• Skip to main content
  • Skip to primary sidebar

Homemade Circuit Projects

Get free circuit help 24/7

Circuits for Beginners | Basic Circuits | LED Driver | Hobby Circuits | Transistor Circuits

New-Projects | Privacy Policy | About us | Contact | Disclaimer | Copyright

Home » 4017 IC Circuits » Switching OFF Lights in a Periodic Sequence

Switching OFF Lights in a Periodic Sequence

Last Updated on July 6, 2019 by Swagatam 6 Comments

The post explains a circuit that will switch off a group of lamps in sequence with a predetermined delay rate, as set by the user through a built in pot. The ideas was requested by Mr. Azam Jamal

 Technical Specifications

I want to make a circuit which works like: I have 9nos 25 watt CFL bulbs and I want that when I switch off the first bulb then after each 5 minutes the remaining light would switch off regularly like each should go off after 5 minutes of other means that in 45 minutes all 9 lights go off respectively.

Please help me ?

The Design

The circuit functioning can be understood as follows:

The first circuit below which is a simple IC 555 and IC 4017 lamp chaser produces the basic sequencing of the lamps at the rate of 5 minutes, the time frequency being determined by the 100k pot setting.

It must be set to produce a frequency that may be 50% of the desired sequencing rate, meaning here it must be set to produce the ON and OFf periods at the rate of 2.5 minutes.

The second circuit is a simple a SCR based relay driver circuit which needs to be repeated 9 times across the intended outputs of the 4017 IC.

As per the request as long as the SPDT is toggled toward the ground position, the IC555 stays disabled and the first lamp(1) is held switched ON indefinitely.

Also in this position, all pinouts of the IC 4017 from pin2 onwards is locked at zero voltage, which means that the connected SCR relay drivers have their relays in their N/C positions making sure that all the connected lamps stay switched ON.

So all the nine lamps from pin2 to pin11 of the IC 4017 is now in an activated position along with lamp1 associated with the SPDT transistor relay driver stage.

At the desired period when the SPDT is toggled, the first lamp(1) is switched OFF and the 555 timer circuit is initiated with its counting process.

After 5 minutes the 555 IC inputs its first legit pulse to pin14 of the 4017 making pin2 to go high which in turn latches the relevant SCR relay driver switching off the first lamp in the sequence.

After another 5 minutes pin4 goes high switching OFF the associated SCR relay driver lamp, and the process repeats until the last pin11 in the sequence gets activated, switching off the last lamp in the sequence, and this also locks pin4 of the IC555 freezing the whole circuit until the operations are reset by the user for restarting the cycle afresh.

Circuit Diagram

The Relay Driver Stage

You'll also like:

  • 1.  LED Meteor Shower, Rain Tube Circuit
  • 2.  How to Make a Cheap LED Name Plate with Illuminated Back Light
  • 3.  Remote Controlled Solar Lamp Intensity Controller Circuit
  • 4.  220V Dual Alternate Lamp Flasher Circuit
  • 5.  Synchronized 4kva Stackable Inverter
  • 6.  Arduino Random RGB Light Generator Circuit

About Swagatam

I am an electronic engineer (dipIETE ), hobbyist, inventor, schematic/PCB designer, manufacturer. I am also the founder of the website: https://www.homemade-circuits.com/, where I love sharing my innovative circuit ideas and tutorials.
If you have any circuit related query, you may interact through comments, I'll be most happy to help!

Subscribe2


 

Reader Interactions

Comments

    Your Comments are too Valuable! But please see that they are related to the above article, and are not off-topic! Cancel reply

    Your email address will not be published. Required fields are marked *

  1. Henrik Lauridsen says

    Hi Swagatam,

    Thank you very much for all your great schematics and explanations.
    Your circuit Switching OFF Lights in a Periodic Sequence makes me think that maybe a modified version of this circuit could help me producing a living house circuit.
    I would like a circuit that turns on / off outputs in a random order. Simulating a living house or an office building where the light goes on/off in different rooms. Each output in random order if possible. Eg. Room 1 could stay on while 2 turns off etc.
    The circuit is for my model railroad track.
    The circuit should auto reset when all outputs has been raised.
    I hope you can understand what I mean.

    Thank you very much in advance,
    Henrik Lauridsen, Denmark

    Reply
    • Swagatam says

      Hi Henrik, thanks,

      There's even a simpler alternative of implementing the required application..
      You can use a 4060 timer IC in its standard form and out of its 10 outputs select the desired ones as per your liking and configure these with a transistor relay driver stage.

      The selected outputs will provide a random set of ON/OFF switching to the connected lamps.

      you can vary the timing of the lamp ON/OFF through a pot and also try other outputs for varying the randomness of the switching.

      You can find plenty of simple 4060 timer circuits online, or even through this blog.

      Reply
  2. Henrik Lauridsen says

    Hi Swagatam,

    Thank you very much for your reply.
    I am fairly new in building electronics so please forgive me if I ask stupid questions.

    Is it possible to hold more outputs high on the 4060 IC at the same time?
    If not could I with a transistor relay driver hold it high with a capacitor?
    I want to connect LED’s to the outputs and have more of them lit at the same time in random order.

