The Adafruit SMT Breakout PCBs for 32-pin QFN or TQFP solve the problem that not all chips are available in breadboard friendly packages. With QFN pinouts on one side and TQFP pinouts on the other the boards also have space for 0.1in. pitch headers. Soldering the chip onto the correct side will require a decent soldering iron and a steady hand or a friend with a reflow oven. If you go down the soldering iron route, Adafruit have produced a guide to ease your route to SMT prototyping.

• QFN on one side, TQFP on the other
• Space for 0.1in. pitch headers (not supplied)
• For 32-pin devices
• Supplied in packs of 3
• Adafruit part no.: 1163

*Customers looking to resell on eBay or Amazon should contact Adafruit directly.

The Adafruit 16-pin SOIC or TSSOP Surface Mount Breakout PCBs solve the problem that not all chips are available in breadboard friendly packages. With TSSOP pinouts on one side and SOIC pinouts on the other the boards also have space for 0.1in. pitch headers. Soldering the chip onto the correct side will require a decent soldering iron and a steady hand or a friend with a reflow oven. If you go down the soldering iron route, Adafruit have produced a guide to ease your route to SMT prototyping.

• SOIC or (T)SSOP on each side of the board
• Space for 0.1in. pitch headers
• For 16-pin devices
• Supplied in packs of 3
• Adafruit part no.: 1211

*Customers looking to resell on eBay or Amazon should contact Adafruit directly.

The Adafruit SMT Breakout PCB Set will change the way you think about surface mount components. There's no more hunting for a DIL or breadboard friendly version of the latest chip, if it has 6-pins or less then it's likely to fit one of these boards. You get 3 x different boards which will accommodate 5 x packages by having solder pads on both sides of the boards, including SOT-23, SOT-89, SOT-223, TO-252. Please see the technical specification for details.

Granted that soldering SMD components isn't the easiest thing but Adafruit have a free tutorial to help you conquer the world of tiny packages.

• Mount 5 different package types
• 3 different board types
• Supplied in a pack of 13 mixed boards
• Adafruit part no.: 1230

*Customers looking to resell on eBay or Amazon should contact Adafruit directly.

The Adafruit USB Micro-B breakout board is for those projects that must have micro-USB, but sometimes they're just too tricky to solder or perhaps you aren't at the PCB stage yet. Most small devices have adopted the micro-USB as the go to connector which is a great relief as we all have the cables to hand. These sockets are fully soldered for strength and reliability and let you talk to your USB enabled microcontroller or simply provide 5V DC.

Supplied fully assembled with a 1 x 5-pin strip of 0.1in. male header pins.

• Micro-USB to breadboard or wire connections
• All signal (x5) brought out to breadboard friendly solder pads
• Dimensions 10 x 20 x 4mm (0.4 x 0.8 x 0.2in.)
• Adafruit part no. 1833

*Customers looking to resell on eBay or Amazon should contact Adafruit directly.

The Adafruit I2C Non-Volatile 256Kbit / 32KByte FRAM breakout gives your next project fast, persistent storage using cool new ferroelectric RAM technology. It's low-power, has a fast write speed, and each location can be written to 10 trillion times. Once written, data will be kept safe for 95 years at room temperature, though there may not be Arduinos then. The I2C interface runs at 1MHz and the board is happy with 3 to 5V power and logic.

Supplied as a fully assembled board plus a 1 x 8-pin 0.1in. pitch male header strip for you to solder in as required.

• 256 Kbits (32 Kbytes) of storage
• 2-wire I2C interface
• 3 to 5V power and logic compatible
• Adafruit part no. 1895

*Customers looking to resell on eBay or Amazon should contact Adafruit directly.

The Adafruit FT232H USB breakout board is the Swiss army knife for serial communications, with access to SPI, I2C, serial UART, JTAG and others. This means your laptop or PC can talk directly to displays, sensors and other devices you would normally interface to through an Arduino, Raspberry Pi or similar gadget. You can also program it to have 12 x GPIO lines opening more possibilities. When you add all this to the Adafruit Python GPIO library you have a fantastic development and debugging tool. When you're using a device for the first time, this clever little board could save your sanity, test and debug your code on a PC or laptop then plug the working code into your microcontroller. The board is programmed as a USB to serial UART link by default but it can also be placed into MPSSE (Multi Protocol Synchronous Serial Engine) mode giving you access to all the other serial communications protocols. Adafruit supply a tutorial and their Python library which is free to download.

