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4-Channel Relay Module-10A
Price: $9.29
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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 we want to use a relay and do we really need to?...

8-Channel Relay Module-10A
Price: $16.29
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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. Why do we want to use a relay and do we really need to?...

Vacuum Pump - 12V
Price: $24.92
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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 " ...

Solenoid - 5v (small)
Price: $8.25
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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...

2-Channel Solid State Relay Module
Price: $15.87
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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 in various areas such as computer peripheral...

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...

Audio Amplifier PAM8403 with Volume Control
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Price: $3.45
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Elecrow Item #: EL-ASAA8403P -

The PAM8403 is a 3W, class-D audio amplifier. It offers low THD+N, allowing it to achieve high quality sound reproduction. The new filter less architecture allows the device to drive the speaker directly, requiring no low-pass output filters, thus to save the system cost and PCB area. With the same numbers of external components, the efficiency of the PAM8403 is much better than that of class-AB cousins. It can extend the battery life, ideal for portable applications.Features3W Output at 10%...

1-Channel Relay Module-10A
Price: $4.43
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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. Why do we want to use a relay and do we really need to?...

Relay Shield v1.1
Price: $18.20
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Elecrow Item #: EL-MCS01584R -

The Relay Shield v1.1 is an Arduino compatible smart module with 4 mechanical relays providing an easy way to control high voltage. The max switching power is 35VDC 70W for each channel. It can be directly controlled by Arduino/Crowduino through digital IOs with external 9V DC supply. Compared to the Relay shield1.0, the v1.1 version use 4 selector instead of those push buttons used on version1.0, to make it more convenient to control the relays manually. Note: Please note that the pins on...

5V Brushless Portable Submersible Pump
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...

2-Channel Relay Module-10A
Price: $4.62
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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. Why do we want to use a relay and do we really need to?...

Liquid Pump - 350GPH (12v)
Price: $24.92
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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...

1/2" Solenoid Valve DC12v
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Price: $12.83
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Elecrow Item #: EL-ATS04220D -

This solenoid valve helps users control the flow of water(gas;oil). It would make a great addition to the robotic gardening projects. Normally, the valve is closed. When 12VDC is applied to the two terminals, the valve opens and water can push through. Notice that the liquid can only flow one direction. The product performance stability, durable, safe, reliable and high sensitivity.FeaturesThe use of the environment is not more than 2500 meters above sea levelThe working medium temperature 0...

Solar Panel- 1W 5.5V
Price: $6.53
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Elecrow Item #: EL-PS0155GE -

Need a clean energy source for your project? Check out this compact, high quality, high output endurable solar panel. This solar panel mates directly with many of our development boards and has a high efficiency. Unit has a clear epoxy coating with hard-board backing, provides an efficient and waterproof surface for the panel application on out-door projects. There is an adhesive tape on the top of the panel, Please pulled off it before using! Specification Dimensions: 95x95x2.8Typical...

1-Channel Solid State Relay Module
Price: $11.20
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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, temperature/speed light adjustment, servo control,...

3.6V Micro Hydro Generator(G1/4"
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...

Adjustable Integrated DC-DC Module- LM2596S
Price: $13.95
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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 measure, between...

1/4" PE Pipe Solenoid Valve DC12v
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Price: $14.00
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Elecrow Item #: EL-ATS02012P -

This solenoid valve helps users control the flow of water. Normally, the valve is closed. When 12VDC is applied to the two terminals, the valve opens and water can push through. Notice that the liquid can only flow one direction. It use with PE pipe.Features Rated voltage: DC 12VRated current: 200mA-400mAPE pipe inner diameter: 4mm PE pipe outer diameter: 6.4mmPackage list1/4" PE Pipe Solenoid Valve DC12V x 1Wiki & External links ...

12mm SMD Passive Buzzer
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Price: $2.31
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Elecrow Item #: EL-AS0012PBU -

A good quality passive buzzer that was used in one of Elecrow projects, with Oscillation frequency 4K Hz.

4-Channel Solid State Relay Module
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Price: $25.20
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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 in various areas such as computer peripheral...

8 Channels Infrared Remote Control Relay Module for Arduino
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Price: $25.67
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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 installationSpecification Size: 133 x 55 x 19mm Working Voltage: DC 5-5.5V Relay contact capacity: AC 250V 10A, DC 30V 10APackage list 8 Channels...

8-Channel Solid State Relay Module
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Price: $43.87
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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...

HVFF Copper Union Straight Pneumatic Hand Valves
Price: $4.93
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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...

Large Current Relay Module- 30A
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Price: $11.62
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Elecrow Item #: EL-ARE01101SL -

The Relay is the most common used module in actually application such as home automation, and sometimes you need to control large current such as the air conditioning/water heater. That is what this Large Current Relay Module can be help. This Large Current Relay Module is a high quality Single Pole Souble Throw Relay(SPST). When the relay not triggered, the 2 outputs is disconnected; when the relay triggered(Logic Low), the 2 outputs connected, the max current can be up to 30A@240VAC or...

Mini Thermal Tablets 20x 6mm
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Price: $8.87
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Elecrow Item #: EL-ATT502006MT -

Mini Thermal Tablets 5x 4mm
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Price: $4.20
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Elecrow Item #: EL-ATT500504MT -

Music  Player Module -WT5001
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Price: $22.87
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Elecrow Item #: EL-AMP5001WT -

Thermal Tablets with USB Cable
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Price: $6.53
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Elecrow Item #: EL-ATT50545UC -