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Expanders / extension modules

Products: 28
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MCP23S08-E/P - GPIO expander SPI 8-channel

The chip allows to increase the number of pins (up to 8) of a microcontroller (including Raspberry Pi minicomputer). It communicates with the CPU via the SPI bus.
Index: UCC-04589
Index: UCC-04589
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Regular price €2.50 Price €2.50

PCF8574N - GPIO expander board for microcontroller

The system allows to increase the number of IOs (up to 8) of a microcontroller (e.g. Arduino module). Communicates with the central unit via the I2C bus (TWI).
5.0 (3)
Index: UCC-01210
Index: UCC-01210
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Regular price €2.50 Price €2.50

Module PCF8574 - GPIO expander board for microcontroller - Waveshare 3708

The module allows you to increase the number of GPIOs (up to 8 more) of a microcontroller (e.g. Arduino module). Communicates on the I2C bus (TWI).
5.0 (5)
Index: WSR-04455
Index: WSR-04455
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Regular price €2.90 Price €2.90

Lead expander - 4-channel - with I2C multiplexer - PCA9546 - Adafruit 5663

A multiplexer manufactured by Adafruit and equipped with the PCA9546 chip, which is a replacement for the popular TCA9548A chip. The module allows you to connect up to 4...
Index: ADA-22544
Index: ADA-22544
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Regular price €5.50 Price €5.50

PCF8574 - GPIO expander I2C 8-bit

The system allows to increase the number of devices connected to the I2C bus with 8 pieces. The system has 16 pins.
5.0 (2)
Index: UCC-04921
Index: UCC-04921
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Regular price €3.90 Price €3.90

IO expander - 4 channel - with I2C multiplexer - PCA9546 - STEMMA QT / Qwiic - Adafruit 5664

Module with a multiplexer manufactured by Adafruit and equipped with the PCA9546 chip, which is a replacement for the popular TCA9548A chip. The module allows you to connect...
5.0 (1)
Index: ADA-22545
Index: ADA-22545
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Regular price €5.50 Price €5.50

MCP23017 - I2C 16-channel output expander

The system allows to increase the number of pins (up to 16 ) of the microcontroller (including minicomputer of Raspberry Pi). It communicates with the central unit via the I2C...
5.0 (1)
Index: UCC-02556
Index: UCC-02556
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Regular price €2.90 Price €2.90

MCP23018-E/SP - 16-Bit I/O Expander with Open-Drain Outputs

The system allows to increase the number of pins (up to 16) of the microcontroller (including minicomputer Raspberry Pi). It communicates with the central unit via the I2C bus...
4.9 (5)
Index: UCC-06506
Index: UCC-06506
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Regular price €2.90 Price €2.90

Hot-Swap I2C Buffer - I2C bus buffer module - TCA4307 - Adafruit 5159

Hot-Swap I2C Buffer manufactured by Adafruit is an I2C bus buffer module based on TCA4307 chip. It allows connecting I2C devices while power supply is active, without fear...
5.0 (2)
Index: ADA-20178
Index: ADA-20178
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Regular price €6.90 Price €6.90

Gravity - I2C - 2x UART converter - DFRobot DFR0627

A module that allows to derive two UART interfaces from the I2C interface. The maximum transmission speed is 1 Mb/s , each UART interface has an independent FIFO buffer...
Index: DFR-17311
Index: DFR-17311
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Regular price €9.50 Price €9.50

PCF8575 - GPIO pin expander - I2C - STEMMA QT / Qwiic - Adafruit 5611

Adafruit pin expander equipped with PCF8575 chip. It has as many as 16 pins of GPIO inputs / outputs , thanks to which it increases the design possibilities of the modules...
5.0 (1)
Index: ADA-22192
Index: ADA-22192
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Regular price €8.50 Price €8.50

GPIO expander and Keypad Matrix controller - for matrix keypads - TCA8418 - STEMMA QT / Qwiic - Adafruit 4918

The Adafruit module is equipped with the TCA8418 chip working as a matrix keyboard controller. The chip has a total of 18 I / O pins in a 10 column and 8 row arrangement...
5.0 (4)
Index: ADA-21996
Index: ADA-21996
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Regular price €8.50 Price €8.50

Gravity - CH423 I2C 24 Digital IO Expansion Module - DFRobot DFR0979

The CH423 pin expander from DFRobot allows you to expand the system by up to 24 additional digital I/O ports via the I2C interface. Among them, there are 8 GPIOs with...
5.0 (1)
Index: DFR-22275
Index: DFR-22275
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Regular price €5.90 Price €5.90

MCP23008-E/P - 8-channel I2C pin expander

The system allows to increase the number of pins (up to 8) of a microcontroller (including minicomputer Raspberry Pi). It communicates with the central unit via the I2C bus...
4.7 (3)
Index: UCC-06505
Index: UCC-06505
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Regular price €2.50 Price €2.50

Adafruit ATtiny817 seesaw - STEMMA QT / Qwiic - Arduino compatible - Adafruit 5233

