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Battery Holder - 4xAA Square
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Price: $3.46
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Sparkfun Item #: PRT-00552 -

Simple 4 Cell AA Battery holder with 5" tinned leads, square configuration.

Battery Holder - 4xAA to Barrel Jack Connector
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Price: $5.32
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Sparkfun Item #: PRT-09835 -

This is a simple 4 cell AA battery holder. 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. Note: the average voltage regulator has about 1V of dropout (but can vary greatly). This pack, with normal alkaline batteries, will output ~5.5V causing a normal 5V board to run at around 4 to 4.5V. This...

Battery Holder 2xAA with Cover and Switch
Price: $2.71
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Sparkfun Item #: PRT-09547 -

This 2xAA battery holder puts a nice finishing touch on your battery powered project. This holder features a removable, sliding cover, which is secured with a small phillips head screw. Another bonus is the ON/OFF switch which can be used to control power to your project. The leads are about 150mm, and the last 5mm of them are tinned. Features: 67.9 x 32.8 x 18.25mm

Battery Holder 2xAA with Cover and Switch - JST Connector
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Price: $2.66
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Sparkfun Item #: PRT-09925 -

This 2xAA battery holder puts a nice finishing touch on your battery powered project. This holder features a removable, sliding cover, which is secured with a small Phillips head screw. Another bonus is the ON/OFF switch which can be used to control power to your project. The leads are about 150mm and are terminated with a JST-XH (2.50mm pitch) connector. Note: This battery holder is NOT compatible with the micro:bit. The micro:bit, Arduino Pro, and other boards utilize a JST-PH connector, not...

Battery Holder 2xAAA with Cover and Switch
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Price: $2.61
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Sparkfun Item #: PRT-09543 -

"This 2xAAA battery holder puts a nice finishing touch on your battery powered project. This holder features a sliding, removable cover as well as an ON/OFF switch which can be used to control power to your project. The leads are about 150mm long, and the last 5mm of them are tinned. Dimensions: 63 x 25 x 15mm"

Battery Holder 3xAA with Cover and Switch
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Price: $3.46
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Sparkfun Item #: PRT-10891 -

This 3xAA battery holder puts a nice finishing touch on your battery powered project. This holder features a removable, sliding cover, which is secured with a small phillips head screw. Another bonus is the ON/OFF switch which can be used to control power to your project. The leads are about 150mm, and the last 5mm of them are tinned. Features: 68.5 x 47.5 x 19.6mm

Battery Holder 4xAA with Cover and Switch
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Price: $3.46
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Sparkfun Item #: PRT-12083 -

This 4xAA battery holder puts a nice finishing touch on your battery powered project. This holder features a removable, sliding cover, which is secured with a small phillips head screw. Another bonus is the ON/OFF switch which can be used to control power to your project. The leads are about 150mm, and the last 5mm of them are tinned.

Battery Holder with Switch - 2 x AA
Price: $1.00
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Elecrow Item #: EL-PSB00202B -

    The 2 x AA Battery Holder with Switch puts a nice finishing touch on your battery powered project. This holder features a removable sliding cover which is secured with a small phillips head screw. Another bonus is the ON/OFF switch which can be used to control power to your project. The leads are about 145mm, and the last 5mm of them are tinned. It is series connection.Specification 2 AA batteries With a cover and fixed screw With a ON/OFF switch ...

Battery Holder with Switch - 3 x AA
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Price: $1.81
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Elecrow Item #: EL-PSB00302B -

    The 3 x AA Battery Holder with Switch puts a nice finishing touch on your battery powered project. This holder features a removable sliding cover which is secured with a small phillips head screw. Another bonus is the ON/OFF switch which can be used to control power to your project. The leads are about 145mm, and the last 5mm of them are tinned. It is series connection.SpecificationBattery Type : AABattery Qty : 3With Cover : YESWith Switch : YESHolder color :...

