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1-Channel Relay Module-10A
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Price: $4.40
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Elecrow Item #: EL-ARE00101SL -

    A Relay is a digital switch to control much higher voltages and currents than your normal Arduino boards does. When inputs a logic voltage, the relay will switch to allow current to flow or cutoff, depending on your wiring. A Relay usually consists of a coil, 1 common terminal, 1 normally closed terminal and one normally open terminal. When the coil is energized, the common terminal and the normally open terminal will have continuity.        ...

1-Channel Solid State Relay Module
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Price: $11.12
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Elecrow Item #: EL-ARE00201SL -

   Compares with the traditional mechanical relay, the Solid State Relay (SSR) has many advantages: it has a longer life, with a much higher turn on/off speed and no noise. Besides, it also has better resistance to vibration and mechanical shock, and better moisture proof performance.        This Solid State Relay Module is based on Omron G3MB, to control current upto 2A@240VAC, can be widely used in various areas such as computer peripheral interfaces,...

10-32V to 12-35V 150W DC/DC Booster
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Price: $12.84
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Elecrow Item #: EL-PCH12350D -

    With this DC-DC boost module, you can charge your laptop in your car or any other 10~30 V power supply. The output voltage is adjustable from 12~36V with a max of output current 6A, this module would be powerful and stable to power up your whole system. Specification Module Properties: non-isolated step-up module (BOOST) Input voltage :10-32V Output voltage: 12-35V (adjustable, 2V higher than input voltage at least) Output Current: 6A (MAX) Input Current: 10A (MAX) (Please...

12.6V 1A Lithium Battery Charger
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Price: $18.08
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Elecrow Item #: EL-PCA1260BC -

     Charger for the lithium battery, output voltage 12.6V and output current 1A(decrease in constant voltage charging mode).Also, a LED indicator to show user the working status. Short circuit protection/over-current protection and over-voltage protection help users using the charger safely. It can be used to charged for the 10.8V/11.1V/12V/12.6V lithium Batteries. Specifition Output Voltage:12.6V; Output Current: 1.0A; Weight:85 g; Input Voltage: 110~240V 50/80 Hz; Output...

120W DC-DC Converter 12V@10A
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Price: $74.91
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DFRobot Item #: FIT0170 -

This is a waterproof DC-DC converter. With 12-40V DC input, it converts to 12V@10A which is an ideal supply for embedded PC and robots.|Features| Overvoltage protection Overcurrent protection Overheat protection Short-circuit protection Waterproof and shockproof case High efficiency and less heat|Specification| Input Rage: 15-40V DC Output: 12V DC Output Current: 10A Size: 74 X 74 X 32mm (2.91x2.91x1.26") Efficiency: 90% Weight: 0.28Kg Maximum working temperature: 80 ? |ShippingList| 120W...

12V Solenoid Valve - 3/4"
Price: $13.25
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Sparkfun Item #: ROB-10456 -

"Have you ever wanted to control the flow of a liquid using your computer or microcontroller, but didn’t know how? Well, here’s how: The 12V solenoid controlled fluid valve. Simply connect a fluid source to the ¾" threaded inlet and it will interrupt the flow until 12V is applied to the fast-on connectors on the solenoid. Note: This is not a gravity-feed solenoid. This means that you will need enough water pressure to fully open the valve. Check the datasheet below for exact...

150W DC-DC Converter 24V@6A
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Price: $93.13
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DFRobot Item #: FIT0171 -

This is a waterproof DC-DC converter. With 8-40V DC input, it converts to 24V@6A which is an ideal supply for mobile robots, and motors. |Features| Overvoltage protection Overcurrent protection Overheat protection Short-circuit protection Waterproof and shockproof case High efficiency and less heat|Specification| Input Rage: 8-40V DC Output: 24V DC Output Current: 6A Size: 74 X 74 X 32mm(2.91x2.91x1.26") Efficiency: 90% Weight:0.28Kg Maximum working temperature:80 ? |ShippingList| 150W DC-DC...

