EMC2101 Fan Controller and Temperature sensor
The EMC2101 from Microchip/SMSC is a 1 degree C accurate fan controller with temperature monitoring and it will take care of all of that for you. Those extra pins allow you to set a the speed of the fan, and in the additional pin of a 4-pin connector adds a tachometer output that allows you (or the EMC2101) to monitor the speed of the fan to make sure it's working as expected. In addition to allowing you to control a fan, the EMC2101 includes an internal temperature sensor, as well as connections for an external temperature sensing diode. If you use an external temperature sensor, you can even configure a look up table (LUT) that allows you to set different fan speeds depending on the temperature, and the EMC2101 will automatically adjust the speed depending on the temperature.
Adafruit TMP117 High Accuracy I2C Temperature Monitor
The TMP117 Precision Temperature Sensor is an I2C temperature sensor that will help you easily add temperature measurement and adjustment to your project. In addition to the obvious support for reading the temperature, the TMP117 can also monitor the temperature and alert you when corrective action needs to be taken.
Adafruit 9-DOF Orientation IMU Fusion Breakout - BNO085
The BNO085 is the perfect sensor for any navigation or motion project. It does all the sensor fusion for you and puts it on an easy-to-use breakout board with solderless Stemma QT connectors and support circuitry. Drivers, wiring diagrams, and examples will help find your bearings
Adafruit Universal USB / DC / Solar Lithium Ion/Polymer charger - bq24074
This charger is the only one you need to keep all your Lithium Polymer (LiPoly) or Lithium Ion (LiIon) rechargeable batteries topped up. No matter the power source at your disposal!
Adafruit TE MS8607 PHT Sensor
Because of their many applications, Pressure, Temperature, and Humidity sensors (PHT sensors) are a common offering from semiconductor companies. The MS8607 PHT sensor from TE Connectivity does an admirable job of measuring a wide range of all three environmental conditions. Each and every MS8607 sensor is calibrated at the factory and the calibration constants stored in the sensor itself. This sensor is a one stop shop for all your common weather and environmental related metrics. Just add a MS8607 and you’lll be ready to finish your enclosure and retire as a Dubia Cockroach Farmer
Adafruit AS7341 10-Channel Light / Color Sensor Breakout
The AS7341 by AMS is a multi-channel spectrometer which is a special type of light sensor that is able to detect not only the amount of light present, but also the amounts of light within different wavelengths.
Adafruit TDK InvenSense ICM-20948 9-DoF IMU
When you want to sense orientation using inertial measurements, you need an Inertial Measurement Unit, and when it comes to IMUs, the more DoFs, the better! The ICM20948 from Invensense packs 9 Degrees of freedom into a teeny package, making it a one stop shop for all the DOFs you need! Within it’s svelte 3x3mm package there are not just one MEMS sensor die like your common sensors, but two sensor dies! The ICM20948 pair’s Invensense’s MEMS 3-axis accelerometer and gyro with the AK09916 3-axis magnetometer from Asahi Kasei Microdevices Corporation.
Adafruit BH1750 Ambient Light Sensor
This is the BH1750 16-bit Ambient Light sensor from Rohm. Because of how important it is to humans an most other living things, sensing the amount of light in an environment is a common place to get started when learning to work with microcontrollers and sensors. Should we turn up the brightness of our display or dim it to save power? Which direction should your robot move to stay in an area with the most light? Is it day or night? All of these questions can be answered with the help of the BH1750. It's a small, capable and inexpensive light sensor that you can include into your next project to add the detection and measurement of light.
Adafruit PCF8591 Basic 4 x ADC + DAC Breakout
Measuring voltage and adjusting it is what electronics is all about so you won’t get far without friends like the PCF8591 ADC+DAC combo. Analog to Digital Converters help by measuring an analog voltage and turning it into something a microcontroller like a Metro or Arduino
can understand. If you’re using a single board computer like a Raspberry Pi, you might not have any other way to measure a voltage because even though they are well equipped for digital circuits, many boards of that type don’t have any pins that can measure analog voltages.
Adding a PCF8591 to your electronics project will give you not one, not two but four analog inputs that you can use to measure voltages from. If knobs are just the thing to complete your project, just add a PCF8591 and some potentiometers and you’re ready to twist, turn, twiddle and tweak to get things just right
Adafruit DS1841 I2C Logarithmic Resistor
Potentiometers are the perfect tool when you want to change your circuit by turning a knob. Turns out, there are times when you want to adjust your circuit without manually turning a knob, and the DS1841 I2C Logarithmic Resistor from Maxim can do just that.
Adafruit Sensirion SHTC3 - Temperature & Humidity Sensor Breakout
Sensirion Temperature/Humidity sensors are some of the finest & highest-accuracy devices you can get. And with a true I2C interface, reading the data is for easy. The SHTC3 sensor has an excellent ±2% relative humidity and ±0.2°C accuracy for most uses.
Circuit Playground Bluefruit Automatic Bike Brake Light
This project makes use of two of the many features available on Circuit Playgrounds; the accelerometer and the NeoPixels. It uses the accelerometer to sense if the bike is braking and then uses the NeoPixels to indicate that the bike is slowing down.
Adafruit H3LIS331 and LIS331 High-g 3-Axis Accelerometers
The LIS331HH and H3LIS331 3-axis accelerometers from ST provide the user with high-g acceleration sensing like never before seen from an ST LIS3xx accelerometer. The more humble of the two, the LIS331HH can measure up to a range of +/- 24g on each of its three axes. The flashier H3LIS331 doesn't play around and will measure as much as +/- 400g. That's no typo!
Adafruit HTS221 - Temperature & Humidity Sensor
The HTS221 is an inexpensive humidity sensor which makes it great for every day measurement applications. Want to measure the humidity of your bathroom? Sure! How about your mushroom farm? Perfect!
Adafruit LPS25 and LPS22 Barometric Pressure and Temperature Sensors
I've got news for you: we're all sitting at the bottom of an ocean of nitrogen, oxygen, and other gasses. Just like a whale would have trouble breathing if it weren't under an ocean of ocean water, we would have a hard time getting oxygen and nitrogen into our lungs if we weren't swimming in it. Because we're used to being under all this air, for us it's relatively normal to us and we don't have a good way of sensing how much there is.
It takes an absolute pressure sensor like the ST LPS25 to tell us how much air we're swimming around in. An absolute pressure sensor can tell you how much gas you're ensconced in, measured in hectopascals (hPa). The absolute part means that it is compared to the absolute vacuum of space. At sea level, the official pressure level is 1013.25 hPa! That's a lot of Pascals!