Battery Holder with Switch - 3 x AAA
Price: $1.67
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Elecrow Item #: EL-PSB00303B -

    The 3 x AAA Battery Holder with Switch puts a nice finishing touch on your battery powered project. This holder features a removable sliding cover which is secured with a small phillips head screw. Another bonus is the ON/OFF switch which can be used to control power to your project. The leads are about 145mm, and the last 5mm of them are tinned. It is series connection.SpecificationBattery Type : AAABattery Qty : 3With Cover : YESWith Switch : YESHolder color :...

Battery Holder With Switch - 4 x AA
Price: $2.00
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Elecrow Item #: EL-PSB00402B -

    The 4 x AA Battery Holder with Switch puts a nice finishing touch on your battery powered project. This holder features a removable sliding cover which is secured with a small phillips head screw. Another bonus is the ON/OFF switch which can be used to control power to your project. The leads are about 145mm, and the last 5mm of them are tinned. It is series connection.Specification 4 AA batteries With a cover and fixed screw With a ON/OFF switch ...

BeagleBone Black - Rev C
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Price: $126.62
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Sparkfun Item #: DEV-12857 -

The BeagleBone Black is a low-cost credit-card-sized development platform with good support from a fast growing community. The BeagleBone Black differs slightly from the regular version by providing you with an onboard micro HDMI port, 512MB of DDR3L DRAM, 4GB onboard flash memory, an AM3358 processor at 1GHz, and making JTAG optional with a user supplied header. Ultimately, the BeagleBone Black is still perfect for physical computing and smaller embedded applications. With plenty of I/O and...

BeagleBone Black Enclosure - Clear Plastic
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Price: $14.09
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Sparkfun Item #: PRT-12842 -

The BeagleBone Black is a great credit-card-sized development platform with a fast growing community, why would you not want to keep your board safe and sound inside this clear plastic enclosure? These cases protect your BeagleBone Black from things like rogue wires that might short it out while still allowing full access to the board! Simply snap the BBB into the bottom half of the enclosure, then snap the two sides together. As you may have noticed, these enclosures are actually transparent....

Beam Attachment Blocks - 4 pack
Price: $10.61
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Sparkfun Item #: ROB-12492 -

These beam attachment blocks make it possible to connect two Actobotics aluminum beams together or to create simple joint attachment points for mountable channels. These blocks come in packs of 4 and each offers one 6-32 tapped hole 0.30" deep and one 0.14" diameter through-hole for your mounting applications. Documents: SketchUp Part Product Page (585403) ...

Beam Crossover Adapter
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Price: $6.35
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Sparkfun Item #: ROB-12486 -

These beam crossover adapters from are prefect for joining Actobotics aluminum beams or beam blocks to different Actobotics parts to form rigid, yet movable joints or creating complex structures. Every crossover adapter has four 6-32 through-holes to provide you with multiple mounting options. Documents: SketchUp Part Product Page (585490) ...

Bearables Flower Light Sensor
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Price: $11.18
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Sparkfun Item #: SEN-15753 -

A cute flower light sensor to connect to and trigger your Bearables badge. Bearables is a range of woodland-themed wearable LED badges and sensors. Wear the badges on their own, or connect them to one of the sensors with conductive thread to bring them to life. Designed for kids* (suggested age 8+) and grown-up kids alike! Attach the flower light sensor to a Bearables badge and when you cover the sensor or when it's dark your badge's LEDs will light up. *Contains small parts. Not suitable for...

Bearing Mount - Flat (1/4" Bore)
Price: $11.04
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Sparkfun Item #: ROB-12328 -

These flat bearing mounts attach to the face of a channel or plate and have a ball bearing with a 1/4” bore for shafts. They can be used in conjunction with angle brackets to be mounted inside channels or in other configurations. These bearing mounts have a width of 1.31”, a thickness of 0.20”, a 0.25” bore bearing, and utilize the 1.5” hub pattern. Actobotics is a robotics building system based around extruded aluminum channels, gears, precision shafts, and ball bearings. Thanks to the two...

