This what I used to do regularly AT89C51 single-chip controller, up to eight different output pulse time period. And with TS1602 LCD display. Documents, including source code and simulation of circuit schematics

TimerControl
............\B42J385.C
............\B42J385.LST
............\delay.c
............\delay.h
............\delay.LST
............\delay.OBJ
............\Last Loaded sss.DBK
............\Main.C
............\Main.LST
............\Main.OBJ
............\Port.h
............\sss.DSN
............\sss.PWI
............\STARTUP.A51
............\STARTUP.LST
............\STARTUP.OBJ
............\TimerControl
............\TimerControl.hex
............\TimerControl.lnp
............\TimerControl.M51
............\TimerControl.Opt
............\TimerControl.plg
............\TimerControl.Uv2
............\TimerControl_Opt.Bak
............\TimerControl_Uv2.Bak
............\TS1620.C
............\TS1620.h
............\TS1620.LST
............\TS1620.OBJ
............\定时控制.pdf

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