Hi All,
I am trying to build a circuit to turn lamp on for 10 minutes once any object crosses the light sensor.
I see i can use 555 timer in monostable mode (i have NE555) to do what i need . i found to get 10 min period i should use a large value of R(R~1.2M) and C(C~470u).
Is there a max value for R and C should i consider when i build a monostable circuit ? or can i use the above calculated values without any problem ?
Regards
I am trying to build a circuit to turn lamp on for 10 minutes once any object crosses the light sensor.
I see i can use 555 timer in monostable mode (i have NE555) to do what i need . i found to get 10 min period i should use a large value of R(R~1.2M) and C(C~470u).
Is there a max value for R and C should i consider when i build a monostable circuit ? or can i use the above calculated values without any problem ?
Regards