**Pin Number** | **Pin Name** | **Description** |
1 | Vcc | Input voltage is +5V for typical applications. Can range from 4.5V- 12V |
2 | High/Low Ouput (Dout) | Digital pulse high (3.3V) when triggered (motion detected) digital low(0V) when idle(no motion detected |
3 | Ground | Connected to ground of circuit |
**Pin Number** | **Pin Name** | **Description** |
1 | Adjust/Ground | This pins adjusts the output voltage, if it is a fixed voltage regulator it acts as ground |
2 | Output Voltage (Vout) | The regulated output voltage set by the adjust pin can be obtained from this pin |
3 | Input Voltage (Vin) | The input voltage |
**No:** | **Pin Name** | **Description** |
**For DHT22 Sensor** | ||
1 | Vcc | Power supply 3.5V to 5.5V |
2 | Data | Outputs both Temperature and Humidity through serial Data |
3 | NC | No Connection and hence not used |
4 | Ground | Connected to the ground of the circuit |
**For DHT22 Module** | ||
1 | Vcc | Power supply 3.5V to 5.5V |
2 | Data | Outputs both Temperature and Humidity through serial Data |
3 | Ground | Connected to the ground of the circuit |