Adafruit

US$4.38
Connect your own PCB to a Raspberry Pi B+ and stack on top with this normal-height female header with extra long pins.
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US$2.63
Connect your own PCB to a Raspberry Pi B+ with this normal-height female header.
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US$10.42
We fit seven of our the tiny 5050 (5mm x 5mm) smart RGB LEDs onto a beautiful, round PCB with mounting holes and a chainable design to create what we think is our most elegant (and evening-wear appropriate) NeoPixel board yet.
Delivery within 2-3 weeks
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US$17.42
Convert just about any battery pack to 5V with VERTER - our fresh new Buck-Boost power converter. VERTER can take battery voltages from 3-12VDC and output a nice 5V DC, which makes it a perfect universal power supply for your portable project!
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US$13.92
Digits have seven white segments on a black surface and we give you a set of two alphanumeric displays in a pack so you can make a clock or a four letter word.
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US$16.35
This super small mono amplifier is surprisingly powerful - able to deliver up to 2.5 Watts into 4-8 ohm impedance speakers. Inside the miniature chip is a class D controller, able to run from 2.0V-5.5VDC.
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US$12.17
It's an add on prototyping Pi Cobbler from Adafruit specifically designed for the B+ and Pi 2 that you can break out all those tasty power, GPIO, I2C and SPI pins from the 40-pin header onto a solderless breadboard. This will make "cobbling together" prototypes with the Pi super easy.
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US$12.25
The T-Cobbler Plus is an add on prototyping board from Adafruit specifically designed for the B+, Pi 2 and Pi 3 that can break out all those tasty power, GPIO, I2C and SPI pins from the 40-pin header onto a solderless breadboard. This set will make "cobbling together" prototypes with the Pi super easy.
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US$6.92

This product comes with one 0.8mm carbide end mill in a protective plastic case. Total length: 38mm. 1/8" Shank. Diameter: 0.8mm. 

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US$6.92

This product comes with one 0.7mm carbide end mill in a protective plastic case. Total length: 38mm. 1/8" Shank. Diameter: 0.7mm. 

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US$6.92

This product comes with one 0.6mm carbide end mill in a protective plastic case. Total length: 38mm. 1/8" Shank. Diameter: 0.6mm. 

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US$6.92

This product comes with one 0.5mm carbide end mill in a protective plastic case. Total length: 38mm. 1/8" Shank. Diameter: 0.5mm. 

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US$19.25
A gyroscope is a type of sensor that can sense twisting and turning motions. Often paired with an accelerometer, you can use these to do 3D motion capture and inertial measurement.
Delivery within 2-3 weeks
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US$7.95
Measuring approx 1" x 6", this standard-thickness FR4, gold plate ruler has the most common component packages you'll encounter. It also has font size guide, trace-width diagram, and a set of AWG-sized drills so you can gauge your wire thicknesses.
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US$9.53
Ideally, this backpack is for use with the 3.3V Pro Trinket, so that the battery voltage (3.7V-4.2V) will get regulated down to 3.3V on the Pro Trinket board. However, many times, you can run a 5V Pro Trinket + accessories off of the ~4V from the LiPoly battery with no problem.
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