A DS18B20 1-wire digital thermometer AVR ATmega library

Davide Gironi writes: DS18B20 is a programmable resolution 1-wire digital thermometer. It has an operating temperature range of -55°C to +125°C and is accurate to ±0.5°C over the range of -10°C to +85°C. This library is an AVR implementation to retrive temperature from DS18B20. Built using the reference document: “Using DS18B20 digital temperature sensor on […]

CO2 meter using NDIR infrared MH-Z14 sensor library for AVR ATmega

Davide Gironi writes: MH-Z14 NDIR Infrared gas module is a common type, small size sensor, using non-dispersive infrared (NDIR) principle to detect the existence of CO2 in the air, with good selectivity, non-oxygen dependant and long life. MH-Z14 has a PWM output, with a sensitivity range of 0ppm to 2000ppm CO2, an accurancy of ±200ppm. […]