1 Minute Timer Circuit using IC 555

As the name suggest 555 timer is basically a “Timer”, which create an oscillating pulse. It means for some time output pin 3 is HIGH and for some time it remains LOW, that will create a oscillating output. We can use this property of 555 timer to create various timer circuits like 1 minute timer circuit, 5 minute timer circuit, 10 minute timer circuit, 15 minute timer circuit, etc. All we need to change the value of Resistor R1 and/or Capacitor C1. We need to set 555 timer in Monostable mode to build Timer. In monostable mode, the duration for which the PIN 3 would remain HIGH, is given by the below formulae:

T = 1.1 * R1*C1

So to build 1 minute (60 seconds) timer we need resistor of value 55k ohm and capacitor of 1000uF:

1.1*55k*1000uF

(1.1*55*1000*1000)/1000000 = 60.5 ~ 60 seconds.

1 Minute Timer Circuit Diagram

 

A variable resistor of 1M is used here and set on 55k ohm (measured by multimeter). We can easily calculate the resistor value for 5 minute, 10 minute and 15 minute timer circuit:

 

5 Minute Timer Circuit

5*60 = 1.1 * R1 * 1000 uF

R1 = 272.7 k ohm

So to build a 5 minute timer circuit, we would be simply changing the resitor value to 272.7k ohm in above given 1 minute timer circuit.

 

10 Minute Timer Circuit

10*60 = 1.1*R1*1000 uF

R1 = 545.4 k ohm

Similarly to create a 10 minute timer we would be changing the resistor value to 545.4 k ohm.

 

15 Minute Timer Circuit

15*60 = 1.1*R1*1000 uF

R1 = 818.2 k ohm

As per above calculations, for a 15 minute timer circuit, we need the value of  resistor to 818.2k ohm.

 

We should note here that we have used LED at reverse logic, means when OUTPUT pin 3 is low, LED will be ON, and when OUTPUT is HIGH then LED will be OFF. So we have calculated OFF time above, means after the calculated time LED will be turned ON. LED will be ON initially (OUTPUT PIN 3 LOW), as soon as we press push button (trigger the 555 via TRIGGER PIN 2), the timer will start, and LED will become OFF (OUTPUT PIN 3 LOW), after the calculated time duration, PIN  3 will again become  LOW, and LED get turned ON.

Video: 

Comments (49)

  • John's picture
    John

    Sooooo, for how long does it remain lit up?

    Oct 13, 2015
  • Abhishek's picture
    Abhishek

    As we have used 555 timer in Monostable mode, it will remain ON untill the next trigger (button press). Here, ON state is Stable state and OFF is Unstable state.

    Oct 22, 2015
  • shivaji 's picture
    shivaji

    i want out put from 555 like 10 min ......30 min square cycle

    Apr 17, 2017
  • Cris's picture
    Cris

    Can this be used to turn off a signal? ie. could I use it to turn off a switch instead of being ON.

    Jan 21, 2016
  • Jayant's picture
    Jayant

    We have connected the LED in reverse logic here. To Turn On the LED just connect the positive terminal of LED to PIN 3 of 555 and negative terminal to Ground.

    Feb 08, 2016
  • Ranjit N's picture
    Ranjit N

    Dear Abhishek / Jayant,
    I want the circuit to switch ON the LED / motor say once in 24 hrs and automatically switch OFF after (say) 30 secs or 1 min (after switching ON). How can this be achieved.

    Jun 26, 2016
  • Abhishek's picture
    Abhishek

    555 Timer IC is not reliable for timers, greater then 10-15 minutes, you should check out IC 4060B for larger duration like 24 hours.

    Jul 09, 2016
  • BGS's picture
    BGS

    Hi, I tried the 15 min timer with the reverse logic(LED is off before the trigger is pressed,but as soon as I power the circuit,LED blinks and is OFF after that irrespective of trigger button being pressed.

    Jun 28, 2016
  • Sovatna PHON's picture
    Sovatna PHON

    Dear Developer,
    Thank you very much for your explanation. It looks great to me, however, is it possible to make the blinking LED (OFF for 2min and ON for 50 sec)? I do not know how to circuit it. Please kindly help me.

