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Simple 1 minute to 60 minutes Timer Circuit using IC 4011

Last Updated on January 10, 2018 by Admin 8 Comments

This simple NAND gate timer circuit enables you to turn off a selected device after about 1 to 60 minutes. The circuit can be used to turn off gadgets such as radio, tv set, fan, pump etc after a predefined time of 60 minutes. Such a circuit can easily gain a lot of electricity.

The proposed timer circuit is dependent on quad 2 input CMOS IC 4011 (U1). Resistor R1 and capacitor C1 create the long time required. Once push-button S2 is depressed, capacitor C1 discharges and the input of the four NAND gates is pulled to zero. The four short-circuit outputs of U1 become high and activate transistor Q1 to drive the relay. The gadget associated through the use of the relay is switched on. Whenever S2 is released from the C1 starts charging and if the voltage at its positive pin becomes equal to half the supply voltage at the outputs of the U1 becomes zero and the transistor is turned off. This causes the relay to be deactivated and the connected device via the relay is deactivated.

The discussed 1 to 60 minute timer can be made to stop if necessary by pushing switch S1.

simple timer circuit 60 minutes

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About Admin

Hey friends, Thanks a bunch for stopping by this site! I am an engineer with a Bachelor of Engineering in Electronics and Telecommunication. One of my passions is gathering information from all sorts of electronics books and tutorials. I then take that information and compile it into a language that is super easy to understand. My goal is to make those complex electronics circuit concepts and technical terms much more accessible for all the new and budding electronics engineers out there. I can also design customized circuit diagrams as required by the users.
If you have any questions related to this field, please do not hesitate to drop a comment! I am always here and ready to help you out with any queries you might have. I cannot wait to hear from you!

Reader Interactions

Comments

  1. mosir says

    November 29, 2024 at 7:22 am

    how set 5 minutes?

    Reply
    • admin says

      December 1, 2024 at 10:57 am

      Adjust the R1, C1 values to change the timing to the desired levels…

      Reply
  2. Gelu says

    March 12, 2024 at 12:04 pm

    Hello sir. Congratulations on what you do. I want a timer scheme that repeats the cycle nonstop. For example, to engage a relay for 1 minute and stop for 5 minutes, the cycle to repeat over and over as long as the supply voltage is present. I want this scheme for supplying pellets to a home made heating plant. Thanks.

    Reply
    • admin says

      March 14, 2024 at 8:52 am

      Hello Gelu,
      You can try the following circuit:

      homemade-circuits.com/how-to-make-simple-programmable-timer/

      Reply
  3. Saw says

    October 24, 2023 at 5:53 pm

    This circuit needs 1 and 2 joined to 5-6-8-9-12-13

    Reply
    • admin says

      November 2, 2023 at 9:41 am

      Yes, that’s right, otherwise the transistor base will be grounded…

      Reply
  4. aashutosh kumar says

    August 11, 2023 at 5:32 pm

    How do i set the desired time between 1to 60 minutes

    Reply
    • admin says

      August 13, 2023 at 11:28 am

      Resistor R1 and capacitor C1 create the long time required…

      Reply

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