TECNOULAB 10 Uds Optoacoplador de detección Sensor medición Velocidad óptica ranurado infrarrojo IR

【IR OPTIAL SPEED】☆☆☆Infrared Slotted Optical Speed Measuring Sensor Detection Optocoupler Module. The slot type photoelectric sensor is composed of an infrared light emitting diode and an NPN phototransistor with a groove width of 5.9 mm. As long as the non-transparent object passes through the slot type, it can be triggered (used with the shop's car code wheel) to output TTL low level. 【Specifications】✔Working voltage: 3.3V-5V✔Output form: digital switch OUT output (0 and 1)✔When VCC and GND are connected, the module signal indicator will be on. ✔When blocking, the OUT output is low and the signal indicator is off. ✔The module OUT can be connected to the relay to form a limit switch and other functions, and can also be connected to the active buzzer module to form an alarm. 【Programming】✔The OUT output interface can be directly connected to the IO port of the MCU. ✔Generally, it is connected to an external interrupt to detect whether the sensor has a occlusion. ✔For example, the motor code wheel can detect the motor speed. ✔The OUT port of the speed measuring module is linked to the external interrupt port of the MCU. Whenever there is infrared ray conduction, it is an external buffer. 【Measuring】✔Measuring distance:The speed sensor output is a pulse signal, one pulse is interrupted once; the infrared ray is low when it is turned on, so we set the interrupt to the low level touch mode. ✔Measuring speed:According to the idea of measuring distance, we use an MCU timer to calculate how many external interrupts are received in one second. 【Precautions】✔Correct wiring! Do not reverse the positive and negative, so that the board electronics burn out. ✔Arduino players should set the MCU's I/O port to input mode/receive mode, otherwise they will not be available. ✔Other MCUs, or more advanced control boards, must be set to input mode/receive mode if the I/O port needs to be set to input/output mode.