    Sovatna,

    Jul 05, 2016
  • Abhishek's picture
    Abhishek

    Yes it can be achievable, you need to configure 555 in Astable mode and change the resistor R1, R2 and capacitor C1 accordingly, check here: 555 in Astable mode. There are lot of 555 calculator available online to calculate these values.

    Jul 09, 2016
  • jyoti's picture
    jyoti

    how to discharge battery after 1 min automatically

    Jul 20, 2016
  • Mansur's picture
    Mansur

    It is a nice work. I would like to use the circuit to control an incubator, how do I go.abut it?

    Jul 23, 2016
  • Jr Burgess's picture
    Jr Burgess

    Hi thanks for your time and effort to help other great job thank you . I'm looking for a timer 10 minute on and reset for 10 minutes ago so 10 on reset 10 off then back on in ten then reset for another around . I hope I'm. M a king Spence I'm a ham radio operator and we have to I'd our station ever ten minutes as long as we are on the radio.some people have burned a chip w I th there call sign I n it . But I could us flash ing red leads I'm not the best at stuff. Like this what do you think .. or a pick buzzer be better or b o th ? Tnx for ur time

    Aug 06, 2016
  • Maddy's picture
    Maddy

    You can do that by configuring 555 in Astable mode, check here for more detail: 555 Timer Astable Multivibrator Circuit Then calculate the value for R1,R2 and C1 for 10 min off and 10 min on setup, by using some online 555 calculator. 

    Aug 20, 2016
  • Tager's picture
    Tager

    Thank you for your work sir, Please I want to drive a relay instead of the
    LED, can you help me?

    Aug 25, 2016
  • Tom's picture
    Tom

    Really bad writing in this, thats not a LED symbol, you confused R1 with RV1

    Aug 30, 2016
  • ram's picture
    ram

    I want to turn on my certain circuit for 30 minutes and after 30 minutes i want it to be off state. Does this circuit can sort out my problem. Moreover, I want the output of the timer circuit to be 14V, is it possible?.

    Nov 11, 2016
  • rj's picture
    rj

    how to make a timer circuit in which the switch is triggered and the light remains on around 30 sec and off automatically

    Nov 27, 2016
  • Abhishek's picture
    Abhishek

    Connect the LED in opposite direction and make the timer of 30sec using given formula.

    Dec 02, 2016
  • seyyid's picture
    seyyid

    hello,
    can i use this circuit to make 30 min timer? or should i use another ic?

    Dec 10, 2016
  • Abhishek's picture
    Abhishek

    For 30 minutes IC 555 is fine, but 555 Timer IC is not reliable for greater time duration you should check out IC 4060B for larger duration like 24 hours.

    Dec 31, 2016
  • mujey's picture
    mujey

    how to make a big display with led strips 1 minute with 12v. can you help with the schematic. digit length should be 12 inch hieght and 6 inch wide

    Jan 18, 2017
  • Henk's picture
    Henk

    Error in schematic, R1 must connect to pin 2 of the 555 to keep Trigger pin 2 high untill you push the switch!

    Jan 20, 2017
  • nikhil gour's picture
    nikhil gour

    As we know that cooler have a water pump which is used to regulated the water from bottom to top.i want to create a timer circuit which is used to on off the pump at a time period of 1 min.a running pump off after 1 min it's on and again off after a 1min.,this process have still continue till the cooler is on...
    It can we possible or not...

    Feb 02, 2017
  • Abhishek Goyal's picture
    Abhishek Goyal

    Yes it is possible..

    Apr 21, 2018
  • Jenny's picture
    Jenny

    I want an electronic timer that will accurately time up to five minutes in one-minute steps before giving an audible (pulsing) or visual (flashing LED) warning that time is up.

    Mar 10, 2017
  • Cheery's picture
    Cheery

    Thanks for the wonderful post here. Please I want to build a timer circuit that will be activated by another circuit and the timer circuit should run for 5minutes before turning off automatically. A manual override can also reset the circuit to make it ready for another triggering. Please can I modify this circuit to achieve that? It's more like a delay circuit with automatic and manual reset. Thanks a lot in anticipation of your kind assistance.

