# Smart controller without machines

{% hint style="info" %}
This solution is compatible with the **PULSE protocol** only.
{% endhint %}

Sometimes our goal involves processing a payment and displaying a notification on the screen to confirm that a payment has been completed. In such cases, we connect the payment system to the controller plugged into a power socket.

This approach was used in an amusement park for a Ferris wheel. We processed the payment, and once the administrator confirmed that the payment was successful, the client was granted access to the attraction.

There are various usage scenarios for this system. Some examples we have encountered include:

1. Ferris wheel
2. Cinema entrance
3. Shooting gallery
4. Shower stall at a gas station

<figure><img src="/files/hV9WvDx3p7Hfu3wQ5BNu" alt=""><figcaption></figcaption></figure>


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