Sharp distance sensor GP2Y0 A21 (formerly GP2D12) Key specifications - Operating voltage: 3.3 V or 5 V - Output voltage: 0–3.3 V (0–5 V options) What this gives you - Simple analog interface: provides a voltage that can be read by common microcontrollers via an ADC - Flexible power: supports both 3.3 V and 5 V logic environments - Clear model history: known as GP2D12 in the past, now GP2Y0 A21 2-3 practical use scenarios - Robotics: obstacle detection and basic proximity sensing for navigation and safety - Automation projects: distance-based gating or triggering in conveyors, pick-and-place, or packaging lines - Prototyping and testing: quick distance readouts for sensor integration and experimentation Notes - This description maintains the original model, voltage options, and function, without adding unsupported details.