    Mar 14, 2017
  • Deepak Singla's picture
    Deepak Singla

    I am using two relay in my circuit using 555 timer IC. is it possible that when i switch on the power and then after 30 second both relay will operate at once and after 10 second of that one relay goes off and other remains on
    Please help me with this circuit..

    Apr 02, 2017
  • Maddy's picture
    Maddy

    It is possible but circuit will become complex, you may need to use 2 or 3 555 ICs and Op-amp, better use some Microcontroller.

    Jul 07, 2017
  • aman pradhan's picture
    aman pradhan

    i want to know applications of one minute timer circuit.reply asap...thanks

    May 18, 2017
  • Muhammad Hamza Baig's picture
    Muhammad Hamza Baig

    Dear can i use it to control time for a washing machine or some more things like that

    May 30, 2017
  • Mike's picture
    Mike

    There are flaws with the circuit, the 10K resistor top left is simply connected all the time between +9V and ground -ve rail thereby drawing power for no useful purpose, you need to connect 10K bottom leg to the pin 2 of the 555 timer, so that it is held at 9V+ through this 10k (pulled high) so when you push the switch then pin 2 goes low (-ve) to trigger.

    secondly if you use bigger capacitors like 1000uF, your timings are going to be miles out, as there is usually very large leakages on higher the capacitor values are, so this circuit may not time if you use very large value capacitors, one should make sure the leakage current is less than the timing current through the variable timing resistor.

    thirdly, when the timer trips, the large 1000uF cap will have stored so much charge on it, and all of it will be discharged when next arming the timer, this means all of that energy stored in the cap will dissipate suddenly when you press the button and can cause failure.

    Jun 13, 2017
  • Himanshu's picture
    Himanshu

    Can i make this led connected in a manner,so when i push the button it will be "ON" for 5 minutes.

    Jun 26, 2017
  • adi_stef's picture
    adi_stef

    Hi,
    Are you sure that R1 is connected across the Vcc and Gnd rails? I think one end should be connected to Vcc and the other one to Pin2, to keep it high, and when you trigger the pin, then you make the low trigger impulse connectig Pin2 to Gnd. No? Thank you

    Jul 06, 2017
  • randy's picture
    randy

    I need to make a circuit that when the switch is momentary pushed, it starts the timing circuit on for 15 seconds, however, if the same button is pushed again within that 15 seconds, it cancels the timer and turns the output off. push it again and starts the 15 seconds on again. so its using one switch to start and stop the timing circuit. i cannot seem to figure out how to do it using only one switch. can anyone help me?

    Nov 04, 2017
  • Gerald's picture
    Gerald

    I really love this and I need someone to put me through

    Nov 12, 2017
  • Muhammad Furqan's picture
    Muhammad Furqan

    I saw in a book that a capacitor of small voltage is connected to control voltage. Is it necessary for the usage of 555 timer in monostable mode

    Nov 17, 2017
  • Ademola's picture
    Ademola

    What will happen to circuit if the key is permanently closed?

    Jan 27, 2018
  • AISHA's picture
    AISHA

    The timer will go on for ever. It will turn off after 1 minute once you open the key 

    Jan 30, 2018
  • sreerag's picture
    sreerag

    Hi in the above circuit provided, the resistor R1 should be connected directly to the pin.2 of 555.Then switch to GND from pin.2

    Feb 02, 2018
  • Thale's picture
    Thale

    Hi, do you have a fully component list.
    What type of button do you use? And LED?
    With spesification like how much current it can take before it breaks etc.

    Feb 05, 2018
  • AISHA's picture
    AISHA

    You can use anything it does not mater much

    Feb 07, 2018
  • Zoli's picture
    Zoli

    Hi. Maybe u could help me. This project is for an airsoft game. I need an alarm to go on every 5 minutes , and stay on for like 5-10 seconds.
    Thank you.

    Feb 19, 2018
  • aykut's picture
    aykut

    Unfortunality, We implemented this circuit design on Proteus/ISIS but it doesnt work :(
    What is your suggestion?

    Apr 24, 2018

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