Supplied as a fully assembled board with 2 x 10-pin 0.1in. pitch male header strips for you to solder on as required.

• Talks to SPI, I2C, serial UART, JTAG and others
• In MPSSE mode has 12 GPIOs available
• Micro-USB interface to host computer
• Python, C and C++ libraries available to download
• 3.3 and 5V serial Tx/Rx compatible for Arduino and Raspberry Pi, for example.
• 23 x 38 x 4mm (0.9 x 1.5 x 0.2in.)
• Weight: 3.4g
• Adafruit part no. 2264

*Customers looking to resell on eBay or Amazon should contact Adafruit directly.

The Adafruit MicroSD card breakout board will let your next project store up to 2Gbytes of data using just 4 x pins on your microcontroller. Its onboard 5V to 3V regulator means it can supply up to 150mA to demanding SD cards. The board is 3 or 5V compatible and the level shifting has been done with a chip which makes it more reliable and allows faster read/write access. Adafruit have a free tutorial on all things micro-SD.

Supplied as a fully assembled board plus a 1 x 8-pin 0.1in. pitch male header strip for you to solder in as required.

• Supports FAT and FAT32 cards up to 2Gbytes
• Level shifter for 3 to 5V compatibility
• Uses 3 or 4 digital IO lines
• Dimensions 31.85 x 25.4 x 3.75mm (1.25 x 1.00 x 0.15in.)
• Adafruit part no. 254

*Customers looking to resell on eBay or Amazon should contact Adafruit directly.

The Adafruit DS3231 Precision RTC Real Time Clock Breakout boards are cleverly designed to compensate for thermal drift making them some of the most accurate RTCs available in a small package. The timing crystal is inside the chip and there's a temperature sensor right next to it so that clock ticks can be added and removed to maintain accuracy. A simple CR1220 coin cell can keep the clock ticking for years; the battery isn't supplied, but we have plenty to choose from.

Adafruit provide a detailed tutorial to get you started covering the pinout, soldering the header strip and using a library to talk to the clock.

Supplied as a fully assembled board plus a strip of 0.1in. header for you to solder on as required.

• One of the most accurate RTCs in a small package
• Communicates using I2C, only 2 x GPIOs
• Dimensions 23 x 17.6 x 7.2mm (0.9 x 0.7 x 0.28in.)
• Adafruit part no.: 3013

*Customers looking to resell on eBay or Amazon should contact Adafruit directly.

The Adafruit Perma-Proto Half Size help you make the difficult transition from a breadboard project to a PCB and solder gadget. They are laid out with the same hole pattern and markings as a breadboard so you can make a direct copy of your working prototype. Each long edge has two power lines and the centre strips have 5 x pads just like a classic breadboard. The traces between pads can be cut if you need to isolate parts of the board or divide up the power lines. All the holes are plated through for strength so they won't peel off with rework and the pads are gold plated so there's none of the oxidation you normally get with stripboard. Last but not least these proto-boards have 3 x mounting holes to secure them to your project box.

• 30 x rows with 2 x sets of 5 pads per row (300 pads)
• 4 x power rails
• Dimensions 81 x 56mm (3.2 x 2.2in.)
• Supplied in a pack of 3
• Adafruit part no.: 571

*Customers looking to resell on eBay or Amazon should contact Adafruit directly.

This Adafruit Massive Arcade Button with LED has a 100mm diameter arcade button with a 10mm deep plastic base. It ready for all sorts of pressing and pushing. Science has shown no one can resist pressing its shiny surface and saying "beep!".

We've seen these on some games of skill in arcades, they're easy to mount on nearly any kind of enclosure. They're not waterproof or weatherproof, so best used indoors. This button has a domed red plastic cover with a black retaining ring around it. There's an optional LED included that will light up the button. The LED has a built in resistor so you can run it up to 12V but given the massive size and shallow depth of the button, it doesn't illuminate the entire button face evenly. The button activates a common arcade microswitch (included), the switch contacts are normally open. When the button is pressed, the contacts close.

• 100mm diameter button 10mm deep plastic base
• Indoor use
• Optional LED included
• Built in LED resistor
• Micro switch terminals are 0.187" wide
• LED connection terminals are 0.25" wide

*Customers looking to resell on eBay or Amazon should contact Adafruit directly.

This Adafruit MCP9808 Precision I2C digital temperature sensor is very accurate and precise. With a typical accuracy of ±0.25°C over the sensor's -40°C to +125°C range and precision of +0.0625°C. The Adafruit MCP9808 Precision I2C digital temperature sensor works great with any microcontroller using standard i2c.

