The HC-SR05 ultrasonic distance sensor provides an easy way for your projects to measure distances up to 4.5 m.

High sensitivity sound detection module with 2 outputs. AO - analog output, real-time output voltage signal of the microphone. DO - the digital output depends on the sound intensity and the threshold that has been set.

The DHT11 temperature and humidity sensor features a calibrated digital signal output with the temperature and humidity sensor complex. Its technology ensures the high reliability and excellent long-term stability. A high-performance 8-bit micro-controller is connected. This sensor includes a resistive element and a sense of wet NTC temperature measuring devices. It has excellent quality, fast response, anti-interference ability and high cost performance advantages.

Whadda WPSE314 PIR sensors allow to sense motion, almost always used to detect whether a human has moved in or out of the sensor's range.

The Line Tracking Sensor based on TCRT5000 from Vishay is an type of infrared reflectance sensor, and is commonly used in line following robots, it is mounted at the bottom of the robot chassis. The line tracking sensor works by detecting reflected light coming from its own infrared LED and by measuring the amount of reflected infrared light, it can detect transitions from light to dark (lines) or even objects directly in front of it.

This FSR (Force Sensing Resistor) will vary its resistance depending on how much pressure is being applied to the sensing area. A 2.54 mm male pinheader is provided making it easy to use on bread boards.

Ever wondered how good the air quality is in your living room? Or do you need proof of why you fall asleep in a non-ventilated meeting room after 3 hours? Look no further! This air quality sensor combo board will give you the answers in no time!

This air quality combo board senses the atmospheric-quality by using the popular CCS811 and BME280 ICs. It provides a variety of environmental data including barometric pressure, humidity, temperature, TVOCs and equivalent CO2 (or eCO2) levels. Communication is possible through the I2C protocol.

The CCS811 is an exceedingly popular sensor, providing readings for equivalent CO2 (or eCO2) in parts per million (PPM) and total volatile organic compounds in the parts per billion (PPB). The CCS811 also has a feature that allows it to fine-tune its readings if it has access to the current humidity and temperature. Therefore, we added the BME280, which provides humidity, temperature, and barometric pressure. This allows the sensors to work together to give us more accurate readings than they'd be able to provide on their own.

Since the CCS811 heats up a bit, the PCB is precisely designed to not influence the readings of the BME280 sensor.

This package includes a water level sensor and a soil moisture sensor. If the boards have water covering the sensor parts, an analogue value will be available at the "SIG" connection.