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RPi Zero GPIO extensions and HAT

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RTC module DS3231 I2C - real time clock

Module with real time clock, allows you to read the time in hours, minutes, and seconds, and to read the date: month, day, year. The device was based on the DS3231 system,...
4.9 (15)
Index: MOD-03790
Index: MOD-03790
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Raspberry Pi PoE+ HAT - Power over Ethernet for Raspberry Pi 4B/3B+ - SC0468

Cap designed for Raspberry Pi 3B+ and 4B versions which are equipped with 4-pin PoE connector. It allows simultaneous communication with LAN and powering the minicomputer...
4.7 (14)
Index: RPI-19537
Index: RPI-19537
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Raspberry PI 4/3/B+/2 GPIO Expansion Board E1 - blue

The board provides the connection of the three modules to each of the GPIO pins of the Raspberry Pi. It has 3 rows of goldpin connectors, 40 pieces in each.
4.8 (6)
Index: MOD-07149
Index: MOD-07149
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Regular price €5.90 Price €5.90

Logic level bi-directional converter, 4-channel - SparkFun BOB-12009

The module allows to exchange data between systems that use the most popular voltages levels: 5 V and 3.3 V and 1.8 V and 2.8 V. Works in both directions simultaneously. It has...
4.9 (10)
Index: SPF-02259
Index: SPF-02259
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Regular price €3.90 Price €3.90

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 (3)
Index: UCC-02556
Index: UCC-02556
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Regular price €2.90 Price €2.90

ReSpeaker Mic Array v2.0

ReSpeaker Mic Array v2.0 by Seeed is another more extended version of ReSpeaker Mic Array v1. The board with built-in long-range microphone, capable of detecting voices at a...
Index: SEE-14133
Index: SEE-14133
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Regular price €66.90 Price €66.90

Logic level bi-directional converter, 4-channel - Pololu 2595

Miniature (13 x 10 mm). the module allows to exchange data between systems that use the most popular voltage levels ranging from 1.5 V to 18 V and Vice versa. Four channels to...
4.9 (8)
Index: PLL-02523
Index: PLL-02523
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IQaudIO DAC+ - sound card for Raspberry Pi 4B/3B+/3B

The sound card designed for the Raspberry Pi minicomputer provides high quality Full HD 24-bit/192 kHz audio with built-in hardware volume control via the Linux built-in...
5.0 (17)
Index: RPI-18615
Index: RPI-18615
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TV HAT tuner DVB-T - module with decoder for Raspberry Pi 4B/3B+/3B/Zero

Shield for Raspberry Pi which consists to the tuner of the terrestrial television. It enables the  reception of all available, uncoded channels of digital terrestrial...
4.6 (19)
Index: RPI-13066
Index: RPI-13066
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Regular price €26.50 Price €26.50

4-channel logic level converter

The module allows to exchange data between systems that use the most popular levels of voltage: 5 V <-> 3.3 V and 3.3 V <-> 1,8 V. It works in both directions simulatneously....
4.8 (13)
Index: MSX-06117
Index: MSX-06117
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RS485 CAN HAT - overlay for Raspberry Pi - Waveshare 14882

Shield for Raspberry Pi, version 4B / 3B+ / 3B / 2B / Zero / Zero W with system SN65HVD230  which allows communication between CAN and SPI and the SP3485 system that...
4.9 (7)
Index: WSR-12532
Index: WSR-12532
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Regular price €10.50 Price €10.50

Extension GPIO Raspberry 4B/3B+/3B/2B/B+ to the contact plate + tape + breadboard

This module allows to connect GPIO pins of Raspberry Pi 4B, 3B+, 3B, 2B and B+ versions to the PCB using 40 wires tape. The kit includes GPIO extension module, contact board...
5.0 (3)
Index: OST-14314
Index: OST-14314
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Ethernet / USB (B) HUB - 3xUSB 1xRJ45 Ethernet - frontend Overlay for Raspberry Pi - Waveshare 20416

Overlay for Raspberry Pi, adding three USB ports and one RJ45 Ethernet port. It has an embedded Ethernet RTL8152B chip. The pogo pin layout allows the overlay to connect...
4.8 (8)
Index: WSR-20080
Index: WSR-20080
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Regular price €12.00 Price €12.00

MSX RTC DS1307 I2C - real time clock

Module with real time clock and backup battery (battery included). It allows you to read the time in hours, minutes, and seconds, date: month, day, year. The communication...
5.0 (3)
Index: MOD-02717
Index: MOD-02717
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Raspberry Pi DAC Pro - sound card for Raspberry Pi 4B/3B+/3B

The Raspberry Pi DAC Pro is based on the Burr Brown PCM5242 32-bit / 384 kHz converter, allows for Full HD 24-bit / 192 kHz audio playback. The module is equipped with two...
5.0 (14)
Index: RPI-18616
Index: RPI-18616
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Regular price €29.90 Price €29.90

GPIO pin header expander for Raspberry Pi 3/2 / B + with quick couplers - cascade

An expansion board that allows you to easily connect the modules to the GPIO pins on a Raspberry Pi. Board is combined with minicomputer via 40-strip ribbon . It has goldpin...
5.0 (3)
Index: DNG-11800
Index: DNG-11800
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Regular price €9.50 Price €9.50

