The RelayBoard is an expandable board with just 3 pins to control. It allows you to trigger up to 8 relays per board. With more than one board connected, it makes it possible to control from 8, 16, 24, and up to 80 relays using just one micro-controller. This library was developed for Arduino to facilitate the control of all relays, that way it could determine which board will be triggered. It's an easy-to-use board and extremely practical. It is a great solution to applications where it will be needed to do several triggers, generally found in automation projects.
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