Bearing Mount - Pillow Block (1/4" Bore)
Price: $11.04
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Sparkfun Item #: ROB-12333 -

Pillow block bearing mounts attach to the outside of a channel and can be used as simple hinges. These bearing mounts have a width of 1.32”, a thickness of 0.25”, a 0.25” bore bearing. Actobotics is a robotics building system based around extruded aluminum channels, gears, precision shafts, and ball bearings. Thanks to the two standardized hole patterns, nearly all Actobotics components can be intuitively connected together. The wide range of components makes building complex electromechanical...

Bearing Mount - Pillow Block (3/4" Bore)
Price: $14.72
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Sparkfun Item #: ROB-12110 -

Pillow block bearing mounts attach to the outside of a channel and can be used as simple hinges. These bearing mounts have a width of 1.32”, a thickness of 0.25”, a 0.75” bore bearing. Actobotics is a robotics building system based around extruded aluminum channels, gears, precision shafts, and ball bearings. Thanks to the two standardized hole patterns, nearly all Actobotics components can be intuitively connected together. The wide range of components makes building complex electromechanical...

Bearing Mount - Quad Block (1/4" Bore)
Price: $11.96
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Sparkfun Item #: ROB-12510 -

Quad block bearing mounts attach to the inside of a channel and have a ball bearing with a 1/4” bore for shafts. These bearing mounts have a width of 1.32”, a thickness of 0.25”, a 0.25” bore bearing, and utilize the 0.77” hub pattern. Actobotics is a robotics building system based around extruded aluminum channels, gears, precision shafts, and ball bearings. Thanks to the two standardized hole patterns, nearly all Actobotics components can be intuitively connected together. The wide range of...

Bees Shield for Arduino
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Price: $15.34
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DFRobot Item #: DFR0210 -

Have you ever been in a situation where you need two communication methods for your project? How about when a serial port is occupied by another serial device, and you still need to setup wireless communication?The DFRobot Bees shield can solve these problems. The Bees shield is compatible with Arduino boards such as arduino UNO R3 and arduino Leonardo. It has a large prototyping shield giving you plenty of space to experiment and add extra components to your project. Thanks to this uniform...

Beetle - The Smallest Arduino
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Price: $13.62
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DFRobot Item #: DFR0282 -

Beetle is a extremely the smallest Arduino leonardo board. It derives its core notion from minimalism without compromising functionality.It comes with Atmel AtMega32u4 (datasheet) @16MHz clock time and has expanded amounts of interfaces: 10 digital pins, 5 analog pins and 4 pwn pins. To further make it user-friendly, it is compatible with Micro USB so that direct programming and testing is no longer a headache. Select "Arduino Leonardo (tools &;gt;board &;gt; Arduino Leonardo in Arduino IDE),...

Beetle Shield
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Price: $5.00
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DFRobot Item #: DFR0285 -

The Beetle shield is designed to attach a Beetle (DFR0282) controller for easy connecting servos and sensors.?|Specification| Operating voltage: 3 - 5V Compatible with DFRobot Beetle|Documents| Wiki( Beetle shield)|ShippingList| Beetle Shield x1 ...

Beginner - Basic Kit for Arduino with Guide Book
Price: $28.23
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Elecrow Item #: EL-ACK02124K -

    This Bacis Kit for Arduino is the perfect kit for you to dive into the electronics and Arduino world. It includes the most popular accessories for a first-time user to learn about the Arduino hardware, software and general electronics theory. The detailed guide book, which includes 13 step-by-step basic experiments, helps you creating small, simple, and easy-to-assemble circuits. It is straight forward, includes diagrams, codes, explanations, and additional...

Beginner Kit for Arduino (Best Starter Kit)
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Price: $91.19
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DFRobot Item #: DFR0100 -

Welcome to the electronic interaction world! DFRobot proudly presents the Arduino Beginner/Starter Kit for those who are interested in learning about Arduino and electronics. Starting from basic LED control to more advanced environmental sensing, monitoring and actuators. This kit will guide you through the world of the sensing, controlling the physical world through sensors and arduino microcontroller via carefully designed project. The new version comes with 20 high quality components and 15...

