- Carrier Frequency: 38kHz
- Supply Voltage: 2.7 to 5.5V
- Supply Current: 350 A
- Transmission Range: 45M
- Directivity: 45 Degree
The DHT22 (also known by RHT-03) is a low cost humidity and temperature sensor with a single wire digital interface. The sensor is calibrated and doesn t require extra components so you can get right to measuring relative humidity and temperature.
This semiconductor gas sensor detects the presence of LPG, isobutane, and propane at concentrations from 300 to 10,000 ppm. The sensor s simple analog voltage interface requires only one analog input pin from your microcontroller.
This breakout board is the simplest way to create a project with mutiple capacitive touch sensors. No microcontroller is required here – just power with 1.8 to 5.5VDC and connect up to 5 conductive pads to the 5 left-hand pins. When a capacitive load is detected (e.g. a person touches one of the conductive contacts) the corresponding LED on the right lights up and the output pin goes low. You can use this to update an existing normal-button project where buttons connect to ground when pressed.
This breakout board is the simplest way to create a project with a single “momentary” capacitive touch sensor. No microcontroller is required here – just power with 1.8 to 5.5VDC and touch the pad to activate the sensor. When a capacitive load is detected (e.g. a person touches the sensor-pad area) the red LED lights up and the output pin goes high. You can also solder a wire to the middle pad and create your own capacitive pad if the built-in one isn’t suited to your project.
The MCP9701A is an analog temperature sensor which has a measurement range of 0 to +70 Degree C.