Smartphone is Getting more smart with Gas sensors
Smartphone is Getting more smart New things are gonna come in the smartphones. Now smartphones can sense Gases like CO2, ethanol, or nearly any other noxious gas with there new gas sensor( CCS811). Working :- the very top layer of the chip has a metal-oxide layer (such as tin-oxide for VOCs) with gold contacts beneath it that measure the resistance of the metal oxide. Underneath the gold interconnections is the tiny hot plate that heats the whole assembly, thereby changing the resistance of the top layer in direct proportion to the gas coming in the package (through a hole). The newest digital version then uses a Silicon Labs 8051 microcontroller to measure the resistance between the gold electrodes and buffer its changes in real time. When it passes a given level, an alarm interrupt is sent to the application processor in the smartphone (or the application processor polls the 8051 periodically to empty its buffer and draw a parts...