PinoutHub

The DHT22 is a digital temperature and humidity sensor by Aosong Electronics, also sold under the name AM2302. It measures both parameters through a single data line and outputs fully calibrated digital readings — no ADC, no analog noise, no external calibration required. For projects where the DHT11’s ±2°C accuracy and limited humidity range aren’t … Read more

The MQ2 is an analog gas sensor by Hanwei Electronics that detects flammable gases and smoke by measuring changes in electrical resistance across a heated tin dioxide element. It outputs both an analog voltage proportional to gas concentration and a digital threshold signal, making it straightforward to wire into any microcontroller project without needing a … Read more

The TMP36 is a low-voltage analog temperature sensor by Analog Devices, designed for use in electronics, embedded systems, and microcontroller-based projects. It measures temperature by outputting an analog voltage that scales linearly with degrees Celsius — no external calibration, no complex interface, just a voltage your ADC can read directly. Its wide supply range of … Read more

The DHT12 is a digital temperature and humidity sensor by Aosong Electronics — the same manufacturer behind the DHT11. It measures both environmental parameters and outputs calibrated digital data, but adds something the DHT11 never had: an I2C interface alongside the original single-wire protocol. That dual-interface design makes it a more flexible drop-in for projects … Read more

The BME280 is a digital environmental sensor that measures temperature, humidity, and barometric pressure simultaneously — three parameters, one IC, one I²C or SPI connection. It is factory-calibrated, runs on as little as 1.71V, and draws under 4µA when sampling all three sensors at 1Hz, making it as practical in a coin-cell-powered weather node as … Read more

The DHT11 is one of the most widely used digital temperature and humidity sensors in Arduino and electronics projects. It measures both temperature and relative humidity using a single digital output pin, and is commonly found in weather stations, HVAC systems, greenhouses, and home automation projects. What is DHT11? The DHT11 is a basic integrated … Read more

If you need to measure temperature across a long cable, in wet environments, or from a dozen different points using a single wire, the DS18B20 is the sensor built for that job. It is a digital temperature sensor that communicates over the 1-Wire protocol, and shows up everywhere from aquarium controllers and soil monitoring systems … Read more

The LM35 is one of the most popular analog temperature sensors used in Arduino and electronics projects. It measures temperature by outputting a voltage directly proportional to degrees Celsius, and is widely used in weather stations, industrial monitoring systems, and home automation projects. What is LM35? The LM35 is a precision integrated-circuit temperature sensor designed … Read more