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Speed Sensor Module Tacho Sensor Slot-type Optocoupler Tacho-generator Counter Module Module for use: 1. module slot unobstructed, receiver tube conduction module DO output low, when blocked, DO output high; 2. DO output interface can be directly connected to the microcontroller IO port, whether the sensor with barriers, such as the motor speed can be detected with the motor encoder. 3. DO module can be connected to relays, limit switches and other functional composition, and to be connected with active buzzer module, consisting of alarm. Module features: 1, the use of imported groove coupler sensor, slot width 5mm. 2, output status indicator lamp output high, output low lights. 3, block, output high; no shelter, output low. 4, the comparator output signal clean, good waveform, driving ability, than 15mA. 5, the working voltage of 3.3V-5V 6, the output format: digital switching output (0 and 1) 7, a fixed bolt holes for easy installation 8, small PCB board size: 3.2cm x 1.4cm 9, using a wide voltage comparator LM393 Product wiring instructions: 1, VCC positive power supply 3.3-5V 2, GND power supply is negative 3, DO TTL switching signal output 4, AO this module does not work Before purchase: 1.All the goods are ready stock, we will arrange the shipment at once if we receive the order. 2.Please read the item description, if you have any question, do not hesitate to contact us. 3.Use the vouchers for more saving. Shipment： 1.1-2 days to ship(except for the pro-order item) After purchase: 1.If you are satisfied，please give us 5 stars praise. 2.Please contact us before you are going to give us bad review. We are helpful and will solve the problems. if you receive a defect item,please contact us at once with item picture or vide #Speed #Sensor #Module #Tacho #Sensor #Slot-type #Optocoupler #Tacho-generator #Counter #Module #for #arduino