Dimmers for 12 and 24 volt lighting, such as LED strips. You can choose from built-in and surface-mounted dimmers, wireless dimmers with remote control, and smart controllers that you operate via Wi-Fi using an app.
A 12-24V dimmer is placed after the transformer, on the low-voltage side. If you want to dim the strip using the wall switch, you will instead need a dimmable transformer and a 230V dimmer.