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.
void loop() { int sensorState = digitalRead(sensorPin);
if (sensorState == LOW) { // Object is close digitalWrite(ledPin, HIGH); Serial.println("Object Detected!"); } else { digitalWrite(ledPin, LOW); Serial.println("Clear"); } delay(100); } Mh Sensor Series Flying Fish Ir Sensor Datasheet Fixed
Stop reading the fake datasheet and run this code instead:
But there is one annoying problem:
Today, we are going to fix that. Here is the actual working datasheet for the MH Flying Fish IR Sensor—no confusion included.
Decoding the MH Flying Fish IR Sensor: Why Your Datasheet is Broken (And How to Fix It) If you have a drawer full of sensors,
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).
