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1-Channel Solid State Relay Module
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,...

120W DC-DC Converter 12V@10A
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Price: $49.99
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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: $10.21
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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: $67.23
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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 Solid State Relay Module
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...

3.7V 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-Channel Relay Module-10A
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...

45W DC-DC Converter 9V@5A
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Price: $32.75
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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: $2.24
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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

5A 75W DC-DC Module
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
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 ...

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: $46.54
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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-Channel Relay Module-10A
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.        ...

9V Battery DC Jack
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: $2.93
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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...

Adjustable DC-DC Booster- LM2577
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 Integrated DC-DC Module- LM2596S
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...

Battery Holder - 8 x AA
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 ...

BreadBoard Power Supply
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...

DC Barrel Jack Adapter - Female
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Price: $3.28
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DFRobot Item #: FIT0151 -

This adapter allows you to connect a barrel jack connector to bare wires. One end has screw terminals and the other has a 5.5x2.1mm(0.22x0.08"), center-positive female barrel jack. If you have a power supply with a barrel jack and want to plug it into a breadboard, this might be the simple solution. |ShippingList| DC Barrel Jack Adapter Female x1

DC Barrel Jack Adapter - Male
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Price: $3.23
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DFRobot Item #: FIT0110 -

This adapter allows you to connect a barrel jack connector to bare wires. One end has screw terminals and the other has a 5.5x2.1mm, center-positive male barrel jack. If you need to connect bare wires to a barrel jack on an Arduino or a development board, this might be the simple solution. With this Power Jack, you can feed various power source to your Arduino project, from 9V battery to 6xAA battery. A sample use is illustrated below. The 9V battery clip is also available at This picture is...

DC-DC boost converter
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Price: $12.93
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DFRobot Item #: DFR0123 -

This is multipurpose boost converter, a breakout board. Supply voltage is as low as 3.7v and it boosts to as high as 34v. With this module, you can now power your Arduino with our 3.7V lipo battery or use it to regulate any other project.The tiny form factor and its simplicty makes it for a very nice addition for all projects requiring an extra power module.Note: This board does not have reverse polarity protection, so please be sure to recognize the polarity of your connections! The input...

DC-DC Boost Module (0.9-5V)
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Price: $6.72
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DFRobot Item #: FIT0471 -

This is a small DC - DC boost module that converts a 0.9 ~ 5v power source to standard 5V, making it capable of supplying power to an Arduino microcontroller and other small electronic devices that use a 5v input. It integrates a PFM DC-DC boost control chip. The maximum output current is up to 500 ~ 600 mA. There are two power input ports, PH2.0 and KF235-3.81-2P which are compatible with DFRobot's 3.7 V lithium battery.Note: Please pay attenetion to the battery polarity when connecting the...

DC-DC Power Module 25W
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Price: $14.65
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DFRobot Item #: DFR0205 -

This Power Module is a small size 5A 350KHz 25V Buck DC to DC Converter. It can convert any DC voltage between 3.6V-25V to a selectable voltage from 3.3V to 25V.You can choose 5V direct output voltage with the convenient on-board switch or adjust the output voltage by the blue & white resistor. Three different output interfaces for convenient and fast prototyping of projects with multiple voltage requirements.The Ovout (Original Voltage output) interface can output the power supply voltage of...

HVFF Copper Union Straight Pneumatic Hand Valves
Retail: $2.90
Price: $2.23
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Elecrow Item #: EL-DIY14520V -

If you need a general-purpose pipe joints valve switch, it can help you, you need to choose a tube of 4mm diameter, may be a fluorine plastic or PU tube, but you should notice that silicone tube can not be used with it. It can work at harsh environment with long worklife.Featureshand valve are deisgned to turn on and off the airflowSuitable for 4mm tubeLong worklifeSpecificationsMedia: Air or VacuumOperating Pressure?0 ~ 1.0 MPaNegative Pressure?-750mmHgPressure Proof?1.5 MPaOperating...