    I see that pin 7 is the first output and pin 5 the second and that output 5 generates exact the double time period of pin 7 from your Simple Timer Circuit Using IC 4060.
    Does that mean if output 7 is held high for 1 second. Output 5 is held high for 2 seconds or is it the time period before the output goes high?

    By the way did you get my question about detecting a model train locomotive? I was so foolish to ask you through Google Hangout which I never use. Can I post my question here or by email?

    Again thank you very much for helping us newbies.

    Reply
    • Swagatam says

      Hi Henrik,

      Yes it's possible to get a high on several pins at a time, and yes it's also correct that from pin7 onwards upto pin3 sequentially generate a 2X time interval that is twice the time interval of the preceding one or 1/2 the frequency of the previous pinout.

      I did not yet see your question in the hangout if possible I'll check it out.

      Reply
  3. Henrik Lauridsen says

    Hi Swagatam,
    Thank you for your reply.

    I am sorry to bother you again, but I have no clue how to hold more outputs high. I have tried to study other circuits using a 4060 IC, but they are mostly timer circuits and only with 1 output high at a time.

    What I would like to achieve after connecting the circuit to 12V DC.
    The circuit should turn on the outputs randomly where more outputs could stay high for a time period and then turn off. When the circuit has completed all outputs it should do a reset to start all over.

    Would you be so kind to help me out here? I would be very grateful for your help.
    Thank you in advance.

    I will send you the question from Hangout to your email.

    Reply
    • Swagatam says

      Hi Henrik,

      You can use pin1/2/3 of the IC for achieving simultaneous switch ON of the loads for some period of time, for example, if pin3 is set to be ON for 8minutes, pin2 will be ON for 4minutes and pin1 for 2 minutes…meaning for 2minutes all the three lamps across these outputs will ON together, or for 4 minutes at least 2 lamps will be ON….if you use other subsequent pins, then you may get at least 5 lamps simultaneously ON for at least 1mnute or 6 lamps ON for at least 30 seconds and so on….

      Reply

Primary Sidebar

Categories

  • 3-Phase Power (15)
  • 324 IC Circuits (19)
  • 4017 IC Circuits (53)
  • 4060 IC Circuits (25)
  • 555 IC Circuits (98)
  • 741 IC Circuits (19)
  • Amplifiers (58)
  • Arduino Engineering Projects (82)
  • Audio Projects (94)
  • Battery Chargers (82)
  • Car and Motorcycle (94)
  • Datasheets (46)
  • Decorative Lighting (Diwali, Christmas) (33)
  • DIY LED Projects (89)
  • Electronic Components (97)
  • Electronic Devices and Circuit Theory (35)
  • Electronics Tutorial (109)
  • Fish Aquarium (5)
  • Free Energy (35)
  • Fun Projects (11)
  • GSM Projects (9)
  • Health Related (18)
  • Heater Controllers (28)
  • Home Electrical Circuits (101)
  • How to Articles (20)
  • Incubator Related (6)
  • Industrial Electronics (28)
  • Infrared (IR) (40)
  • Inverter Circuits (98)
  • Laser Projects (12)
  • LM317/LM338 (21)
  • LM3915 IC (25)
  • Meters and Testers (63)
  • Mini Projects (171)
  • Motor Controller (66)
  • MPPT (7)
  • Oscillator Circuits (24)
  • PIR (Passive Infrared) (8)
  • Power Electronics (33)
  • Power Supply Circuits (74)
  • Radio Circuits (9)
  • Remote Control (47)
  • Security and Alarm (61)
  • Sensors and Detectors (116)
  • SG3525 IC (5)
  • Simple Circuits (74)
  • SMPS (29)
  • Solar Controllers (61)
  • Timer and Delay Relay (54)
  • TL494 IC (5)
  • Transformerless Power Supply (8)
  • Transmitter Circuits (40)
  • Ultrasonic Projects (14)
  • Water Level Controller (45)

Circuit Calculators

  • AWG to Millimeter Converter
  • Battery Back up Time Calculator
  • Capacitance Reactance Calculator
  • IC 555 Astable Calculator
  • IC 555 Monostable Calculator
  • Inductance Calculator
  • LC Resonance Calculator
  • LM317, LM338, LM396 Calculator
  • Ohm’s Law Calculator
  • Phase Angle Phase Shift Calculator
  • Power Factor (PF) Calculator
  • Reactance Calculator
  • Small Signal Transistor(BJT) and Diode Quick Datasheet
  • Transistor Astable Calculator
  • Transistor base Resistor Calculator
  • Voltage Divider Calculator
  • Wire Current Calculator
  • Zener Diode Calculator

Facebook
Twitter
YouTube
Instagram
My Facebook-Page
Quora

© 2022 · Swagatam Innovations

We use cookies on our website to give you the best experience.
Cookie settingsAccept All
Privacy & Cookies Policy

Privacy Overview

This website uses cookies to improve your experience while you navigate through the website. Please visit the Privacy Policy Page for more info.
Necessary
Always Enabled
Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information.
Non-necessary
Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. It is mandatory to procure user consent prior to running these cookies on your website.
SAVE & ACCEPT