By 1602, stc89c52 microcontroller, ds18b20 temperature sensor, four-button adjustment of the LCD screen displays temperature-time, the red light above 30 degrees, 0 degrees below the yellow light, green light the other temperature ranges

lcd1602 ds18b20 at89c51
........................\l
........................\l.c
........................\l.hex
........................\l.lnp
........................\l.LST
........................\l.M51
........................\l.OBJ
........................\l.Opt
........................\l.opt.bak
........................\l.plg
........................\l.Uv2
........................\l.Uv2.bak
........................\l.uvopt
........................\l.uvproj
........................\Last Loaded LCD1602.DBK
........................\LCD1602.DSN
........................\LCD1602.PWI
........................\l_Opt.Bak
........................\l_uvopt.bak
........................\STARTUP.A51
........................\STARTUP.LST
........................\STARTUP.OBJ

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