The Adafruit Trinket M0 may be small, but do not be fooled by its size! It's a tiny microcontroller board, built around the Atmel ATSAMD21, a little chip with a lot of power. We wanted to design a microcontroller board that was small enough to fit into any project, and low cost enough to use without hesitation. Perfect for when you don't want to give up your expensive dev-board and you aren't willing to take apart the project...

Deprecation Warning: The Trinket bit-bang USB technique it uses doesn't work as well as it did in 2014, many modern computers won't work well. So while we still carry the Trinket so that people can maintain some older projects, we no longer recommend it. Please check out the Trinket M0. It has built-in USB, more capabilities, and is comparable in price! Trinket may be small, but do not be fooled by its size! It's a tiny...

Make your Arduino-based project tiny and with the Adafruit METRO Mini ! The METRO Mini works great with the Arduino IDE, and runs the ATmega328P at 16MHz so it is pin-compatible with Arduino UNO R3 - note you won't be able to plug in shields, but great for use with breadboards. You can use this with the Arduino IDE (both desktop and cloud version) by selecting 'Arduino UNO' in the Boards menu. We sure love the ATmega328 here at...

What's smaller than a Feather but larger than a Trinket? It's an ItsyBitsy! Small, powerful, Arduino-compatible - this microcontroller board is perfect when you want something very compact, but still with a bunch of pins. ItsyBitsy is only 1.4" long by 0.7" wide, but has 6 power pins, 6 analog & digital pins and 17 digital pins. It packs much of the same capability as an Arduino UNO. So it's great once you've...

The Adafruit Gemma M0 is a super small microcontroller board, with just enough built-in to create many simple projects. It may look small and cute: round, about the size of a quarter, with friendly alligator-clip sew pads. But do not be fooled! The Gemma M0 is incredibly powerful! We've taken the same form factor we used for the original ATtiny85-based Gemma and gave it an upgrade. The Gemma M0 has swapped out the lightweight...

Deprecation Warning: The Trinket bit-bang USB technique it uses doesn't work as well as it did in 2014, many modern computers won't work well. So while we still carry the Trinket so that people can maintain some older projects, we no longer recommend it. Please check out the Trinket M0. It has built-in USB, more capabilities, and is comparable in price! Trinket may be small, but do not be fooled by its size! It's a tiny...

Deprecation Warning: The Pro Trinket bit-bang USB technique it uses doesn't work as well as it did in 2014, many modern computers won't work well. So while we still carry the Pro Trinket so that people can maintain some older projets, we no longer recommend it. Please check out the Metro Mini (ATmega328 @ 5V 16 MHz), ItsyBitsy 32u4 5V 16MHz, ItsyBitsy 32u4 @ 3.3V 8MHz or ItsyBitsy M0 @ 3V 48MHz. All have built-in USB and are comparable...

What's smaller than a Feather but larger than a Trinket? It's an Adafruit ItsyBitsy M0 Express ! Small, powerful, with a rockin' ATSAMD21 Cortex M0 processor running at 48 MHz - this microcontroller board is perfect when you want something very compact, but still with a bunch of pins. ItsyBitsy M0 Express is only 1.4" long by 0.7" wide, but has 6 power pins, 23 digital GPIO pins (11 of which can be analog in, 1x analog out,...

Long gone are the days of parallel ports and serial ports. Now the USB port reigns supreme! But USB is hard, and you just want to transfer your every-day serial data from a microcontroller to computer. What now? Enter the Adafruit CP2104 Friend ! This is a high-quality CP2104 USB-Serial chip that can upload code at a blistering 2Mbit/s for fast development time. It also has auto-reset for Arduino/ATmega328 boards so no noodling with pins and...

What's Metro shaped and has an ESP32-S2 WiFi module? What has a STEMMA QT connector for I2C devices, and a Lipoly charger circuit? What's finishing up testing and nearly ready for fabrication? That's right - its the new Adafruit Metro ESP32-S2! With native USB and a load of PSRAM this board is perfect for use with CircuitPython or Arduino, to add low-cost WiFi while keeping shield-compatibility Features: ESP32-S2 240MHz Tensilica...

This is the  Adafruit METRO Arduino-Compatible - with headers.  It's a fully assembled and tested microcontroller and physical computing board with through-hole headers attached.  If you don't want a Metro with the headers attached for super-slimness, check out our Metro without Headers. The METRO works great with the Arduino IDE, and runs the ATmega328P at 16MHz so it is shape and pin-compatible with...

Note: These use genuine FTDI chips, either we purchase them or they are manufactured to our specifications with the requirement of genuine FTDI chips 10/22/14 - read more. Long gone are the days of parallel ports and serial ports. Now the USB port reigns supreme! But USB is hard, and you just want to transfer your every-day serial data from a microcontroller to computer. What now? Enter the FTDI Friend! The FTDI Friend is a tweaked out FTDI...

