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PRT-13060 Terminal Block - 3 Position (15A, 600V)
US$3.43
Each 3 position block offers a screw pitch of 10mm with a max current of 15A and a max voltage tolerance of 600V before risking meltdown or implosion.
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COM-13013 Mini Microswitch - SPDT (Lever, 2-pack)
US$5.53
This is a 3-terminal microswitch two pack, each equipped with a 17mm lever actuator. These switches have a great ‘clicky’ sound to them with a nice tactile feel and are perfect when used for a slider, 3D printer, or robot project. Each microswitch is rated for 5A at 250VAC.
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PRT-12978 Alligator Test Leads - Multicolored (10 Pack)
US$5.53
Each lead in this pack of ten is 50cm long with a rubber shrouded alligator clip on each end. There are five different colors, you get two each of: red, green, white, black and yellow.
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COM-13004 microSD USB Reader
US$7.81
This is an awesome little microSD USB reader. Just slide your microSD card into the inside of the USB connector, then stick this into a USB port and the card’s contents will pop up on your computer. 
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COM-12999 LED - RGB Addressable, PTH, 5mm Clear (5 Pack)
US$4.92
This is a PTH Addressable RGB LED with a WS2812 control IC built right into the LED.
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WRL-12847 XBee Shield
US$34.93
Xbee radios are an awesome way to add wireless capability to your Arduino project and now it’s even easier with the XBee Shield. The shield form-factor mates directly with any dev board that has an Arduino standard footprint and equips it with wireless communication capabilities using the popular XBee module. 
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SEN-12909 Pressure Sensor - MS5803-14BA Breakout
US$83.93
This is the MS5803-14BA Pressure Sensor Breakout, a high resolution pressure sensor with both an I2C and SPI interface. This MEMS pressure sensor measures the absolute pressure of the fluid around it which includes air, water, and anything else that acts like a viscous fluid.
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COM-12986 LED - RGB Addressable, PTH, 5mm Diffused (5 Pack)
COM-12986 LED - RGB Addressable, PTH, 5mm Diffused (5 Pack)
US$4.92
These are PTH Addressable RGB LEDs with a WS2812 control IC built right into the them.
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CAB-12970 Sensor Cable - Electrode Pads (3 connector)
CAB-12970 Sensor Cable - Electrode Pads (3 connector)
US$8.78
This is your simple three conductor sensor cable with electrode pad leads. These cables are 24" long and feature a 3.5mm audio jack connector on one end with snap style receptacles for biomedical sensor pads.
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SEN-12969 Biomedical Sensor Pad (10 pack)
SEN-12969 Biomedical Sensor Pad (10 pack)
US$12.54
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.
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PRT-12769 SD/MMC Socket
PRT-12769 SD/MMC Socket
US$4.19
SD cards are all over the place and they’re great for storing large amounts of data. Why not take advantage by adding an SD socket to your next data heavy project. We use it on a whole bunch of our boards! The SD/MMC ( Secure Digital Disk / Multi Media Cards) cards use a very simple SPI serial bus as well as a 4-bit proprietary bus.
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BOB-12941 SD/MMC Card Breakout
BOB-12941 SD/MMC Card Breakout
US$15.06
With SD and MMC memory prices dropping, the time is right for mass storage and datalogging. This breakout board will allow you to breakout the SD/MMC socket to a standard .1" 10-pin header. Perfect for breadboarding and the likes. Board comes fully assembled and tested as shown.
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WRL-11812 XBee Explorer USB
WRL-11812 XBee Explorer USB
US$39.05
This is a simple to use, USB to serial base unit for the Digi XBee line. This unit works with all XBee modules including the Series 1 and Series 2.5, standard and Pro version. Plug the unit into the XBee Explorer, attach a mini USB cable, and you will have direct access to the serial and programming pins on the XBee unit.
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WRL-12861 Interface Cable - SMA Female to SMA Male (25cm)
WRL-12861 Interface Cable - SMA Female to SMA Male (25cm)
US$7.53
This is a basic SMA (Sub-Miniature A) male to female connector cable. Each cable is 25cm (9.8") long and has a 50Ω impedance that can handle frequencies up to 17 GHz. 
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COM-12877 LED - RGB Addressable, PTH, 8mm (5 Pack)
COM-12877 LED - RGB Addressable, PTH, 8mm (5 Pack)
US$5.25

If you are looking for a great addressable LED in the more common LED form factor, then this is the perfect choice for you. Features: Power Supply: DC 4.5V - 6V. Internal Frequency: 800K Hz. Single Wire Single Transmission.

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