Sparkfun

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US$224.95
The SparkFun Simultaneous RFID Reader is an Arduino-compatible board to get you started with the M6E Nano UHF RFID Reader. Radio Frequency Identification (RFID) is becoming popular everywhere for tracking practically everything. Whether you want to get started by adding an RFID reader on your toolbox with tags on all your tools or allowing access to the tree house for your secret society meetings, this board may be for you!
Delivery within 1-2 weeks
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US$6.95
This is a very small, extremely lightweight battery based on Lithium Ion chemistry, with the highest energy density currently in production. Each cell outputs a nominal 3.7V at 400mAh! Comes terminated with a standard 2-pin JST-PH connector with 2mm spacing between pins. These batteries require special charging; do not attempt to charge these with anything but a specialized Lithium Polymer charger.
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US$17.95
The SparkFun Servo Trigger is a small robotics board that simplifies the control of hobby RC servo motors. When an external switch or logic signal changes state, the Servo Trigger is able to tell an attached servo motor to move from position A to position B. To use the Servo Trigger, you simply connect a hobby servo and a switch, then use the on-board potentiometers to adjust the start/stop positions and the transition time. You can use a hobby servos in your projects without having to do any programming!
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US$9.95
These are very slim, extremely light weight batteries based on Lithium Ion chemistry. Each cell outputs a nominal 3.7V at 850mAh! Comes terminated with a standard 2-pin JST-PH connector - 2mm spacing between pins. These batteries require special charging. Do not attempt to charge these with anything but a specialized LiPo charger. Battery includes built-in protection against over voltage, over current, and minimum voltage.
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US$0.70
This is a 2-pin JST RCY connector typically used for low-voltage applications running 10A or less. They are commonly found in RC vehicles. These come in a bag of 1 male plug, 1 female plug, plus pins to connect them both. The pins crimp to your cable and are inserted into the housing.
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US$19.95
SparkFun’s nRF52832 Breakout provides easy access to all of the chip’s features. It breaks out all of the nRF52’s I/O pins, provides a 32.768kHz RTC crystal, a user-programmable button and LED, and a trace antenna to send and receive those 2.4GHz transmissions. Plus, to make the chip as easy-to-flash as possible, the breakout comes pre-programmed with a serial bootloader.
Delivery within 1-2 weeks
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US$4.95
These are our small, beefy aluminum enclosures, which have been built tough enough to withstand a truck. This 2mm-thick, die-cast enclosure is rated IP54 against dust and splashing water. Because it’s aluminum, it’s easy to cut and drill so that you can add LCD screens, buttons and cable connections. If you want to “pretty up” your project, hit this with some fine-grit sand paper and buff it or just spray paint it!
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US$4.95
This is a joystick very similar to the ‘analog’ joysticks on PlayStation 2 controllers. Directional movements are simply two potentiometers - one for each axis. Pots are ~10k each. This joystick also has a select button that is actuated when the joystick is pressed down. The joystick comes mounted on a breakout board and the pins are broken out to a 0.1" header and includes 4 mounting holes in the corners.
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US$12.95
Introducing the 3.3V SparkFun FT231X Breakout board, complete with the full UART hardware handshake feature! The pin-out of this board matches the FTDI cable to work with official Arduino and cloned 3.3V Arduino boards. It can also be used for general serial applications.
Delivery within 1-2 weeks
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US$38.95
The SparkFun AutoDriver board is based on the STMicro L6470 dSPIN stepper motor driver. This powerful chip allows you to control a stepper motor with a voltage from 8 to 45V at 3Arms over an SPI connection. The AutoDriver board has been designed to be easily integrated into a project, even with multiple boards. Just connect your motors and your SPI-capable microcontroller and get steppin'!
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US$10.49
This breakout board makes it easy to use the tiny MMA8452Q accelerometer in your project. The MMA8452Q is a smart, low-power, three-axis, capacitive MEMS accelerometer with 12 bits of resolution. This accelerometer is packed with embedded functions with flexible user-programmable options, configurable to two interrupt pins. Embedded interrupt functions allow for overall power savings relieving the host processor from continuously polling data.
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US$8.95
Your 5V system can wield great power with this big, beefy relay board. How does 10A on the NC contacts and 20A on the NO contacts at 220VAC sound? The SparkFun Beefcake Relay Control Kit contains all the parts you need to get your high-power load under control. Only minimal assembly is required! The heart of the board is a sealed, SPDT 20A/10A Relay. The relay is controlled by 5V logic through a transistor, and an LED tells you when the relay is closed.
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US$26.95
The MyoWare LED Shield is designed to pair with the MyoWare Muscle Sensor. The blue 10-segment bar graph shows the magnitude of the measured signal. The more muscle activation measured, the higher up the board the lit LEDs will go. With this shield you will be provided with a visual representation of the signals provided by the MyoWare Muscle Sensor and an on-board lithium polymer (LiPo) power source.
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US$19.95
The SparkFun Battery Babysitter is an all-in-one single-cell Lithium Polymer (LiPo) battery manager. It’s half battery charger, half battery monitor, and all you’ll ever need to keep your battery-powered project running safely and extensively. The Battery Babysitter features a pair of Texas Instruments LiPo-management ICs: a BQ24075 battery charger and a BQ27441-G1A fuel gauge. The charger supports adjustable charge rates of up to 1.5A, as well as USB-compliant 100mA and 500mA options.
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US$4.95
This is a very small, extremely light weight battery based on the new Polymer Lithium Ion chemistry. This is the highest energy density currently in production. Each cells outputs a nominal 3.7V at 110mAh! Comes terminated with a standard 2-pin JST-PH connector - 2mm spacing between pins. 
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