2-Channel Relay Module-10A
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Price: $4.57
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Elecrow Item #: EL-ARE00102SL -

    A Relay is a digital switch to control much higher voltages and currents than your normal Arduino boards does. When inputs a logic voltage, the relay will switch to allow current to flow or cutoff, depending on your wiring. A Relay usually consists of a coil, 1 common terminal, 1 normally closed terminal and one normally open terminal. When the coil is energized, the common terminal and the normally open terminal will have continuity.        ...

2-Channel Solid State Relay Module
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Price: $16.88
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Elecrow Item #: EL-ARE00202SL -

   Compares with the traditional mechanical relay, the Solid State Relay (SSR) has many advantages: it has a longer life, with a much higher turn on/off speed and no noise. Besides, it also has better resistance to vibration and mechanical shock, and better moisture proof performance.        This Solid State Relay Module has two channels, which work and be controlled separately. it is based on Omron G3MB, to control current upto 2A@240VAC, can be widely used...

3 x AA Battery Holder with On/Off Switch, JST, and Belt Clip
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Price: $5.62
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Adafruit Item #: ADA-3287 -

This battery holder connects 3 AA batteries together in series for powering all kinds of projects. We spec'd these out because the box is compact, and 3 AA's add up to about 3.3-4.5V, a very similar range to Lithium Ion/polymer (Li-Ion) batteries, plus it has a nifty on-off switch. That makes them ideal for use with 3.3V projects that have a 2-pin JST connector meant for one of our Li-Ion/Poly batteries. (Of course, you can't recharge them like Li-Ion/Polys, so don't try to plug this into one...

3 x AAA Battery Holder with On/Off Switch, JST, and Belt Clip
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Price: $5.62
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Adafruit Item #: ADA-3286 -

This battery holder connects 3 AAA batteries together in series for powering all kinds of projects. We spec'd these out because the box is slim, and 3 AAA's add up to about 3.3-4.5V, a very similar range to Lithium Ion/polymer (Li-Ion) batteries, plus it has a nifty on-off switch. That makes them ideal for use with 3.3V projects that have a 2-pin JST connector meant for one of our Li-Ion/Poly batteries. (Of course, you can't recharge them like Li-Ion/Polys, so don't try to plug this into one...

3.6V Micro Hydro Generator(G1/4"
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Price: $33.67
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Elecrow Item #: EL-ACS15835G -

This generator provides you clean and renewable electricity. It is time to replace the Li-po batteries in your waterside projects with the green and more accessible hydro power. This generator could satisfy your two main demands, specifically it provides great electric current when on and off and supplies stable electric current to avoid not enough electricity. Besides it shares durable product lifelong which could be up to over 10,000 hours with high reliability. Most importantly it is...

3.7V 400mAh 25C Lipo Battery
Price: $15.23
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HobbyKing Item #: MK-451000064-0 -

A tiny 3.7V 400mAh 25C Lipo Battery - handy for those little projects.Spec.Capacity: 400mAhConfiguration: 1S / 3.7v / 1CellCell Weight: 10.8g

4 x AA Battery Holder with On/Off Switch
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Price: $5.62
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Adafruit Item #: ADA-830 -

Make a nice portable power pack with this 4 x AA battery holder. It fits any alkaline or rechargeable AA batteries in series. There's a snap on cover and an on/off switch which can be handy when wiring to something without a switch. The four batteries are held in series, for a nominal output of 6V DC for alkaline (6.4V when fresh, 4V when dead), and 4.8V DC for rechargeables (5.2V when fully charged, 4.4V when discharged). Using rechargeables will make this work nicely with nearly any 5V...

4-Channel Relay Module-10A
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Price: $9.93
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Elecrow Item #: EL-ARE00104SL -

    A Relay is a digital switch to control much higher voltages and currents than your normal Arduino boards does. When inputs a logic voltage, the relay will switch to allow current to flow or cutoff, depending on your wiring. A Relay usually consists of a coil, 1 common terminal, 1 normally closed terminal and one normally open terminal. When the coil is energized, the common terminal and the normally open terminal will have continuity.          Why do...

4-Channel Solid State Relay Module
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Price: $27.51
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Elecrow Item #: EL-ARE00404SL -

   Compares with the traditional mechanical relay, the Solid State Relay (SSR) has many advantages: it has a longer life, with a much higher turn on/off speed and no noise. Besides, it also has better resistance to vibration and mechanical shock, and better moisture proof performance.        This Solid State Relay Module has four channels, which work and be controlled separately. it is based on Omron G3MB, to control current upto 2A@240VAC, can be widely used...

