Here are the verified specifications. Ignore any PDF that claims different voltages or pinouts without looking at the back of the board.
But there is one annoying problem:
You don't need a "fixed" datasheet; you just needed the correct one. The MH Flying Fish is a TCRT5000 reflective sensor paired with an LM393 comparator. Treat it as a digital switch that triggers when something gets within 2cm. Mh Sensor Series Flying Fish Ir Sensor Datasheet Fixed
// MH Flying Fish IR Sensor Test int sensorPin = 2; // Digital Pin 2 int ledPin = 13; // Built-in LED void setup() { pinMode(sensorPin, INPUT); pinMode(ledPin, OUTPUT); Serial.begin(9600); } Here are the verified specifications
The datasheet says "20cm"? Lie. This is a proximity sensor, not a distance sensor. Max reliable range is ~2.5cm (1 inch). If you need long range, buy an ultrasonic or Time-of-Flight (VL53L0X) sensor. The MH Flying Fish is a TCRT5000 reflective