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Arduino Development Cookbook by Cornel Amariei

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The toggle switch

A toggle switch can be very useful for various projects. It can hold one or more constant states. For example, we can have a few of them and configure a certain system to work a certain way based on the configuration. This is done all the time on computer motherboards and other electronic devices.

A two-state toggle switch is just like a standard push button; only, it remains in the state we put it in. An on-off switch is a two-state toggle switch. It becomes more useful when we have a three-state toggle switch as in this recipe. It has two usable states and an off state.

In this recipe, we will use a basic toggle switch to light up two LEDs. When the toggle switch is in one end position, only one LED will be switched on. If it ...

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