45W DC-DC Converter 9V@5A
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Price: $50.62
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DFRobot Item #: FIT0169 -

This is a waterproof DC-DC converter. With 16-36V DC input, it converts to 9V@5A which is a good supply for robots. |Features| Overvoltage protection Overcurrent protection Overheat protection Short-circuit protection Waterproof and shockproof case High efficiency and less heat|Specification| Input Rage: 16-36V DC Output: 9V DC Output Current: 5A Size: 58 X 40.5 X 22mm(2.28x1.59x0.87") Efficiency: 96% Weight:0.09Kg Maximum working temperature:80 ? |ShippingList| 45W DC-DC Converter(FIT0169) x1 ...

4xAA battery holder (square with cover)
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Price: $3.54
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DFRobot Item #: FIT0080 -

Simple 4 Cell AA Battery holder with 5" tinned leads, square configuration. This holder features a sliding, removable cover as well as an ON/OFF switch which can be used to control power to your project.|Specification| Battery Quantity: 4 Battery type: AA With Cover With On/Off switch|ShippingList| 4 Cell AA Battery holder x1

5 x AA Battery Holder with 2.1mm DC Jack
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Price: $7.52
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Adafruit Item #: ADA-3456 -

Here's yet another addition to our family of AA battery holders. It's a holder for five (5) AA batteries, with 5" wire leads. It's black and has a 2.1mm barrel plug (tip positive). 5 x AA battery packs are best used with Arduino-compatibles and other dev boards with 2.1mm DC jacks and a 5V regulator, because 5V regulators tend to like 1-2V of overhead. 4 x AA battery holders would give you ~6VDC, which is just a tiny bit too low. This 5 x AA holder is just big enough to fit on our robot rover...

5A 75W DC-DC Module
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Price: $11.19
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Elecrow Item #: EL-PC0575DC -

    This module integrated a volage meter with the DC-DC converter � XL4015, with this module, you can monitor your project much more easier. The voltage meter can measure the input voltage or output voltage, which is adjustable by the protentiometer, with a precision of �0.1V.Note that the voltage meter would not work if the input voltage below 4V. Press the button (right) to switch voltage to measure, between the input voltage and output voltage. There are 2 LEDs to...

5V 15M Invertor for EL Wire
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Price: $13.44
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Elecrow Item #: EL-PC0515IN -

     Invertor for EL wires or tapes, special designed for the Elecrow 8-channel EL Shield, can drive EL wire up to 15M . Specification Input voltage : 5V DC Output voltage : 110V~210V AC Maximum driving ability: 15m EL wire Dimensions: 40mm x 32mm x 28mm Wire Length: 30cm (input) and 15cm (output) Interface: JST2.0 ...

5V Brushless Portable Submersible Pump
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Price: $24.39
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Elecrow Item #: EL-DIY19560P -

This is a brushless submersible pumps with USB connector, can work at 3.5V to 9V voltage, low noise and low power consumption. Super long working life(more than 30000 hours). Adopt high performance ceramic shaft. The axis is enclosed with static sealing, not dynamic, which can avoid leaking problems. You can adjust the water flow as you like by the slide block.If you want to DIY a solar fountain you can click here to choose a solar panel.SpecificationsWorking Voltage:DC 3.5-9VHeight...

5V DC-DC Booster- CE8301
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Was: $2.09
Sale: $1.21
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Elecrow Item #: EL-PCH8301C -

    This 5V output DC-DC booster uses the mini PFM DC/DC IC CE8301 to get a stable 5V output voltage with 0.9~5V input voltage. There is also a Type-A USB connector on the board, so this module can power other USB device directly with a USB cable, especilly suitable for protable device and and Arduino projects that needs to collect power outdoors.           Features On-board Type-A USB connector Wide Input Voltage Range On-board LED Indicator...