Lipo Charger
Price: $18.94
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Elecrow Item #: EL-PSB01012B -

    The LiPo Charger is extremely affordable and easy to use. No programming is required. Plug it in and it works. The internal charger IC handles all the power flow between the various components.     The LiPo Charger board will Show red LED to alarm when the battery is low power, or it will show Green. It allows you ride the solar wave to run your favorite 5V device. The LiPo Charger board is the ideal green power solution for your outdoor sensor...

Liquid Pump - 350GPH (12v)
Price: $20.42
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Sparkfun Item #: ROB-10455 -

"Do you have some liquids that you need to move? This fluid pump will move 350 gallons per hour! The SEAFLO mini water pump has a heavy duty 12V, 1.5Amp motor and a tough thermoplastic body. It’s totally submersible and water-cooled (but it won’t burn out if run dry). Use this pump to make a fountain or waterfall, even water your plants! The ¾" connection will accept a 19mm ID hose. It comes pre-terminated with heavy gauge unterminated 3ft long wire leads. Features: 12V...

Solenoid - 36v
Price: $23.83
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Sparkfun Item #: ROB-10391 -

"Solenoids are a great way to induce linear motion for pushing, pulling or controlling switches and levers. According to the datasheet this solenoid is rated for 36V but they work like a charm at 12V. We’ve been controlling them with the Arduino Power Driver Shield, there’s even some example code below. With a throw of 10mm these solenoids are great for all kinds of motion applications such as actuating door latches, automating percussion instruments or just poking people. At 12...

Solenoid - 5v (small)
Price: $5.96
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Sparkfun Item #: ROB-11015 -

"Solenoids are a great way to induce linear motion for pushing, pulling or controlling switches and levers. This smaller solenoid is designed to work directly with 5V which makes it a great match for embedded projects. It has a throw of about 4.5mm and 2 M2 mounting holes on the body. The wire lead is about 2" long and is terminated with a 2-pin JST PH connector. Note: The mounting holes on this solenoid are actually 1.6mm in diameter. This will allow you to tap for an M2 screw. Also, although...

Turnigy 2000mAh 1S 1C Lipo w/ 2 Pin JST-PH Connector
Price: $14.43
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HobbyKing Item #: MK-9067000191-0 -

Turnigy batteries are known the world over for performance, reliability and a household name in the RC community. It’s no surprise to us that Turnigy Lipo packs are the choice for those in the know. Turnigy batteries deliver their promises of full capacity, performance and at a price everyone can agree with. You will not find a better deal in Lipo batteries anywhere!Features:• Performance and reliability• Trusted name in the RC community• Great value for the price• Made from quality components...

Turnigy nano-tech 950mah 1S 25~50C Lipo Pack (Walkera V120, X100)
Price: $10.87
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HobbyKing Item #: MK-9210000004 -

Finally, a nano-tech has arrived for your Walkera V120 and X100 helicopters. Boost the performance of your machine with this 1S 950mAh 25-50C high power Lipo.The Turnigy nano-tech round single series cells are the perfect solution for many applications where space and weight are at a premium. These round Lipoly cells can be soldered together to make custom packs to suit your needs.More than just a fancy name. TURNIGY nano-tech Lipoly batteries were designed from the ground up with serious...

Vacuum Pump - 12V
Price: $18.72
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Sparkfun Item #: ROB-10398 -

"This vacuum pump really sucks! This pump operates at 12V and has enough suction for most small projects. We even used one to make our very own universal gripper using coffee grounds, balloon and some other parts. Features: 12V motor 12W operation ¼" barbs 0-16" Hg vacuum range Documents: Dimensional Drawing Spec Sheet " ...

Znter 9V 400mAh USB Rechargeable LiPoly Battery
Price: $19.92
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HobbyKing Item #: MK-897000001-0 -

Introducing the revolutionary new rechargeable battery! the Znter range of batteries are Li-polymer batteries with a difference! The batteries can be charged via a USB cable anywhere, anytime no special charger is required. Simply plug the micro USB cable into the battery and find your nearest available USB port to charge! With over 15 billion Alkaline batteries made and thrown away each year wasting resources, C02 and creating toxic Landfill sites the Znter rechargeable batteries offers an...