IC 555 Timer Monostable Circuit Calculator Software

5 thoughts on “IC 555 Timer Monostable Circuit Calculator Software”

1. Dear Sir,
   i want to design timer circuit 30 minutes with IC555, power supply press the circuit button works 30 minutes then turn off, or active, press the button will turn off, press the button will work. Every 30 minutes, please help me.
   Thank you!

   • Tanaka, you can try the following circuit:
     https://www.homemade-circuits.com/monostable-4/

     calculate C and R using the above calculator

     C3 = 0.01uF

     • Thanks, Swagatam.

       I have followed the instructions and succeeded with both NE555 and CD4060. These two ICs have the disadvantage that the Timer depends on the capacitor, the quality of the capacitor decreases over time. So do you know which IC series has a timer of up to 30 minutes without depending on the capacitor? (excluding IC running by program algorithm)

       thanks

       • Hi Tanaka,

         The modern good quality capacitors will last over 10 years without any deterioration. And you also have tantalum capacitors which might last almost forever.

         Still if you are not satisfied in that case you must go for an Arduino based timer such as this or any other which may be available on the net

         https://www.homemade-circuits.com/lcd-socket-timer-circuit-using-arduino/

         Without programming there’s no other alternative.

2. izvanrednoo!