Fixed — Mh Sensor Series Flying Fish Ir Sensor Datasheet

// 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); }

if (sensorState == LOW) { // Object is close digitalWrite(ledPin, HIGH); Serial.println("Object Detected!"); } else { digitalWrite(ledPin, LOW); Serial.println("Clear"); } delay(100); }

void loop() { int sensorState = digitalRead(sensorPin);

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. Mh Sensor Series Flying Fish Ir Sensor Datasheet Fixed

Stop reading the fake datasheet and run this code instead:

If you have a drawer full of sensors, chances are you have a few green modules labeled MH Sensor Series "Flying Fish" . These are arguably the most common infrared (IR) proximity sensors on the market. They are cheap, reliable for line-following robots and tachometers, and they run on 5V.

Today, we are going to fix that. Here is the actual working datasheet for the MH Flying Fish IR Sensor—no confusion included. // MH Flying Fish IR Sensor Test int

But there is one annoying problem:

Decoding the MH Flying Fish IR Sensor: Why Your Datasheet is Broken (And How to Fix It)

If your sensor isn't working like the "broken" datasheet said, here is the troubleshooting guide: Max reliable range is ~2

Your object is too shiny or too dark. This sensor hates glossy white surfaces (reflects too well) and pure black surfaces (absorbs all IR). For line following, use white tape on black paper.

Here are the verified specifications. Ignore any PDF that claims different voltages or pinouts without looking at the back of the board.

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.

Your potentiometer is mis-set. Turn the blue box trimmer counter-clockwise. The Flying Fish has a digital output, not analog. The pot adjusts the threshold . If the threshold is too low, it will always read "1" (nothing detected).