Arcade machines are beloved for their nostalgic charm and engaging gameplay, but their functionality relies heavily on modular components that can be easily replaced or upgraded. The most common types of modular components in arcade machines include:

1. Joysticks: These are the primary control devices, allowing players to navigate characters or objects on the screen. They come in various styles, such as 4-way and 8-way, to suit different game genres.

2. Buttons: Arcade buttons are used for actions like jumping, shooting, or selecting options. They are typically color-coded and designed for durability to withstand heavy use.

3. Coin Mechanisms: Essential for commercial arcades, these components accept coins or tokens and validate them to start gameplay. Modern versions may also support card readers or digital payments.

4. Control Panels: These modular panels house joysticks and buttons, often designed for easy removal and customization to fit different game setups.

5. Monitors/Displays: While not always modular, many arcade machines feature replaceable CRT or LCD screens to ensure crisp visuals and longevity.

Understanding these components helps enthusiasts maintain, repair, or customize their arcade machines for optimal performance and enjoyment.