Extension GPIO Raspberry Pi 3/2/B+ to the contact plate + tape

The module allows connection of the GPIO leads of the minicomputer Raspberry Pi 3, 2 and B + to popular breadboards with 830 and 400 holes, using an attached to the set,...
5.0 (2)
Index: RPI-02892
Index: RPI-02892
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Regular price €4.90 Price €4.90

PCF8591 - A/D and D/A converter, 8-bit I2C v2

Module with A/D converter - 4 channels and D/A - 1 output. It works with voltage from 2.5 V to 6.0 V, and communicates over I2C. The board also contains: potentiometer,...
5.0 (1)
Index: MOD-02632
Index: MOD-02632
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MCP3424 - ADC 18-bit 4-channel I2C converter

Module with analog-digital converter, delta-sigma type with 18-bit precision. It is equipped with four channels with differential inputs. It works at speed of up to 240 samples...
5.0 (4)
Index: DFR-03036
Index: DFR-03036
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Regular price €13.90 Price €13.90

OnOff SHIM - on / off switch - overlay for Raspberry Pi

OnOff SHIM is a shield for the Raspberry Pi, mounted on the GPIO connectors. After disconnecting the power supply to the micro USB port on the shield, you can turn on and off...
4.5 (5)
Index: PIM-10633
Index: PIM-10633
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E-paper of 2.13" 250x122px display (no module) for overlays for the Raspberry Pi - Waveshare 12672

The display of type of e-paper with a diagonal of 2.13 " and a resolution of 250 x 122 px. It is designed to use with shield for Raspberry Pi. It communicates via the SPI...
5.0 (2)
Index: WSR-09102
Index: WSR-09102
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Regular price €8.00 Price €8.00

Proto Board for Raspberry Pi Zero

Board allows independent creation of electronic circuits. Connected directly to the GPIO pins of the Raspberry Pi minicomputer in a version Zero.
5.0 (4)
Index: MSX-05794
Index: MSX-05794
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L76X Multi-GNSS HAT - GPS/BDS/QZSS for Raspberry Pi 4B/3B+/3B/2B/Zero - Waveshare 16193

The GNSS overlay for Raspberry Pi and Jetson Nano minicomputers supports Multi-GNSS systems: GPS, BDS and QZSS. The main advantages of the module are fast positioning, high...
5.0 (1)
Index: WSR-14783
Index: WSR-14783
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Regular price €27.90 Price €25.11
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HiFiBerry Amp2 amplifier of class D 60 W for Raspberry Pi 4B/3B+/3B/2/B+/A+

Cap type Hat for Raspberry version 4B, 3B+, 3B, 2B, A+, B with a built-in class D amplifier with power of 60 W. The device supports speakers with an impedance of 4 Ω to 8 Ω,...
5.0 (4)
Index: RHF-09886
Index: RHF-09886
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Regular price €66.90 Price €66.90

What are HAT overlays, and what is their purpose?

HAT overlays are rectangular boards with dimensions of 65mm x 56mm. They are distinguished by rounded corners, as well as holes for fixing them to the case. In addition, the HAT overlay has a 40-pin GPIO connector that is compatible with Raspberry Pi. Automatic system configuration is possible with ID_SD and ID_SC pins. They connect via the I2C interface to the EEPROM memory, which contains configuration software on all GPIO pins, but also Device Tree files. These files are necessary for automatic software installation via Linux because they contain a description of a HAT board.

Our shop offers HAT overlays in different variants, which allows us to match them to a specific version of Raspberry Pi, both the latest and older ones, which are still used by many users. This way, you can be sure that the overlay is compatible with the device, and thus the whole thing will work smoothly and safely.

What should you know about the GPIO extension?

GPIO, which is actually General Purpose Input Output, is the basic parameter of Raspberry Pi. Digital GPO pins have two statuses, i.e. ON and OFF, sometimes also have a receiving direction. If we know and use the appropriate programming language, such as JavaScript or Python, we can control their direction and status. GPIOs are designed to operate at a voltage of 3.3 V, and the maximum current load is 16 mA. So we can power up to two LEDs from a single pin. However, we will need external components in this case, which already uses more power.

GPIO connects Raspberry Pi with Hat overlays. The 40-pin connector allows you to connect external devices, with it you can transmit the output signals needed to control external processes. It is also needed to receive input signals. GPIO extensions, which take the form of HAT overlays, allow you to use Raspberry Pi in many areas of your life. They give you the opportunity to create a LED lighting controller, which is today considered not only the most energy-efficient light source but also the smartest, of course, if we connect it with the controllers. HAT overlays also support the creation of meteorological stations with sensors of temperature, precipitation, wind speed and other weather parameters. We will also use GPIO extensions in designing, among others, drivers for electric gate motor. GPIO extension has also found its application in monitoring and irrigation systems. This means that Raspberry Pi is perfectly suited for modern smart construction. All this thanks to HAT overlays and GPIO extensions.

Create a sound system in your car, a home monitoring system, a weather station or simply improve your everyday comfort with smart lighting. Check our offer of HAT overlays!