2 Digit Object/Product Counter


BySaddam 89

2 Digit Object/Product Counter Circuit

Object counters or product counters are important applications used in industries, shopping malls, etc. They count objects or products automatically and so reduce human efforts. In this tutorial we are going to design a simple object counter circuit without using any microcontroller.



  1. LM358 IC - 1
  2. 555 timer IC -1
  3. Voltage Regulator 7805 -1
  4. 150 Ohm - 2
  5. CD4033 -2
  6. 10K resistor -2
  7. 100K resistor -1
  8. 10K POT -1
  9. 220uF capacitor -1
  10. IR sensors-1
  11. Bread board-1
  12. 9 Volt Battery -1
  13. Battery Connector-1
  14. LED -2


Circuit Diagram and Explanation

Object Counter Circuit Diagram

The circuit diagram of object counter is quite similar to my previous project (digital stopwatch circuit) but a little complex . In this circuit we have used a comparator (IC LM358) and IR transmitter and receiver pair for detecting a object. And then we have used a 555 timer IC to generate a pulse for triggering the seven segment decoder (CD4033) and two common cathode seven segment display units are connected with 7 segment decoder IC. 555 timer IC is configured in mono-stable mode for generating pulse. A LM7805 Voltage regulator is used for providing constant 5 volt power supply for the circuit. And a 9 volt battery used for powering the whole circuit.  



In this circuit we detects object by using IR sensor and comparator and then we applied output of comparator to mono-stable multi-vibrator. This mono-stable multi-vibrator generates a pulse of fix time period which can be set by using given formula.


In this circuit we have selected R1 is 10K and C1

Object Counter Block Diagram

After getting a pulse from 555 timer we applied this to clock pin of 7 segment decoder (U4) and then carry out signal (pin 5) to clock pin of another 7segment decoder (U3). After getting pulse from 555 timer 7 segment counter changes number value of segment display. and when number counting reaches at 10 in U4 decoder then it sends carry out signal or pulse to seconds 7segment decoder (U3) and then second display changes his number value. And this process repeats again. This object counter circuit can count 00-99.


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  • mohsin's picture
    Jan 04, 2016

    hey,what is the maximum distance the two sensors can be kept apart?and is this circuit working properly?

  • Abhishek's picture
    Jan 14, 2016

    Normally the range of IR LED is 2 meter, but it can be increased by using Lens. Video is the proof of its proper working, our all the projects are properly tested.

  • Rahul gondhali's picture
    Rahul gondhali
    Jan 18, 2016

    Hi I want to ask you that how can we add one more seven segment display to increase range upto 999

  • saddam khan's picture
    saddam khan
    Jan 21, 2016

    yes you can add third seven segment for displaying number till 999. you will need one more 4033 ic and a seven segment.

    and connect seven segment to 4033 ic as shown in circuit.
    here you need to connect CO pin of U3 ic to new 4033's clock(clk) pin.

  • kamulegeya sulaiman's picture
    kamulegeya sulaiman
    Feb 03, 2016

    if i cannot find the ic 4033, can i replace it with the ic 4026 and how should i connect
    does the used of the dei instead of the rbi affect the circuit operation

  • nisar's picture
    Mar 20, 2017

    what is dei and rbi???

  • Ankur's picture
    Feb 08, 2016

    yes, connect det as rbi.

  • kamulegeya sulaiman's picture
    kamulegeya sulaiman
    Mar 08, 2016

    it failed towork! with 4026 please help

  • Napster's picture
    Feb 13, 2016

    Is there any coding in the project?

  • Jayant's picture
    Feb 23, 2016

    No, there is no microcontroller, hence no coding.

  • kamulegeya sulaiman's picture
    kamulegeya sulaiman
    Mar 08, 2016

    i assembled the curcuit as the cicuit diagram shows, using two Hcf4026 Ic. no infrared detected and its stuck at 08 on the displays. i really need your help xoz its my project

  • Dez's picture
    Mar 16, 2016

    Could someone please show me how to put this onto a stripboard?

  • Dez's picture
    Mar 20, 2016


  • Abhishek's picture
    Mar 28, 2016

    @Dez: All the circuits on the site are perfectly tested and working.

