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Power / Batteries

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Power Supply / Voltage Regulator
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Hand Crank Generator
$14.95  
Out-of-stock
This hand-held crank generator produces up to 15 volts of DC electricity. The integrated PCB includes a full bridge rectifier to provide the same output polarity for either direction the hand crank is turning. In addition, other devices can be easily connected to the screw terminal.
Out-of-stock
-31%
In-line power switch for 2.1mm barrel jack
$2.50 $3.60  
10 pc(s)
Add a power switch to any project simply by plugging this between the power supply. This is the most useful thing you never knew you needed! You'll want to pick up a bunch for your electronic projects. Comes with a 5.5/2.1mm barrel jack on one end an a plug on the other. In between is an...
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LiPo Charger Basic - Micro-USB
$15.95  
Out-of-stock
If you need to charge LiPo batteries, this simple charger will do just that, and do it fast! The LiPo Charger Basic is stripped down of all features and just does one thing well - charge 3.7V LiPo cells at a rate of 500mA per hour. It is designed to charge single-cell Li-Ion or Li-Polymer...
Out-of-stock
-9%
LiPo Charger Plus - USB Type-C
$15.00 $16.50  
1 pc(s)
The SparkFun LiPo Charger Plus is the souped-up power option in the SparkFun line of single-cell lithium polymer (LiPo) battery chargers. With this iteration, we've changed the input charge connector to USB-C and provided charge rate selection as well as optional thermal protection. Charge,...
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-15%
MOSFET Power Controller
$12.50 $14.75  
2 pc(s)
MOSFETs are awesome. They're like a switch that you flip electronically! This SparkFun MOSFET Power Controller makes it easy to switch a battery supply on and off using your favorite microcontroller. The board also has sewable pads so you can use it in e-textile projects that need more juice....
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Negatron DC-DC Converter
$36.50  
4 pc(s)
Negatron is a buck-boost converter that takes a positive voltage and turns it into a negative voltage that you can use with amplifier circuits and more. The output is adjustable from -1.3V to -12V. Negatron is also able to step up/step down the magnitude of the voltage. For example,...
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Non-Isolated Single Relay Module For 3V Controller
$6.50  
1 pc(s)
This single channel Relay Module is specially designed for low-voltage devices and works well with 3.3V power supply. It can be used to control the lighting, electrical and other equipments through the digital IO port. The module comes with on-board back EMF protection to eliminate the...
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Opto-Isolated Relay Module - 16 Channels (5V)
$22.99  
1 pc(s)
This 16 channels Relay Module can be used to control the lighting, electrical and other equipments through the digital IO port. The digital input circuit is optically isolated from the relay, so your controller is protected from voltage spikes and surges. The module is controlled with 5V...
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Opto-Isolated Relay Module - 2 Channels (5V)
$3.99  
3 pc(s)
This two channels Relay Module can be used to control the lighting, electrical and other equipments through the digital IO port. The digital input circuit is optically isolated from the relay, so your controller is protected from voltage spikes and surges. The module is controlled with 5V...
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Pololu 5V, 15A Step-Down Voltage Regulator D24V150F5
$83.95  
1 pc(s)
This synchronous switching step-down (or buck) regulator takes an input voltage of up to 40 V and efficiently reduces it to 5 V with an available output current of around 15 A. Typical efficiencies of 80% to 95% along with its high current capabilities make this regulator well suited for...
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Pololu 9V, 15A Step-Down Voltage Regulator D24V150F9
$85.95  
3 pc(s)
This synchronous switching step-down (or buck) regulator takes an input voltage of up to 40 V and efficiently reduces it to 9V with an available output current of around 15 A. Typical efficiencies of 80% to 95% along with its high current capabilities make this regulator well suited for...
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Polymer Lithium Ion Battery - 1000mAh 3.7V With JST PH Connector
$16.70  
9 pc(s)
**This battery is not available to ship outside Singapore** This is a very small, extremely lightweight battery based on Lithium Ion chemistry, with the highest energy density currently in production. Each cell outputs a nominal 3.7V at 400mAh! Comes terminated with a standard 2-pin...
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-30%
Relay SPDT Sealed - 3V
$0.95 $1.35  
61 pc(s)
These are general purpose, Single Pole - Double Throw (SPDT) sealed relays. Use them to switch high voltage, and/or high current devices. This relay's coil has switch voltage of 3V at 120mA. The contacts are rated 10A at 120VAC, 10A at 30VDC. Features : 3V DC SPDT...
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Round Shape 2 x CR2032 Coin Cell Battery Holder - 6V output with On/Off switch
$0.65  
7 pc(s)
This tiny coin cell battery holder is ideal for small portable or wearable projects. It holds two 20mm CR2032 coin cells in series to generate 6V nominal. CR2032 tends to have about 220mAh capacity so this holder would give you 6V @ 220mAh with two cells.
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Single Channel Relay Module (5V)
$1.99  
Out-of-stock
This Single Relay Module can be used to control the lighting, electrical and other equipments through the digital IO port. Applications include solenoid valves, lamps, motors and other high current or high voltage devices. The modules are controlled with 5V signal and they are pre-soldered. A...
Out-of-stock
-50%
Solar Panel - 18V 2.5W
$18.75 $37.50  
2 pc(s)
Need a clean energy source to power you project? Check out this high quality, high output solar panel. Each panel features high efficient polycrystalline cells mounted onto a fibreglass PCB and covered with epoxy resin which protect the cells without reducing efficiency. A weatherproof plastic...
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-8%
SparkFun Sunny Buddy - MPPT Solar Charger
$37.50 $40.55  
1 pc(s)
This is the Sunny Buddy, a maximum power point tracking (MPPT) solar charger for single-cell LiPo batteries. This MPPT solar charger provide you with the ability to get the most possible power out of your solar panel or other photovoltaic device and into a rechargable LiPo battery. Set-up is...
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Sunflower Solar Power Manager 5V
$14.50  
3 pc(s)
Solar Power Manager 5V is a small power and high-efficiency solar power management module designed for 5V solar panel. It features as MPPT (Maximum Power Point Tracking) function, maximizing the efficiency of the solar panel. Apart from serving as a solar charger, the module can provide up to...
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SWADJHV High Voltage Step Down Adjustable Switching Regulator
$42.50  
4 pc(s)
The SWADJHV is the a high-voltage edition of our popular DE-SWADJ adjustable switching reulators. It is designed to accept an input voltage ranging from 5-60V, allowing you to power a variety of applications from extremely high-voltage sources. The SWADJHV is pin-compatible with the common 78XX...
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