Decoding the MH Flying Fish IR Sensor: Why Your Datasheet is Broken (And How to Fix It)
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).
Here are the verified specifications. Ignore any PDF that claims different voltages or pinouts without looking at the back of the board. Mh Sensor Series Flying Fish Ir Sensor Datasheet Fixed
Stop reading the fake datasheet and run this code instead:
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. Decoding the MH Flying Fish IR Sensor: Why
if (sensorState == LOW) { // Object is close digitalWrite(ledPin, HIGH); Serial.println("Object Detected!"); } else { digitalWrite(ledPin, LOW); Serial.println("Clear"); } delay(100); }
Today, we are going to fix that. Here is the actual working datasheet for the MH Flying Fish IR Sensor—no confusion included. The pot adjusts the threshold
If your sensor isn't working like the "broken" datasheet said, here is the troubleshooting guide: