School race made ​ ​ a PM2.5 measuring instrument, using pm2.5 sensor DSM501A measured concentrations of PM2.5 and put it into pulses, pulses detected by the microcontroller 51 and convert it to digital, after conversion, send to LCD1602 display.

pm2.5lcd
........\STARTUP.A51
........\STARTUP.LST
........\STARTUP.OBJ
........\pm2.5.LST
........\pm2.5.OBJ
........\pm2.5.c
........\pm2.51.LST
........\pm2.51.OBJ
........\pm2.51.c
........\pm2.5lcd
........\pm2.5lcd.plg
........\pm2.5lcd.uvopt
........\pm2.5lcd.uvproj
........\pm2.5lcd_uvopt.bak
........\pm2.5lcd_uvproj.bak
........\pm2.M51
........\pm2.hex
........\pm2.lnp

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