Digital input/output (DIO) signals are logic signals used in electronic devices to receive (digital input, DI) or send (digital output, DO) binary information. Digital inputs allow devices to detect signals from buttons, sensors or relays, while outputs control components such as LEDs, relays or alarms. DIO signals operate in two states: high (e.g. 3.3 V or 5 V) and low (0 V).
In display systems, DIO can be used to control the backlight, handle sensors, buttons or touch panels. Digital I/O is a standard interface in microcontrollers, industrial PCs, PLCs and embedded or HMI systems, making it a fundamental tool for communication with the outside world in automation and electronics applications.
