Hw-416-b Pir Sensor Datasheet ((hot)) ✯ «Trusted»

. It was a "passive" observer, waiting silently to catch the infrared signature of a human body. He carefully wired the three pins: to ground, and the pin to his Arduino’s digital pin 2.

Digital output. Stays HIGH (3.3V) when motion is detected and LOW (0V) when idle. Connect to the common ground of your circuit. Adjustable Controls Sensitivity Potentiometer: hw-416-b pir sensor datasheet

He adjusted this so it wouldn't trigger every time a cold draft drifted past his heater. Digital output

| Feature | Common Assumption | Technical Reality | | :--- | :--- | :--- | | | Custom IC | BIS0001 (Generic PIR Controller) | | Distance Pot | Adjusts range (meters) | Adjusts Amp Gain (sensitivity to motion size) | | Time Pot | 0.3s to 5 mins | Determined by RC constant on Chip Pin 8; usually accurate to the label. | | Logic Mode | Always ON when moving | Requires soldering jumper to 'H' for "Always ON" behavior. | or heat sources | Mount securely

| Problem | Likely Cause | Solution | |---------|--------------|----------| | No output | Warm-up period | Wait 60 seconds after power-on | | Always HIGH | SENS too high | Reduce SENS pot counter-clockwise | | Always LOW | Delay too short or SENS too low | Increase TIME or SENS pot | | False triggers | Vibration, RF noise, or heat sources | Mount securely; add 100nF cap across VCC/GND | | Short detection range | Lens dirty or SENS low | Clean lens; increase SENS |