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Product 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
4 channel relay
Support I2C protocol
Support for stacking
Support multi-language programming
Support 3A 250V AC
Support 3A 30V DC
Support address switching by dial switch
Support relay status light prompt
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
Packing List:
1 * 4-Channel Relay Hat Board
4 * M2.5x11+6 copper stick
8 * M2.5x5 screws & nuts
1 * Instructions
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
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We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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