About the product
- It integrates 4-channel 5V relay module, and is fully compatible with R3 control board.
- The 4-channel relay module shield is active at HIGH level.
- Relay Terminals: high-power, high-current high voltage can be connected to the device.
- Separately connect the 4-channel relay to digital port 4, 5, 6, 7 on the R3 control board, then through controlling output HIGH or LOW to control the relay on and off.
- How to use: search for \"keyestudio wiki ks0251\" in Google Chrome to get the wiki online tutorial for this product.
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