Find many great new & used options and get the best deals for Slot Type IR Optocoupler Speed Sensor Module LM for Arduino / 51 / AVR / PIC at the best. . Arduino sensor slot de calidad con envío gratis a todo el mundo en AliExpress. dependent on several variables. the one which is covered with a lens, consists of two slots and both these slots are made up of IR. Module DO connected to the relay. 5Pcs Speed Sensor Module Slot-Type Ir Optocoupler LM Voor Arduino Groove Koppeling Sensor V-5V Aansluiten Relais Buzzer ; Suministros para manualidades. Product Name: Slotted Optical Switch; Model: HYH; Output Type: Photo Transistor; Peak Emission Wavelength: nm; IR Diode Forward Current: 50mA;. e. SLOT: Lap timer for Slot and RC cars with arduino, you need an ardunio, IR sensor and LCD serial with i2c module which is a lap timer for a min. Arduino Module. The actual PIR Sensor i. Consisted of an infrared emitter and a phototransistor, is located face-to-face on the optical axes in a leaded [HOST] operation, output phototransistor. Module slot unobstructed, receiver tube conduction module DO output low, shelter, DO output high.