Bend Labs Digital Flex Sensor - 1-Axis, 4 Inch
Price: $112.91
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Sparkfun Item #: SEN-15244 -

The Bend Labs Digital Flex Sensors are an innovative solution for measuring motion, providing a unique alternative to existing sensor technologies for measuring a highly accurate and drift-free angular displacement in a soft form factor while maintaining extremely low power consumption. Constructed using highly durable, medical grade silicone elastomers, this is a single axis bidirectional flex sensor which measures one angle for 2D orientation. Its low-power, integrated analog front end, with...

Bend Labs Digital Flex Sensor - 2-Axis, 4 Inch
Price: $285.82
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Sparkfun Item #: SEN-15245 -

The Bend Labs Digital Flex Sensors are an innovative solution for measuring motion, providing a unique alternative to existing sensor technologies for measuring a highly accurate and drift-free angular displacement in a soft form factor while maintaining extremely low power consumption. Constructed using highly durable, medical grade silicone elastomers, this is a two axis bidirectional sensor which measures two angles in orthogonal planes for 3D orientation. Where previous flex sensors...

Bendable EL Wire - Blue 3m
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Price: $19.41
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Sparkfun Item #: COM-14697 -

Do you love EL wire but wish it was more bendable? Well look no further! This EL Wire contains a special bendable wire core that allows you to articulate and mold your EL wire any way that you want! EL wire, or electroluminescent wire, is a flexible wire coated in phosphor. Apply the appropriate voltage and it lights up! It looks a lot like a thin flexible neon tube. The bendable wire runs alongside the phosphor wire, making the product nearly twice the thickness of the non-bendable variety....

Bendable EL Wire - Blue-Green 3m
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Sparkfun Item #: COM-14702 -

Do you love EL wire but wish it was more bendable? Well look no further! This EL Wire contains a special bendable wire core that allows you to articulate and mold your EL wire any way that you want! EL wire, or electroluminescent wire, is a flexible wire coated in phosphor. Apply the appropriate voltage and it lights up! It looks a lot like a thin flexible neon tube. The bendable wire runs alongside the phosphor wire, making the product nearly twice the thickness of the non-bendable variety....

Bendable EL Wire - Fluorescent Green 3m
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Price: $19.41
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Sparkfun Item #: COM-14699 -

Do you love EL wire but wish it was more bendable? Well look no further! This EL Wire contains a special bendable wire core that allows you to articulate and mold your EL wire any way that you want! EL wire, or electroluminescent wire, is a flexible wire coated in phosphor. Apply the appropriate voltage and it lights up! It looks a lot like a thin flexible neon tube. The bendable wire runs alongside the phosphor wire, making the product nearly twice the thickness of the non-bendable variety....

Bendable EL Wire - Green 3m
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Price: $19.41
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Sparkfun Item #: COM-14698 -

Do you love EL wire but wish it was more bendable? Well look no further! This EL Wire contains a special bendable wire core that allows you to articulate and mold your EL wire any way that you want! EL wire, or electroluminescent wire, is a flexible wire coated in phosphor. Apply the appropriate voltage and it lights up! It looks a lot like a thin flexible neon tube. The bendable wire runs alongside the phosphor wire, making the product nearly twice the thickness of the non-bendable variety....

Bendable EL Wire - Pink 3m
Price: $19.41
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Sparkfun Item #: COM-14704 -

Do you love EL wire but wish it was more bendable? Well look no further! This EL Wire contains a special bendable wire core that allows you to articulate and mold your EL wire any way that you want! EL wire, or electroluminescent wire, is a flexible wire coated in phosphor. Apply the appropriate voltage and it lights up! It looks a lot like a thin flexible neon tube. The bendable wire runs alongside the phosphor wire, making the product nearly twice the thickness of the non-bendable variety....

Bendable EL Wire - Purple 3m
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Price: $19.41
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Sparkfun Item #: COM-14700 -

Do you love EL wire but wish it was more bendable? Well look no further! This EL Wire contains a special bendable wire core that allows you to articulate and mold your EL wire any way that you want! EL wire, or electroluminescent wire, is a flexible wire coated in phosphor. Apply the appropriate voltage and it lights up! It looks a lot like a thin flexible neon tube. The bendable wire runs alongside the phosphor wire, making the product nearly twice the thickness of the non-bendable variety....

