked the design to make it amenable to low cu…
3
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If your project needs a certain voltage or a bit more current from a battery, try adding a boost converter or switching regulator. You can take the varying voltage from your battery and output a set voltage 5V. Depending on the board and components used with your project, you could potentially output 9V or 10V depending on the configuration. You'll just need make sure to get the necessary components to build your circuit in order to output voltages higher than 5V. Here are a few converters from our catalog.
In stock
COM-15208
The SparkFun Buck-Boost Converter is a handy power accessory board that allows you to fine tune the amount of power your proj…
2
In stock
PRT-14411
The SparkFun 5V/1A LiPo Charger/Booster is a no-nonsense circuit for generating one amp from a Lithium Polymer battery at 5V.…
3
Only 14 left!
PRT-10255
The LiPower board is based on the incredibly versatile TPS61200 boost converter. The board is configured to be used with a Li…
5
Retired
COM-00317
DC to DC converter/regulator MC34063A. Has an input range of 3V to 40V, output switch current of up to 1.5 amp. Step up, step…
Retired