555 Timer Calculator
This page is very useful when creating 555 timer circuits. it will allow you to calculate the frequency and duty cycle.Monostable 555 Timeout Calculator
This calculator software will help you to calculate the timeout value (D) for a Monostable 555 Timer Circuit. When the monostable circuit is powered the output initially starts with high, the timer counts using R and C components, and as soon as the delay time elapses, the output then goes low and remains low until the power is switched ON and OFF again.
The formula used is:
Time Out Delay (secs) = 1.1 * R1 * C1
To use this calculator simply enter values for R1 and C1, then press Calculate.
REMEMBER, THE CAPACITOR MUST BE ENTERED IN FARADS.
THE FOLLOWING SOFTWARE ALSO CALCULATES THE DELAY TIME FOR A IC 555 MONOSTABLE, BUT IT ALLOWS YOU TO ENTER THE CAPACITOR VALUE IN MICROFARADS
This page deals with monostable multivibrator pulse duration (i.e. width) calculator. It is 555 IC based calculator which uses the R and C values as inputs and helps you to get the pulse width or pulse period or pulse duration (Tp) as output calculation.
EXAMPLE:
Inputs: Resistance (R1) = 220K-Ohm, Capacitance (C1) = 1 µF
Outputs: Pulse Duration (or Pulse Width) = 0.242 second or 242 ms
adeleye says
please my honorable mentor i need a stable timer delay circuit that can delay up to 5minute before it will go off and never come back until i reset it back.thanks
Swagatam says
Adeleye, you can try the second circuit from the following article:
https://www.homemade-circuits.com/how-to-make-long-duration-timer-circuit/
Kenan says
Hi mate
kindly I’d ask please for a circuit I’m trying to design depends on square wave . the circuit is about electroplating by the square wave instead of dc voltage. the frequency would be variable between 10-50HZ and the duty cycle 50%. what would the circuit and components would be please?, and in case of 555timer datasheet gives 200mA max current what the extra components i would add to the circuit to make adjustable current rises up to 1A and would that affect the output voltage. Can I put adjustable resistor to the Vcc only and would it drop the output voltage.
I owe you the most thanks
Regards
Swagatam says
Hi Kenan, I would recommend a 4060 based design, as given in the second last diagram from this article:
https://www.homemade-circuits.com/how-to-make-simple-versatile-timer/
The LEDs are optional. Use a 2N2222 instead of BC547 for the transistor
IC 555 is not good.
Tanaka says
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!
Swagatam says
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
Tanaka says
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
Swagatam says
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.
slavo says
izvanrednoo!