FLORA is Adafruit's fully-featured wearable electronics platform. It's a round, sewable, Arduino-compatible microcontroller designed to empower amazing wearables projects.FLORA comes with Adafruit's support, tutorials and projects. Check out dozens of FLORA tutorials on the Adafruit Learning System, with more added all the time! The FLORA is small (1.75" diameter, weighing 4.4 grams). The FLORA family also has the best stainless...

Just about all electronics use TTL serial for debugging, bootloading, programming, serial output, etc. But it's rare for a computer to have a serial port anymore. This is a USB to TTL serial cable, with a FTDI FT232RL usb/serial chip embedded in the head. It has a 6-pin socket at the end with 5V power and ground, as well as RX, TX, RTS and CTS at 3V logic levels. These are perfect for use with a Boarduino, Meggy's, or other Arduino...

We sure love the ATmega328 here at Adafruit, and we use them  a lot  for our own projects. The processor has plenty of GPIO, Analog inputs, hardware UART SPI and I2C, timers and PWM galore - just enough for most simple projects. When we need to go small, we use a Metro Mini or a Trinket M0, but when size isn't as much of a concern, we reach for an Adafruit METRO. New! We've updated this product to our Adafruit Metro 328, a...

Are you ready? Really ready? Cause here comes the fastest, most powerful Metro ever. The Adafruit Metro M4 featuring the Microchip ATSAMD51 . This Metro is like a bullet train, with it's 120MHz Cortex M4 with floating point support. Your code will zig and zag and zoom, and with a bunch of extra peripherals for support, this will for sure be your favorite new chipset. To start off our ATSAMD51 journey we decided to kick it off with the...

What's smaller than a Feather but larger than a Trinket? It's an Itsy Bitsy! Small, powerful, Arduino-compatible - this microcontroller board is perfect when you want something very compact, but still with a bunch of pins. Itsy Bitsy is only 1.4" long by 0.7" wide, but has 6 power pins, 6 analog & digital pins and 17 digital pins. It packs much of the same capability as an Arduino UNO or Feather 32u4. So it's great once...

Are you ready? Really ready? Cause here comes the Adafruit Grand Central featuring the Microchip ATSAMD51 . This dev board is so big, it's not named after a Metro train, it's a whole freakin' station ! This board is like a freight train, with its 120MHz Cortex M4 with floating point support. Your code will zig and zag and zoom, and with a bunch of extra peripherals for support, this will for sure be your favorite new chipset. The...

Metro is our series of microcontroller boards for use with the Arduino IDE. This new Metro M0 Express board looks a whole lot like our original Metro 328, but with a huge upgrade. Instead of the ATmega328, this Metro features a ATSAMD21G18 chip, an ARM Cortex M0+. It's our first Metro that is designed for use with CircuitPython! CircuitPython is our beginner-oriented flavor of MicroPython - and as the name hints at, its a small but...

Deprecation Warning: The Gemma bit-bang USB technique it uses doesn't work as well as it did in 2014, many modern computers won't work well. So while we still carry the Gemma so that people can maintain some older projects, we no longer recommend it. Please check out the Gemma M0. It has built-in USB, more capabilities, and is comparable in price! Love FLORA but want a bite-sized version? Look no further, GEMMA is a tiny wearable...

Give your next project a lift with AirLift - our witty name for the ESP32 co-processor that graces this Metro M4. You already know about the  Adafruit Metro M4  featuring the  Microchip ATSAMD51 , with it's 120MHz Cortex M4 with floating point support. With a train-load of FLASH and RAM, your code will be fast and roomy. And what better way to improve it than to add wireless? Now cooked in directly on board, you get a...

Interested in making neat stuff with an Arduino-compatible board but not sure where to start? This kit includes all the pieces needed to complete over 20 different circuit and projects. Basically everything you need to be playing within minutes of its arrival. No soldering required, works with Mac, Windows and Linux! New! As of March 28, 2018 we've done a big refresh on this kit, to add more stuff like a character LCD, Infrared remote and...

Interested in making neat stuff with an Arduino-compatible board but not sure where to start? This kit includes all the pieces needed to complete over 20 different circuit and projects. Basically everything you need to be playing within minutes of its arrival. No soldering required, works with Mac, Windows and Linux! This item is the same exact kit as https://www.adafruit.com/product/170 This pack includes the Adafruit Metro. METRO is the...

Deprecation Warning: The Pro Trinket bit-bang USB technique it uses doesn't work as well as it did in 2014, many modern computers won't work well. So while we still carry the Pro Trinket so that people can maintain some older projets, we no longer recommend it. Please check out the Metro Mini (ATmega328 @ 5V 16 MHz), ItsyBitsy 32u4 5V 16MHz, ItsyBitsy 32u4 @ 3.3V 8MHz or ItsyBitsy M0 @ 3V 48MHz. All have built-in USB and are comparable...

