A piezoelectric disc generates voltage when bent or struck and can act as an actuator when driven by an alternating voltage. Its pulse may reach a high…
The KY-039 uses adjacent infrared emitter and detector components to observe pulse-related changes in reflected light with suitable contact. It is an…
The SW-520D is a ball-type tilt and vibration switch, not a mercury switch. A conductive ball moves inside and opens or closes the contact with…
The prototype demonstrates vehicle detection and servo motion, but one range sensor and a fixed delay are not enough for a safe real barrier. Prototype…