Raspberry Pi 4/3B Relay HAT

Relays are very important switching components that we use pretty often.

Components details:

Relays:

Mfr. Part #SRD-05VDC-SL-C

• 5VDC SPDT -
• General Purpose
• Non Latching
• Through Hole Relays
• ROHS Compliant
• (250VAC) Max Switching Voltage

Screw terminals:

Manufacturer: METZ CONNECT GmbH

Mfr. Part #31001102

• Type: Through Hole
• Number of Positions: 2
• Type: Wiring Board - Line to Board
• Pitch0.197"(5.00mm)

Mosfets:

As the GPIO current of Raspberry Pi is quite low, It is a good practice to use MOSFETs for switching through 5V bus. So

Manufacturer: MDD（Microdiode Electronics）

Mfr. Part # MMBT5551

• 160V
• 0.3W
• NPN
• 0.6A
• SOT-23-3
• Bipolar Transistors - BJT
• ROHS Compliant

Getting Started:

Raspberry Pi 4

" Your tiny, dual-display, desktop computer

…and robot brains, smart home hub, media centre, networked AI core, factory controller, and much more"

To Setup Your Raspberry Pi for the First time, Check this link below

Setting up your Raspberry Pi - Introduction | Raspberry Pi Projects

https://projects.raspberrypi.org/

GPIO pins allow adding extensions to your Raspberry Pi, whether with HATs or to create circuits. The easiest way to use them is to create Python scripts, but Scratch or other software are good options to consider.

To Configure GPIO:

Step 1. Download and install OAS onto Raspberry Pi 4 device. View the Raspberry Pi Installation guide for an easy to...

Step 2. Setup access to gpiomem for the user account the OASEngine is running under. The default is oasuser.

Step 3. From a Windows system start Configure OAS application from the program group Open Automation Software.

(Helpful Links: Getting Started Raspberry Pi GPIO | Industrial Internet of Things Data Platform | (openautomationsoftware.com) )

For PINOUT description:

https://raspberrytips.com/wp-content/uploads/2019/04/raspberry-pi-pinout.png?ezimgfmt=ng:webp/ngcb45

Dimensions & PCB Info:

Size:64.99mm x 56.01mm

Signal Layers:2

None Signal Layers:10

Length of Tracks:121.5mm

Copper Areas:2

Open Source Design:

This is an Open Source design with all the files and documentation available to General Public Under GNU V3.0 License. You can modify and recreate this design.

Source Files on Github...