Are you ready? Really ready? Cause here comes the Adafruit Grand Central featuring the Microchip ATSAMD51 . This dev board is so big, it's not named after a Metro train, it's a whole freakin' station ! This board is like a freight train, with its 120MHz Cortex M4 with floating point support. Your code will zig and zag and zoom, and with a bunch of extra peripherals for support, this will for sure be your favorite new chipset. The...

Heard about Arduino IDE-compatibles but not sure how to start? The Adafruit Metro is an ATmega328-based (like a lot of our own products) development board. Since it is shaped the same, and code/shield-compatible with the Arduino UNO R3 design, our Adafruit Metro is easy to use and hacker friendly and this is the perfect beginner kit for learning how to use the Adafruit Metro!  This bundle is designed to get you started quickly and...

Just about all electronics use a UART serial port with RX and TX pins for debugging, bootloading, programming, serial output, etc. But it's rare for a computer to have a serial port anymore. Thus, a serial cable is an essential part of any electrical engineer's toolkit. This is a USB C to TTL serial cable with an FTDI FT232R  usb/serial chip embedded in the head. It has a 6-pin socket at the end with 5V power and ground, as...

Never hack without a helmet, now you can protect your cute little Adafruit Metro Mini with this chic new  Zebra Byte Case ! This laser-cut DIY plastic enclosure is designed to perfectly frame your tiny microcontroller and firmly lock it in with high quality stainless steel screws at each corner. While this case leaves absolutely no wiggle room, there are still a few cleverly placed air vents...

Just about all electronics use a UART serial port with RX and TX pins for debugging, bootloading, programming, serial output, etc. But it's rare for a computer to have a serial port anymore. Thus, a serial cable is an essential part of any electrical engineer's toolkit. This is a USB C to TTL serial cable with an FTDI FT232R  usb/serial chip embedded in the head. It has a 6-pin socket at the end with 5V power and ground, and...

The new and improved Programmer Shield is essentially a USB-JTAG converter that gives advanced users complete access to the Photon's memory space. It supports openOCD and the WICED SDK, and is built around the FT2232H high speed USB FIFO. Unlike the previous Programmer Shield, it is fully standalone and requires no third-party programmers. In addition to providing a JTAG interface, this shield can also act as a USB to Serial converter....

The Cloud from Seeeduino is a microcontroller based around the Dragino WiFi IoT module HE and the classic ATmega32u4.  This board is Arduino compatible with built-in ethernet and WiFi support.  There's also a USB-A port that makes it good for designing prototypes that need network connection.   You can use this as a compatible board the now-discontinued Arduino Yun. The HE - which means "core" in Chinese - is a...

We're big fans of the Intel® Edison Compute Module but the connector's not generic like everyday header, and can be a bit difficult to find.  No longer! This 70-pin receptacle header for the Intel Edison connects to the Edison Compute Module and allows breakout boards to be added more easily. If you're in the Edison block business, this is for you It's a tiny 70-pin connector that's main...

If you've ever struggled to use a solderless breadboard with an Arduino, you understand how frustrating it can be! This clone acts just like an Arduino, and works with the latest Arduino software. For many projects it can even be preferable! The kit includes all parts necessary, the assembly is straightforward and well documented. Since this design doesn't include a USB chip, you'll want an FTDI USB 232-TTL cable or FTDI friend....

The  Intel® Edison R2 Kit for Arduino is a compact computing platform that's small by design so you can easily integrate it into projects.  It's primarily designed for "Internet of Things" projects and is pretty powerful for its small size.  The Edison has a bunch of features that makes it appealing for makers of all skill levels.  It uses a 22 nm Intel SoC that includes a dual core, dual...

Introducing the MENTA, a portable minty Arduino-compatible project that fits into a common mint tin. We took our super popular Boarduino series, and wrapped it with a prototyping area into a rounded PCB that slots directly into an Altoids-sized metal tin. We included everything you expect to jump-start your project: DC power adapter jack with polarity protectionBeefy 1 Amp 5V regulator and 250mA 3.3V regulator for 3.3V devicesGreen power LED,...

Galileo 2 is a microcontroller board based on the Intel® Quark SoC X1000 Application Processor, a 32-bit Intel Pentium-class system on a chip (datasheet). It’s the second generation of the board which is based on Intel® architecture designed to be hardware and software pin-compatible with Arduino shields designed for the Uno R3. This is the Generation 2 version of the Intel® Galileo Development Board. Whats new with...

The Intel® Edison is a compact computing platform that's small by design so you can easily integrate it into projects.  It's primarily designed for "Internet of Things" projects and is pretty powerful for its small size.  The Edison has a bunch of features that makes it appealing for makers of all skill levels.  It uses a 22 nm Intel SoC that includes a dual core, dual threaded Intel Atom...