6 x AA battery holder with 5.5mm/2.1mm plug
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Price: $4.76
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Adafruit Item #: ADA-248 -

Make a portable power brick with plenty of juice! Use Alkaline AA's for a 9V 3000-4000mAh power supply, or rechargeable NiMH for 2000mAh 7.5V supply. Either one is good for running electronics that have a 5V voltage regulator (thus requiring a 7V+ supply). Will last about 10 times longer than a 9V Perfect for portable Arduinos! Batteries not included

7.4V USB Charger
Price: $5.96
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HobbyKing Item #: MK-774000001-0 -

A nifty USB charger for 7.4V 2S LiPoly batteries. Charges via a USB port to the balance lead on the battery.Specs:Input Voltage: 5VDC (USB Port)Output Voltage: 4.2VDC x 2Charge Plug: JST-XHWeight: 20g

72W DC-DC Converter 12V@6A
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Price: $72.89
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DFRobot Item #: FIT0145 -

This is a waterproof DC-DC converter. With 8-40V DC input, it converts to 12V@6A which is ideal supply for embedded PC and robot power.|Specification| Input Range: 8 - 40 V/DC Output Voltage: 12 V/DC Output Current: 6A Size: 71*73*28(mm)/2.80inches * 2.87inches * 1.1inches) Waterproof ,Light compact Switching mode power supply Non-isolated Efficiency: 82~88%; Ambient temperature at -10 ? ~ 45 ?.|ShippingList| 72W DC-DC Converter x1 ...

8 Channels Infrared Remote Control Relay Module for Arduino
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Price: $23.67
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Elecrow Item #: EL-ARA08051A -

This item is a infrared relay module with remote control. With 8 channel and LED status indicator, ideal for single chip microcomputer, household appliance control, etc. Features Double trigger design IC design for two-way drive Good capacity of resisting disturbance Afford large current and safe Adjustable input control With indicator light Easy installation Specification Size: 133 x 55 x 19mm Working Voltage: DC 5-5.5V Relay contact capacity: AC 250V 10A, DC 30V 10A Package list 8 Channels...

8 x AA battery holder
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Price: $5.62
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Adafruit Item #: ADA-449 -

When you need a portable 12V power pack, this big holder will do the job! The holder will store 8 AA batteries end to end, to give approximately 12VDC output with up to 2 amp peak current draw. We like this configuration in particular because it holds the batteries securely, even if being bumped/moved around. This would make a good power source for EL panels, 12V stepper motors (for a robot), or analog LED strip such as this 30 RGB LED, 60 LED RGB or warm white). You may want to pick up a DC...

8 x AA battery holder with 5.5mm/2.1mm Plug and On/Off Switch
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Price: $11.33
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Adafruit Item #: ADA-875 -

Make a portable power brick with plenty of juice! Use Alkaline AA's for a 12V 3000-4000mAh power supply, or rechargeable NiMH for 2000mAh 9.6V supply. Either one is good for running electronics that have a 5V voltage regulator (thus requiring a 7V+ supply) or perhaps some motors or solenoids.Perfect for portable Arduinos, motors, solenoids, 12V LED strips, etc. An On/Off switch lets you control the power right at the source without unplugging. Batteries not included, may or may not include...

8-Channel Relay Module-10A
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Price: $17.31
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Elecrow Item #: EL-ARE00108SL -

    A Relay is a digital switch to control much higher voltages and currents than your normal Arduino boards does. When inputs a logic voltage, the relay will switch to allow current to flow or cutoff, depending on your wiring. A Relay usually consists of a coil, 1 common terminal, 1 normally closed terminal and one normally open terminal. When the coil is energized, the common terminal and the normally open terminal will have continuity.        ...

8-Channel Solid State Relay Module
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Price: $49.79
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Elecrow Item #: EL-ARE00808SL -

Compares with the traditional mechanical relay, the Solid State Relay (SSR) has many advantages: it has a longer life, with a much higher turn on/off speed and no noise. Besides, it also has better resistance to vibration and mechanical shock, and better moisture proof performance.  This Solid State Relay Module has eight channels, which work and be controlled separately. it is based on Omron G3MB, to control current upto 2A@240VAC, can be widely used in various areas such as computer...

9V Battery DC Jack
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Price: $0.73
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Elecrow Item #: EL-PSB00901B -

    This adapter consists of a 9V battery clip and a standard 5.5*2.1mm center positive barrel jack, it applied to power any device such as Arduino Uno, that needs 9V input voltage and has on-board barrel jack.      ...

