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MakerFocus Raspberry Pi Expansion Board 4 Channel Relay Board Module Power Relay Module for Raspberry Pi 4B/3 Model B+/Raspberry Pi 3/2 Model B (No Programming Required/Programmable)

Amazon.com Price: $19.99 (as of 06/15/2021 04:09 PST- Details) & FREE Shipping. Details

This Raspberry Pi Expansion Board Support Raspberry P
The Relay Board gives your Raspberry Pi board the ability to control high voltage/high current devices, and easily makes normal home appliances become intelligent. Can be accessed programmatically or directly by shell. Up to 4 layers can be stacked.
Switch the I2C address of the device through the DIP switch on the circuit board to ensure that the four-layer module gets different addresses, thus avoiding the problem of address duplication.

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Description


Wiki: https://wiki.52pi.com/index.php/DockerPi_4_Channel_Relay_SKU:_EP-0099Product Decription:

4 Channel Relay Hat Board For Raspberry Pi is one of the “docker pi” module.
It has a 4-channel relay, it is the best choice for smart home projects.
This four-channel relay uses high-quality relay modules combined with the most popular microcontroller technology to communicate with the Raspberry Pi.
You can use multiple modules stacked together for use.
You can stack up to four layers.
Switch the I2C address of the device through the DIP switch on the circuit board to ensure that the four-layer module gets different addresses, thus avoiding the problem of address duplication.
The module is very fast, easy to install, and supports multi-language development, making it ideal for smart home projects.

NOTE: The 4pin pin is a backup that supplies power to future products. You can ignore those pins. Please do not connect any device to that pins.

Product Features
Easy to install, Programmable
Control directly(without programming)
Extend the GPIO Pins
4 channel relay
4 Alt I2C Addr Support
Can Stack with other Stack board
Support multi-language programming
Support 3A 250V AC
Support 3A 30V DC
Support address switching by dial switch
Support relay status light prompt
Independent of the mainboard hardware (require I2C support)
Compatible with 24AWG-30AWG wire

Product Advantage:
Independent of the programming language, it only need I2C protocol support
You could use the command control directily instead of programming
Use the raspberry pi to replace the trandition switch
Compatiable with multiple protection board

Package Including:
1 * Channel Relay Hat Board
4 * M2.5×11+6 copper stick
8 * M2.5×5 screws & nuts
1 * Instructions

Make sure this fitsby entering your model number.
This Raspberry Pi Expansion Board Support Raspberry P
The Relay Board gives your Raspberry Pi board the ability to control high voltage/high current devices, and easily makes normal home appliances become intelligent. Can be accessed programmatically or directly by shell. Up to 4 layers can be stacked.
Switch the I2C address of the device through the DIP switch on the circuit board to ensure that the four-layer module gets different addresses, thus avoiding the problem of address duplication.
The 4 Channel Relay uses high-quality relay modules combined with the most popular microcontroller technology to communicate with the Raspberry Pi. You can use mulitiple relay modules stacked together to add many channels; You can stack up to four layers.
The 4 Channel module is very fast, easy to install, and supports multi-language development, making it ideal for smart home projects

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