Bendable EL Wire - Red 3m
Price: $19.41
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Sparkfun Item #: COM-14703 -

Do you love EL wire but wish it was more bendable? Well look no further! This EL Wire contains a special bendable wire core that allows you to articulate and mold your EL wire any way that you want! EL wire, or electroluminescent wire, is a flexible wire coated in phosphor. Apply the appropriate voltage and it lights up! It looks a lot like a thin flexible neon tube. The bendable wire runs alongside the phosphor wire, making the product nearly twice the thickness of the non-bendable variety....

Bendable EL Wire - White 3m
Price: $19.41
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Sparkfun Item #: COM-14706 -

Do you love EL wire but wish it was more bendable? Well look no further! This EL Wire contains a special bendable wire core that allows you to articulate and mold your EL wire any way that you want! EL wire, or electroluminescent wire, is a flexible wire coated in phosphor. Apply the appropriate voltage and it lights up! It looks a lot like a thin flexible neon tube. The bendable wire runs alongside the phosphor wire, making the product nearly twice the thickness of the non-bendable variety....

Bendable EL Wire - Yellow 3m
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Price: $19.41
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Sparkfun Item #: COM-14701 -

Do you love EL wire but wish it was more bendable? Well look no further! This EL Wire contains a special bendable wire core that allows you to articulate and mold your EL wire any way that you want! EL wire, or electroluminescent wire, is a flexible wire coated in phosphor. Apply the appropriate voltage and it lights up! It looks a lot like a thin flexible neon tube. The bendable wire runs alongside the phosphor wire, making the product nearly twice the thickness of the non-bendable variety....

Big Dome Pushbutton - Blue
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Price: $21.18
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Sparkfun Item #: COM-11274 -

It's the end of the world, and you need a button to press. This is it. A 100mm diameter (outside diameter) dome illuminated push button comes with an LED, securing nut and a pre-installed long life horizontal microswitch. Button can also be adjusted to a low profile button by removing the middle ring. Features: LED indicator light runs at 12VDC Bulb holder is easy to install or remove 3 Terminals Button Actuator microswitch included Microswitch reliability tested to 10,000,000...

Big Dome Pushbutton - Green
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Price: $21.18
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Sparkfun Item #: COM-11275 -

It's the end of the world, and you need a button to press. This is it. A 100mm diameter (outside diameter) dome illuminated push button comes with an LED, securing nut and a pre-installed long life horizontal microswitch. Button can also be adjusted to a low profile button by removing the middle ring. Features: LED indicator light runs at 12VDC Bulb holder is easy to install or remove 3 Terminals Button Actuator microswitch included Microswitch reliability tested to 10,000,000...

Big Dome Pushbutton - Red
Price: $21.57
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Sparkfun Item #: COM-09181 -

It's the end of the world, and you need a button to press. This is it. A 100mm diameter (outside diameter) dome illuminated push button comes with an LED, securing nut and a pre-installed long life horizontal microswitch. Button can also be adjusted to a low profile button by removing the middle ring. Features: LED indicator light runs at 12VDC Bulb holder is easy to install or remove 3 Terminals Button Actuator microswitch included Microswitch reliability tested to 10,000,000...

Big Dome Pushbutton - Yellow
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Price: $21.18
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Sparkfun Item #: COM-11273 -

It's the end of the world, and you need a button to press. This is it. A 100mm diameter (outside diameter) dome illuminated push button comes with an LED, securing nut and a pre-installed long life horizontal microswitch. Button can also be adjusted to a low profile button by removing the middle ring. Features: LED indicator light runs at 12VDC Bulb holder is easy to install or remove 3 Terminals Button Actuator microswitch included Microswitch reliability tested to 10,000,000...