9V to Barrel Jack Adapter V2
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Price: $3.00
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DFRobot Item #: FIT0043 -

This is the second version of the 9V to Barrel Jack Adapter. In this version the material for the 9V battery jack is hard plastic, which makes it easier to connect and disconnect You can plug a 9V battery into one end and connect the other end to anything with a 5.5x2.1mm, center-positive barrel jack. Use this cable to battery-power any device that needs 9V and has an on-board barrel jack - it works great for Arduinos, development boards, evaluation boards and more! |ShippingList| 9V to Barrel...

Adafruit Micro Lipo w/MicroUSB Jack - USB LiIon/LiPoly charger
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Price: $13.24
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Adafruit Item #: ADA-1904 -

Oh so handy, this little lipo charger is so small and easy to use you can keep it on your desk or mount it easily into any project! Simply plug it via any MicroUSB cable into a USB port and a 3.7V/4.2V lithium polymer or lithium ion rechargeable battery into the JST plug on the other end. There are two LEDs - one red and one green. While charging, the red LED is lit. When the battery is fully charged and ready for use, the green LED turns on. Seriously, it could not get more easy. Charging is...

Adjustable DC-DC Booster- LM2577
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Price: $10.69
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Elecrow Item #: EL-PCH2577S -

LM2577 DC-DC Adjustable Step-up Power Converter Module . The LM2577 series of regulators are monolithic integrated circuits that provide all the active functions for a step-up(buck) switching regulator, capable of driving a 3A load withexcellent line and load regulation. This module uses the adjustable output version, it would facilitate your application and be your good assistant in your debugging.       Features Module Properties: Non-isolated buck Module Rectificatio...

Adjustable DC-DC Step Down Power Supply Module With LCD Display
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Price: $17.88
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Elecrow Item #: EL-PSC20518P -

This is a DC-DC Step Down Power Supply Adjustable Module With LCD Display, the display using STN liquid crystal display screen, voltage and current can be displayed simultaneously, blue background and white character, wide angle and wide field of view. It start used button to adjust voltage, left button to reduced the voltage, the right button to increasing voltage, press button once can adjust 0.04V voltage, if you hold more than 1s, you can quickly adjust voltage. Calibration method: Under...

Adjustable Integrated DC-DC Module- LM2596S
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Price: $15.00
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Elecrow Item #: EL-PCH2596M -

     I love this module so much! It is the upgrade version of the Adjustable Mini DC-DC Module. It integrated a volage meter with the DC-DC module � LM2596S, with this function, you can monitor your project much more easier. The voltage meter can measure the input voltage or output voltage, which is adjustable by the protentiometer, with a precision of �0.1V.Note that the voltage meter would not work if the input voltage below 4V. Press the button to switch voltage to...

B3603 DC-DC Digital Control Step-down Module
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Price: $49.16
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Elecrow Item #: EL-PCB3603DC -

    The B3603 DC-DC Digital Control Step-down Module is a digital control and digital display step-down module, it has small volume, high power, high efficiency and works steady. It controlled by high speed micro controller, and the output voltage and current can be adjusted accurately. There are also 10 groups of storage space, which be used to store and bring up the parameters at any time. This module is equipped with four 8-segment LED digital tube, which can display...

Battery Holder - 1 x AA
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Price: $0.50
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Elecrow Item #: EL-PSC04040H -

This is a single battery holder for a AA battery, it will protect your battery and provide convenience for fix the battery with a screw hole. It has no switch, and you can connect it with two 1007# 26AWG 15cm cable. Put a nice finishing touch on your battery powered project. Specifications Material: PP soft material Spring: nickel-plated steel Rivets: Brass Wire: 1007 # 26AWG Exposed wire length: 150mm Color: Black Package list Battery Holder - (1 x AA) x1 ...

Battery Holder - 10 x AA
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Price: $4.90
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Elecrow Item #: EL-PSB0102B -

This is a simple 10 cell AA battery holder. There is 5 cell in one side. The 5 inch cable is terminated with a standard 5.5x2.1mm, center positive barrel jack connector. The connector mates with the barrel jack on the Arduino (among a number of other products) allowing you to easily make your project battery powered.