Board based on ATtiny817 chip clocked at 20 MHz with 8 kB of flash memory and 512 B of RAM. It is also a seesaw Adafruit module, an I2C converter that allows you to extend...
5.0 (1)
Index: ADA-20369
Index: ADA-20369
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Regular price €6.90 Price €6.90

AW9523B Expansion Board - 16 I/O - I2C - for Arduino and Raspberry Pi - Waveshare 22132

Waveshare pins expander based on the AW9523B chip . It extends the functionality of the Arduino or Raspberry Pi with 16 additional I / O pins . It uses the I2C interface for...
5.0 (1)
Index: WSR-21728
Index: WSR-21728
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Regular price €5.50 Price €5.50

ATSAMD09 Seesaw I2C - extension for Arduino and Raspberry Pi - Adafruit 3657

Seesaw ATSAMD09 is a universal framework transducer which expands the number of pins for microcontrollers or microcomputers with I2C interface. It extends the board with...
Index: ADA-10319
Index: ADA-10319
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Regular price €6.90 Price €6.90

DFRobot Gravity - analog signal isolator

The module prevents the operation interference of the sensors through the insulation of the analog signal and providing an isolated power for sensors. It is supplied with the...
5.0 (2)
Index: DFR-09529
Index: DFR-09529
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Regular price €22.90 Price €22.90

SparkFun Qwiic GPIO - eight-pin GPIO module - SparkFun DEV-17047

An extension to easily add eight GPIO pins to a microcontroller. SparkFun Qwiic GPIO uses I2C bus . It is based on TCA9534 I/O Expander IC from Texas Instruments. Additional...
5.0 (1)
Index: SPF-19303
Index: SPF-19303
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Regular price €7.50 Price €7.50

Lead expander - 8-channel - with I2C multiplexer - PCA9548 - STEMMA QT / Qwiic - Adafruit 5626

Module with a multiplexer equipped with the PCA9548 chip, which is a replacement for the popular TCA9548A chip. It allows you to connect up to 8 separate I2C digital buses...
Index: ADA-22391
Index: ADA-22391
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Regular price €9.90 Price €9.90

Adafruit ATtiny816 Breakout with seesaw - STEMMA QT / Qwiic

ATtiny816 Breakout is a module manufactured by Adafruit, which acts as a pin expander. It is designed to be used with boards that use the I2C bus , such as Arduino and...
Index: ADA-22893
Index: ADA-22893
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Regular price €7.90 Price €6.72
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Mux Shield II GPIO expander for Arduino - SparkFun DEV-11723

Shield for Arduino that allows you to increase the number of pins up to 48 pins that can operate as digital inputs/outputs and analog inputs. Board moves the connectors on its...
Index: SPF-03398
Index: SPF-03398
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Regular price €38.90 Price €38.90

MCP23017 module - GPIO pin expander - 16-channel I2C - STEMMA QT / Qwiic - Adafruit 5346

Lead expander from Adafruit equipped with the MCP23017 chip. It allows you to extend the number of pins of modules such as Arduino or Raspberry Pi by an additional 16 I/O...
5.0 (5)
Index: ADA-21037
Index: ADA-21037
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Regular price €8.50 Price €8.50

PCF8574 - GPIO pin expander - I2C - STEMMA QT / Qwiic - Adafruit 5545

A lead expander by Adafruit equipped with the PCF8574 chip. It has 8 analog I / O GPIO pins , thanks to which it increases the design possibilities of the modules used. It...
Index: ADA-21909
Index: ADA-21909
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Regular price €6.90 Price €6.90

Lead-out expanders

In extension modules category we offer over a dozen different solutions. Our product range includes both small ICs in DIP packages for THT mounting (through-hole assembly) and more complex modules (with soldered ICs). In order to connect a device to a microcontroller, previously prepared sockets are used (for example for I2C interface), pins prepared for goldpin mounting or goldpins.

Solutions ready to use

Our product range includes, among other things, a wide selection of modules that are ready-made solutions. You can choose one of them and use in simple and fast way a pinout expander, expanding in this way possibilities of your microcontroller. We have devices designed specifically for use with Raspberry Pi, Arduino and Banana Pi, but will also work well with other microcontrollers. Among other things, we have expanders that increase the number of leads by 8 or 16 pins (analog or digital, often also bidirectional pins). They can expand the number of I2C, GPIO, PWM leads and many others. Mux Shield II is our proposed pin expander designed for Arduino, which is able to increase the number of leads by up to 48 pins (they can work bi-directionally as digital or as analog inputs).

We also offer small ICs in DIP type housings, designed for through-hole mounting (THT). These devices are the cheapest way to purchase your own expander and expand the capabilities of your microcontroller. If you are creating your own device where size or weight is important, this is a great solution for you. The modules we offer are ready-made projects that use similar devices but are adapted to different tasks. You can design your own board, which will be optimized for your device - just put your other necessary components on it and save space.