There are 3 address pins so you can connect up to 8 to a single I2C bus without address collisions. Best of all, a wide voltage range makes is usable with 2.7V to 5.5V logic.

Unlike the DS18B20, this sensor does not come in through-hole package; so this small sensor is placed on a breakout board PCB for easy use. The PCB includes, mounting holes and pull down resistors for the 3 address pins. There is a library for Arduino that will work with any Arduino compatible. It will be up and running in 15 minutes or less.

• Simple I2C control
• Up to 8 on a single I2C bus with adjustable address pins
• 0.25°C typical precision over -40°C to 125°C range (0.5°C guaranteed max from-20°C to 100°C)
• 0.0625°C resolution
• 2.7V to 5.5V power and logic voltage range
• Operating Current: 200 μA (typical)

*Customers looking to resell on eBay or Amazon should contact Adafruit directly.

12mm Coin Cell Breakout w/ On-Off Switch

This simple but effective breakout board has a CR1220 coin cell battery holder soldered on, an on/off switch and 0.1" pitch breakout pins for easy connecting.

It's great for powering very low-current projects, or adding a battery backup circuit to a real-time-clock or similar. There are two ground pins, one 'switched' power pin, and one pin that is always on.

It comes with one fully assembled and tested breakout plus a small stick of 0.1" header, so you can solder it on and plug into a breadboard.

Also available without a switch.

25mm x 23mm x 1.5mm / 1" x 0.9" x 0.06"Mounting hole distance: 18mm x 16mm / 0.7" x 0.6"Weight: 2g

• Simple but effective On-Off Switch

*Customers looking to resell on eBay or Amazon should contact Adafruit directly.

With the Adafruit MiCS-5524 Gas Sensor Breakout you can give your next sensor project a nose for gasses. From SGX Sensortech, this breakout makes it easy to use. The MiCS-5524 is a robust MEMS sensor for indoor carbon monoxide and natural gas leakage detection, it's suitable also for indoor air quality monitoring; breath checker and early fire detection.

Please note: This sensor is sensitive to CO ( ~ 1 to 1000 ppm)Ammonia (~ 1 to 500 ppm)Ethanol (~ 10 to 500 ppm) H2 (~ 1 - 1000 ppm)Methane / Propane / Iso-Butane (~ 1,000++ ppm)

However, it can't tell you which gas it has detected.

This breakout board is not for any safety, medical or finished product usage. We're selling it for hobby education & experimentation and won't guarantee it for any other purpose. All gas sensors require calibration for precision output. Using it is easy: Power it with 5 VDC and read the analog voltage off of the output pin. When gasses are detected, the analog voltage will increase in proportion of detected gas. When powered, the heater draws about 25-35mA. You can use the EN pin to power it off (pull it high to 5V to turn off) to conserve energy. Just make sure to wait a second after turning the heater on to make sure its all heated before taking readings.

• Each order comes with one assembled and tested MiCS-5524 breakout and a small amount of header.
• Light soldering needed to attach the header on - or you can use just plain wires.
• Wiring the sensor is very simple.
• Power it from 5V and Ground. Then listen on the analog output pin with analogRead(A0)

*Customers looking to resell on eBay or Amazon should contact Adafruit directly.

Adafruit seesaw is a near-universal converter framework which allows you to add and extend hardware support to any I2C-capable microcontroller or microcomputer. Instead of getting separate I2C GPIO expanders, ADCs, PWM drivers, etc, seesaw can be configured to give a wide range of capabilities.

For example, Adafruits ATSAMD09 breakout with seesaw gives you3 x 12-bit ADC inputs 3 x 8-bit PWM outputs 7 x GPIO with selectable pullup or pulldown1 x NeoPixel output (up to 63 pixels)1 x EEPROM with 64 byte of NVM memory (handy for storing small access tokens or MAC addresses)1 x Interrupt output that can be triggered by any of the accessories2 x I2C address selection pins1 x Activity LED

But you can reprogram and reconfigure the chip to have more or less of each peripheral - as long as it fits into the ATSAMD09D14's firmware.There is a UART converter but it isn't included in the default firmware.

• The ATSAMD09 breakout is great for development of seesaw capabilities.
• You can use it to give your Raspberry Pi or ESP8266 more hardware support.
• Each breakout comes with the assembled and tested board, as well as some header strips.

*Customers looking to resell on eBay or Amazon should contact Adafruit directly.