Would you like to add powerful and easy-to-use Bluetooth Low Energy to your robot, art or other electronics project? Heck yeah! With BLE now included in modern smart phones and tablets, its fun to add wireless connectivity. So what you really need is the new Adafruit Bluefruit LE Micro - it's an Atmega32u4 chip (same as used as in the Adafruit Flora or Arduino Leonardo) plus our SPI Bluefruit LE Friend in one. Bluetooth...

Note: These use genuine FTDI chips, either we purchase them or they are manufactured to our specifications with the requirement of genuine FTDI chips 10/22/14 - read more. If you've ever struggled to use a solderless breadboard with an Arduino, you understand how frustrating it can be! This development board acts just like an Arduino, and works with the latest Arduino software. For many projects it can even be preferable! The kit includes...

Galileo is a microcontroller board based on the Intel® Quark SoC X1000 Application Processor, a 32-bit Intel Pentium-class system on a chip (datasheet). It’s the first board based on Intel® architecture designed to be hardware and software pin-compatible with Arduino shields designed for the Uno R3. Digital pins 0 to 13 (and the adjacent AREF and GND pins), Analog inputs 0 to 5, the power header, ICSP header, and the UART port pins...

The Arduino 101 is simple. It's a board that combines the universal appeal of Arduino with the latest technologies - like the Intel Curie module, Bluetooth LE capabilities, and a 6-axis accelerometer/gyro. The Arduino 101 contains two tiny cores, an x86(Quark), and a 32-bit ARC architecture core, both clocked at 32MHz. The board also comes with 14 digital input/output pins (4 can be used as PWM outputs), 6 analog inputs, a USB...

What do you get when you combine an Adafruit classic with geniuses at Arduino? The Arduino GEMMA! It's a tiny wearable platform board with a lot of might in a 1" diameter package. Powered by a Attiny85 and programmable with an Arduino IDE over USB, you'll be able to realize any wearable project. This is a collaboration with Arduino.cc and Adafruit.  This product is for US Sales only! Use Arduino IDE 1.6.4 or higher...

We sure love the ATmega328 here at Adafruit, and we use them a lot for our own projects. The processor has plenty of GPIO, Analog inputs, hardware UART SPI and I2C, timers and PWM galore - just enough for most simple projects. When we need to go small, we use a Metro Mini, but when size isn't as much of a concern, and a USB-serial converter is required, we reach for an Adafruit METRO . METRO is the culmination of years of playing with AVRs:...

The Particle Shield Shield converts the footprint and pins of your Photon into that of an Arduino, allowing for use of existing Arduino shields and accessories. This shield converts the pin mapping of the Photon to the Arduino pin layout and provides a voltage translation of 3.3V to/from 5V. Note that Arduino libraries are not necessarily going to work without some porting, but for many basic shields that do not depend on the specific Arduino...

Regulate the power to a variety of electronics with this four Relay Shield for Photon ! The Relay Shield allows you to control any normal outlet or high voltage product from anywhere. The shield comes with four relays that are rated at a max of 220V @10Amp allowing you to control any electric appliance rated at under 2000 Watts. Note that you *will* need a DC adapter to power the relays! We recommend this one.

We're no longer selling this pack of Trinket 3V+5V, we recommend our Trinket M0 which has better USB support, way faster processor, a ton more memory and CircuitPython support!   Be the life of your (hackerspace) party when you show up with this six-pack! Get 6 Trinkets at 12% off - comes with 3 x 3V Trinkets, and 3 x 5V Trinkets.   As of October 12th, 2015 the 6-pack now includes three revised 3V Trinkets and three revised 5V...

The Intel® Edison is a compact computing platform that's small by design so you can easily integrate it into projects.  It's primarily designed for "Internet of Things" projects and is pretty powerful for its small size.  The Edison has a bunch of features that makes it appealing for makers of all skill levels.  It uses a 22 nm Intel SoC that includes a dual core, dual threaded Intel Atom CPU...

The Particle Power Shield is the best way to—you guessed it—provide power to your mobile Particle projects. Based around the MCP73871 battery management controller, this shield allows you to simultaneously power a Photon and charge a connected Li-Ion or Li-Po battery. You'll also be able to monitor battery levels using the Photon itself, which makes the Power Shield the best way to untether your wireless project. Besides the...

We're no longer selling this pack of Pro Trinket 3V+5V, we recommend our Metro Mini (5V 328P with USB-Serial Converter), Feather 328P (3.3V 328P with USB-Serial and LiPo charger), ItsyBitsy 32u4 (Available in both 3.3V and 5V) and the ItsyBitsy M0. The Metro Mini and Feather 328p both use the same ATmega328P chip, but come with a real USB-serial converter chip. The ItsyBitsy boards have 'native' USB and are almost the same size. None...