ADS1220 24 bit ADC SPI. Board 40mm x 25mm - ideal to breadboard. Splitet ground, well decoupled with capacitors and ferrite beads. RC filter on all analog inputs.DGND and AGND can be joined together. For better accuracy should be ground plated.
A Mini weather station based on ESP-12. Include a BME280 or BME680 sensor chip on board, one or more DS18B20 onewire sensors. It's powered by a Lithium cell, can be for short time directly charged over present voltage input. A LDO with very low Iq included. Comes with voltage measurement for the connected battery. Hardware jumper for deep-sleep and a programming connector (charge the battery if +5...
An air quality measurement board to be used as HAT on top of the Raspberry Pi B+.
It should be easy to use thanks to the on-board labeling of all headers.
It can measure air...
- pressure (via BMP180 module board "GY-68" or compatible)
- and volatile organic compounds (VOC) via four MQ gas sensor slots of your choice
Additionally it can drive WS1812B LEDs...