Adafruit

1 2 3 4 5 6 7 8 9 10 11
5 - 19
US$17.42
This little circuit board may look tiny but inside is a high efficiency DC/DC step-down converter which can output up to 3 Amp at 5V without the need of any heat-sink or forced cooling. (It does get a bit toasty at 3A though) This UBEC is designed to replace a 5V supply in RC planes and 'copters but its also great for any kind of microcontroller or electronics project that runs off of 5V.
In stock
+
Add to wish list

US$53.82
Rather than spending weeks or months fiddling with algorithms of varying accuracy and complexity, you can have meaningful sensor data in minutes thanks to the BNO055 - a smart 9-DOF sensor that does the sensor fusion all on its own!  You can read the data right over I2C and Bob's yer uncle.
In stock
+
Add to wish list

US$29.95

The fastest way to add audio effects to a project, with a small footprint. We think this is the best sound board for props and costumes! The Sound Board has a lot of amazing features that make it the easiest thing ever: No Arduino or other microcontroller required! It is completely stand-alone, just needs a 3 to 5.5VDC battery, Small - only 1.5" x 0.9", and much more.

Delivery within 1-2 weeks
+
Add to wish list

US$13.93

The cable is easiest way ever to connect to your microcontroller/Raspberry Pi/WiFi router serial console port. Inside the big USB plug is a USB<->Serial conversion chip and at the end of the 36" cable are four wire - red power, black ground, white RX into USB port, and green TX out of the USB port. The power pin provides the 5V @ 500mA direct from the USB port and the RX/TX pins are 3.3V level for interfacing with the most common 3.3V logic level chipsets.

In stock
+
Add to wish list

US$34.13
These displays are small, only about 1" diameter, but very readable due to the high contrast of an OLED display. This display is made of 128x64 individual white OLED pixels, each one is turned on or off by the controller chip.
In stock
+
Add to wish list

US$26.17
This is the perfect power supply for your portable project! With a built-in battery charger circuit, you'll be able to keep your project running even while recharging the battery! This little DC/DC boost converter module can be powered by any 3.7V LiIon/LiPoly battery, and convert the battery output to 5.2V DC for running your 5V projects.
Delivery within 1-2 weeks
+
Add to wish list

US$27.25
With this shield you can make a cool Arduino robot, maybe a hexapod walker, or maybe just a piece of art with a lot of moving parts.
In stock
+
Add to wish list

US$2.02
The heat sink is a 0.26" x 0.26" (6.75mm x 6.75mm) square with 3 tall 'fins' sticking out the top. The total height is 0.39" (10mm) but you can easily file it down if you need a shorter heat sink to fit in a case).
In stock
+
Add to wish list

US$12.17
Finally, a way to get up to 8 same-address I2C devices hooked up to one microcontroller - this multiplexer acts as a gatekeeper, shuttling the commands to the selected set of I2C pins with your command.
In stock
+
Add to wish list

US$69.92
This is the easiest way possible to add small, bright RGB pixels to your project. We took the same technology from our Flora NeoPixels and made them breadboard friendly, with two rows of 3 x 0.1" spaced header on each side for easy soldering, chaining and breadboarding. These ultra-bright LEDs have a constant-current driver cooked right into the LED package!
In stock
+
Add to wish list

US$14.00
They are 940nm wavelength, which is what nearly all devices listen to. They're 20 degree beamwidth, and work great for any kind of remote control application. 
Delivery within 1-2 weeks
+
Add to wish list

US$31.42
This SHARP distance sensor bounces IR off objects to determine how far away they are. It returns an analog voltage that can be used to determine how close the nearest object is. Comes with 12" long 3-JST interface wire. These sensors are good for detection between 20cm-150cm. For over 1 m distance, we suggest using sonar sensors.
In stock
+
Add to wish list

US$12.45
This has a wide usage range, from +-2g up to +-8g yet is easy to use with Arduino or another microcontroller.
In stock
+
Add to wish list

US$13.13

This breakout board has a microSD card slot for providing extra storage memory when required.

In stock
+
Add to wish list

US$4.38
This is a blank MiFare Classic 'laundry' tag - often used for laundry or identification but also found in other systems where a small proximity card is desired. The tag contains a NXP S50 chip and an antenna, and is passively powered by the reader/writer when placed a couple inches away.
In stock
+
Add to wish list
1 2 3 4 5 6 7 8 9 10 11
5 - 19