Digital Tachometer Speed Module Sensor for Arduino UNO

Optical Slot Coupler: Uses a 5.9mm wide groove housing an infrared LED paired with an NPN phototransistor to detect passing encoder wheel spokes. Schottky / Schmitt Trigger Debouncing: Features an onboard Schmitt trigger hardware inverter to filter micro-reflections and deliver a stable digital wave. Direct Microcontroller Pairing: Outputs clean TTL...