Battery Holder - 8 x AA
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Price: $4.40
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Elecrow Item #: EL-PSB00802B -

The 8 x AA Battery Holder with Switch puts a nice finishing touch on your battery powered project. The battery install in the both side of the battery holder and it was two AA battery series connect in together. The 85mm cable is terminated with a standard 5.5x2.1mm, center positive barrel jack connector. Features 8 AA batteries With a DC jack male Rectangle configuration ...

Boost And Buck Voltage Converter LM2577& LM2596
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Price: $21.12
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Elecrow Item #: EL-PCA7796BB -

    With this DC-DC Adjustable boost and buck voltage converter, you can change any other 3.5-28V power supply. The output voltage is adjust from 1.25-26V. For example, your input voltage is 5V, you can adjust the output voltage from 1.25V to 26V any value. The max input and output rated current is 1A. This module integrates LM2596 and LM2577. It is very useful and easy to use. It would be a good assistant in your debugging. Features Input voltage: 3.5V-28V Adjustable...

BooSTick - AA Voltage Booster
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Price: $25.71
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Adafruit Item #: ADA-3265 -

Are you tired of having to accommodate inconvenient power supplies and compromise the mobility and customization of your project? The BooSTick from Rover Development might be just the thing you need! This tiny board allows you to bring the power to your project, and not the other way around. Bring your micro to the sensor without running wires! A single AA battery is used to provide breadboard power of 5V or 3.3V (or other voltages by tuning the feedback resistors), and a boost regulator...

BreadBoard Power Supply
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Price: $8.28
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Elecrow Item #: EL-PSB02011B -

    This power module is design for the standard bread board. Its tiny design doesn't waste your proto zone. This breadboard power supply support Mini USB power supply and power jack 7-12V supply. You can select 5v or 3.3v supply by using jumper cap. Through this board, you can give power to both power lane of the breadboard.      Features 3.3v / 5v power supply optional Mini USB or Exteral power supply optional Wiki & External links...

Camcorder Battery Holder for Panasonic CGR-D28 and CGA-D54s
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Price: $28.47
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Adafruit Item #: ADA-2272 -

This is an interesting kind of battery holder, usually you'll see ones that are designed for holding like AAA's or something. This battery holder is designed to clip into and hold camcorder batteries. Specifically, the Panasonic CGR-D28 (7.4V, 3300mAh) and CGA-D54s (7.2V, 5400mAh) Lithium-Ion Battery Packs. We also have a holder for the SONY NP-Fxx series and Canon LP-E6 series. Comes with just the plastic holder, six screws, and cable assembly. No battery is included! Snap your batteries in...

Camcorder Battery Holder/Adapter for Sony NP-F750 w/ DC Jack
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Price: $18.95
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Adafruit Item #: ADA-2089 -

This is an interesting kind of battery holder, usually you'll see ones that are designed for holding like AAA's or something. This battery holder is designed to clip into and hold camcorder batteries. Specifically, the common SONY NP-Fxx series of batteries and compatibles, made with cylindrical LiIon cells and 7.4v nominal output. By clipping a battery in, you can use this holder to plug into any device with a 2.1mm DC jack that wants about 7VDC. Great for robots, Arduino projects,...

Crowtail- Dry-Reed Relay
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Price: $6.36
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Elecrow Item #: EL-CT008559D -

The Crowtail-Dry-Reed Relay is a relay module which works through magnetizing the vibration reed via the current in the coils. Compared to electromagnetic relays, the contacts completely sealed is the biggest feature of the Dry-Reed Relay. Besides, it features simplicity in construct, compactness, fast speed and long life, which make it widely applied in many fields such as microelectronic detection, Automatic Control etc. Features Crowtail interface Compact Switch faster High sensitivity Good...

Crowtail- Dual Coil Latching Relay Module
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Price: $12.91
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Elecrow Item #: EL-CRT01665R -

This is a dual-channel latching relay?it can keep the original state from changing in the event of a power failure. If you need to change the state, only need to rise or falling edge. Since the power supply can be cut off without changing the operating state,so that the module is specifically designed for low power consumption circuit design. It is widely used in remote control, telemetry, communication, automatic control, electromechanical integration and power electronic equipment, is one of...