Big Easy Driver
Price: $36.02
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Sparkfun Item #: ROB-12859 -

The Big Easy Driver, designed by Brian Schmalz, is a stepper motor driver board for bi-polar stepper motors up to a max 2A/phase. It is based on the Allegro A4988 stepper driver chip. It's the next version of the popular Easy Driver board. Each Big Easy Driver can drive up to a max of 2A per phase of a bi-polar stepper motor. It is a chopper microstepping driver which defaults to 16 step microstepping mode. It can take a maximum motor drive voltage of around 30V, and includes on-board 5V/3.3V...

Big Red Box - Enclosure
Price: $15.86
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Sparkfun Item #: PRT-11366 -

This is the Big Red Box! These beefy, bright red, flanged, plastic enclosures will give your widget the protection (and attention) it deserves. You've probably seen these used to enclose radio equipment or antenna baluns as they can be secured to a pole using U-bolts (not included). At about 3mm thick, this 74x158x90mm enclosure has plenty of space for gizmos, gadgets, widgets and doohickeys. The mounting flanges extend 19mm from either edge with two 50mm-spaced 7mm diameter holes. There's a...

Binding Post - Black
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Price: $0.71
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Sparkfun Item #: PRT-09740 -

This is a black insulated binding post. These binding posts do accept banana plugs, and are a great way to connect single-wire leads. The colored cap screws up and down, and is designed to clamp on the connecting wire. These binding posts are sold individually. We also carry a similar red binding post.

Binding Post - Red
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Price: $0.71
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Sparkfun Item #: PRT-09739 -

This is a red insulated binding post. These binding posts do accept banana plugs, and are a great way to connect single-wire leads. The colored cap screws up and down, and is designed to clamp on the connecting wire. These binding posts are sold individually. We also carry a similar black binding post.

Binho Breadboard Breakout
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Price: $5.98
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Sparkfun Item #: BOB-16419 -

The Binho Breadboard Breakout breaks a male 2x5 1.27mm connector out to breadboard-friendly 2.54mm / 0.1in pitch headers. It's an easy way to interface your Binho Nova host adapter with other circuits using standard jumper wires as well. The board measures 14mm x 18mm x 7mm and is black with white silkscreen labels for each of the pins. The SMT connector comes soldered to the board but you'll need to install the headers (included) yourself. Note: Each Binho Nova Host Adapter includes one of...

Binho Nova Multi-Protocol USB Host Adapter
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Price: $310.19
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Sparkfun Item #: DEV-16382 -

The Binho Nova Multi-Protocol USB Host Adapter allows one to interface their computer directly to hardware circuits. This device is powered by the USB connection to the host PC and is also able to provide downstream power to test circuits. The Binho Nova Multi-Protocol USB Host Adapter features 5 signal pins, one x 3v3 pin, one x VUSB pin, and three x GND pins on its 10pin wire harness. The wire harness terminates with a female 1.27mm 2x5 IDC connector. In IO Mode, the five signal pins can be...

Binho Qwiic Interface Board
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Price: $16.13
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Sparkfun Item #: BOB-16420 -

The Binho Qwiic Interface Board makes it easy for you to interface your Binho Nova host adapter with up to four strings of Qwiic devices. It also breaks out all of the pins to a series of headers for convenient jumping to other circuits or perhaps your Logic Analyzer to monitor everything while you develop and debug. With a wide range of Qwiic sensors and devices to choose from, the Binho Qwiic Interface Board is the simplest way to connect your Binho Nova Host Adapter to the SparkFun Qwiic...

Biomedical Sensor Pad (10 pack)
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Price: $14.09
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Sparkfun Item #: SEN-12969 -

This is a 10 pack of Biomedical Sensor Pads, disposable electrodes that can be used to measure EEG, ECG and EMG levels. these little pads are perfect for short-term monitoring of Neurofeedback and Biofeedback purposes. They are to be used once and are very handy because of integrated, latex-free gel. Each pad adheres very well to the skin and the snap connector can be pushed on or removed from the electrode lead with no issue. Note: This product is NOT a medical device and is not intended to...