Raspberry Pi HATs

T-Cobbler Protoboard Extension Plate GPIO 40 Raspberry PI B+ Pin features:
- Shield expansion module for Raspberry Pi 2 and Pi 3, B and B +
- Dimension: 6 x 7.3x 1.9mm

T-Cobbler GPIO KIT + 40-pin Grey Flat Cable Pi B+ RPI 2 RPI 3 RPI Zero features:
- Shield to connect with breadboard
- Dimension: 6 x 7.3x 1.9mm
- Flat cable female / female 40 pins
- Total length: 25cm
- Quantity:
1x shield
1x flat cable

DS3231 Precision RTC Real Time Clock Module AVR ARM features:
- Can be used in projects of Arduino, Raspberry Pi, PIC, AVR
- Function compatible with the DS 3231
- Power supply voltage: +2.3 V to +5.5 V
- Temperature range: -40 ° C to + 85 ° C
- Low energy consumption
- Full clock calendar functions that include seconds, minutes, hours, date, month and year and valid until leap year compensation
- Two alarm calendar
- Interface: I2C

2 Channel Relay Module 5V 10A for Arduino features:
- 5V relay module with 2 optocoupled channels
- This module can be controlled directly by the microcontroller (Arduino, 8051, AVR, PIC, DSP, ARM, ARM, MSP430, TTL)
- Channels: 2 (independent protected with Optocouplers)
- Supply voltage: 5V
- Output Current: 10A
- Relay activation current: 15mA ~ 20mA
- Insulation: Yes
- LED indicator: For each channel
- Dimensions: 40x 50mm

Edup Mini Dongle WiFi USB For pcDuino 3 Nano Raspberry Pi features:
- Interface type: USB
- Supports IEEE 802.11e draft 802.11n
- Supports USB 2.0, compatible with USB 1.1 and 1.2
- Support systems:
- Win2k / XP / Vista / Win7 / Win8.1 / Win10 / Mac / Linux
- Operating distance: 91 meters indoors, 275 meters in open space
- Transfer rate: 150Mbps (downlink) and 150Mbps (uplink)
- Works with old Wireless-G and Wireless-B networks
- WEP and WPA encryption - 64-bit / 128-bit WEP (Wired Equivalent Privacy), TKIP, AES 2,400GHz ISM
- Frequency range: 2.4 to 2.4835 GHz
- Operating channels: 13 - Support network protocol: CSMA / CA with acknowledgment
- Transmission mode: DSSS

This module is used to extend the Raspberry's 40 GPIO pins to another set of 2x20 male pins and 8 parallel pins accessible on the terminal blocks in the that test leads are pushed. The electronic board offers great reliability with the Raspberry and is very easy to connect thanks to its existing suitable accessories but not included.
The module offers a set of mini jumpers to configure the GPIO.

Pimoroni Fan is the best you can do for your new Raspberry 4! It is a well known fact, Raspberries can get hot. Even though, there are plenty of solutions to that, you will find no better than this Pimoroni Fan. It is a no-solder device, hence you can put it on and off as you wish

Sense HAT is your absolute classic used for a well-known and popular Astro Pi projects. It features set of sensors (Pressure, humidity, IMU and temperature) and a great 8x8 LED screen. It is a full set for your Raspberry - you can both measure your projects environment, display it on the screen as well as manouver and input data with joystick and buttons included on the HAT.

Ever needed a microphone for your project. This tiny little board will fulfill all your needs - it is not only mobile, but as well easy to connect. A low power, efficient, omnidirectional AMP401 microphone has an analog output. It works great for near and long range uses and is particularly suitable for a mobile projects given its extremely low energy consumption. You can use it in a range of applications - we can see it used in smartphones, cameras or electronic nannies.

This tiny little board features two chips from Maxim Integrated: MAX32664 and MAX30101. The 30101 Oximetry module  is the sensor on board responding for both oximetry and heart rate sesnsing. The MAX32664 is equipped with a Cortex M4 handling algorithimc calculations, digital filtering and automatic gain control. The board comes with I2C and SparkFun has provided to it Qwiic connectors for ease of use.