PIR sensors are used to detect motion from pets/humanoids from about 5 meters away (possibly works on zombies, not guaranteed). This sensor is much smaller than most PIR modules, which makes it great for unobtrusive projects.
PIR sensors are used to detect motion from pets/humanoids from about 5 meters away (possibly works on zombies, not guaranteed). This sensor is much smaller than most PIR modules, which makes it great for unobtrusive projects.
Ground connection. Adafruit product page says to connect pin #1 to ground.
On-time delay setting input. Adafruit says connect pin #2 to ground for an on time of 2 seconds, or use a resistor divider to set delay time.
3.3V power input. Adafruit product page says to connect pin #3 to 3.3V and run the sensor on 3.3V power.
Digital PIR motion signal output. Adafruit says to check signal on pin #4 and describes the digital output as 3.3V high/low.
| Pin | Position | Type | Function | Voltage |
|---|---|---|---|---|
| Pin 1 / GND | 1 | ground | Ground connection. Adafruit product page says to connect pin #1 to ground. | 0V |
| Pin 2 / on-time set | 2 | control | On-time delay setting input. Adafruit says connect pin #2 to ground for an on time of 2 seconds, or use a resistor divider to set delay time. | 0V to 3.3V delay-setting input per Adafruit product page |
| Pin 3 / 3.3V | 3 | power | 3.3V power input. Adafruit product page says to connect pin #3 to 3.3V and run the sensor on 3.3V power. | 3.3V |
| Pin 4 / signal | 4 | signal | Digital PIR motion signal output. Adafruit says to check signal on pin #4 and describes the digital output as 3.3V high/low. |
0V · 0V to 3.3V delay-setting input per Adafruit product page
Verify supply voltage and logic levels before powering up.
Module pins: Pin 3 / 3.3V, Pin 1 / GND, Pin 4 / signal. Schematik maps them to your board in the app.
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| 3.3V logic high/low output per Adafruit product page |