  • kamulegeya sulaiman's picture
    kamulegeya sulaiman
    Mar 21, 2016

    The infrared sensor worked perfectly. And it counted with one 7 segment using 4026 circuit diagram maddy availed. Thanks
    Will only change the timing of the tripple five for effective counting

  • CHARAN's picture
    Mar 24, 2016

    In which tool i can simulate this above circuit help me out in this as soon as possible

  • Omar Lahiani's picture
    Omar Lahiani
    Apr 24, 2016

    Hi ,
    Thanks for sharing this project , I'm building a project that requires comparing two IR counters , so I was wondering if it is possible to compare two CD4033 outputs through an IC7485 or a similar comparator ? Or if you could suggest another idea of doing so , that would help a lot .Thank you in advance :)

  • Niahat's picture
    May 03, 2016

    hlw bro....i have made this circuit bt without tuch negative wire it dose not work. why this problem face??? please give me salution..

  • aqsa nisar's picture
    aqsa nisar
    May 06, 2016

    My circuit didnt run and pz send proper circuit daigram for beginners

  • Yousuf's picture
    May 07, 2016

    hey this project is awsome, but can we decrement the counter as it is incrementing also if we want to decrement what we will doo pleasee help me i am stuck :(

  • devang's picture
    May 10, 2016

    dis crkt is not working . plz send me the correct circuit ASAP ..as i am fully dependent on ur site for my project and i have to present it on 14th may ..

  • Maddy's picture
    May 17, 2016

    @Niahat @aqsa nisar @ devang: Circuit is correct and working properly, please check your circuit twice and adjust the variable resistors properly.

  • Aakhan's picture
    Dec 04, 2017

    how can i adjust the value ?
    Which resistance value is suitable for it ?
    plz help....

  • Ahan's picture
    May 29, 2016

    I have assembled this circuit, but it is not working properly. The IR receiver/detector pairs are working perfectly and so are the 7 segment displays. But whenever an object passes, the display is does not increment the number. Could you help me out?
    Please respond as soon as possible, because this is for my project and I have no time left.
    Yours sincerely.

  • peter's picture
    Jun 15, 2016

    hey! please tell me the name of that 2 Ics is CD 4026 or not?

  • Petyr's picture
    Jun 20, 2016

    Good day, is there any way that this circuit can also counts down? Can you please show me the circuit how. Thank you.

  • waqas's picture
    Sep 07, 2016

    sir I simulated this circuit diagram in proteous but the problem i,m facing is that it starts counting start from 01 and goes on while i want that it should start from 00 please help i,m waiting for your reply

  • SUBHRA PRATIK's picture
    Sep 14, 2016

    This circuit looks awesome. But I want to decreament the count when an object is taken in opposite direction by adding another it ir sensor. Can u help me with this?

  • mrunali sawant's picture
    mrunali sawant
    Sep 23, 2016

    plzzz send mi full component list

  • ADESH's picture
    Sep 28, 2016

    is there any extra connection in between 4033 and ssd....
    extra resistors are used as shown video....
    plz tell me the full description of ckt diagram..

  • Pratik 's picture
    Sep 28, 2016

    Did you checked components and circuit diagram.
    It seems that your using multiple 10k resistor and see list of components in that 10k resistor are only 2

  • pogi's picture
    Sep 29, 2016

    Is there any specific type of IR receiver? If I am going to buy one, do I just ask for an IR receiver?

  • irf's picture
    Sep 30, 2016

    where should i connect the common pin(3,8) of the seven segment display??

  • ad's picture
    Oct 03, 2016

    not getting output yar...
    plz post the correct ckt diagram....
    is their any one got the solution ...plz post it..
    first part working properly i.e. it sense the object not count them....

  • Cosmin's picture
    Nov 09, 2020

    can u tell me how i can find the pair RX AND TX on proteus, please.i am a beginner

  • Cheeny flor's picture
    Cheeny flor
    Oct 06, 2016

    Can I ask sir if what would be the best replacement of cd 4033 if this circuit is not available? Thank u

  • Ryan's picture
    Oct 09, 2016

    Should I use a photodiode or a phototransistor?

  • Cheeny flor's picture
    Cheeny flor
    Oct 10, 2016

    Can I still used the diagram even if my ic is 4026?

  • Wakee's picture
    Oct 14, 2016

    Sir what if I wanna put a switch that would set the count back to 00. What pin should I place it?

  • Abhishek's picture
    Oct 15, 2016

    Make Pin no 15 (MR) High to reset the Seven segment to 0.

  • Ryan's picture
    Oct 19, 2016

    Why is the LED on ON when no object is in front and goes OFF when an object passes by? Isn't the LED suppose to light only if the photodiode activates from the bounced IR (when an obstacle is present)?

  • Mark Panganiban's picture
    Mark Panganiban
    Oct 24, 2016

    What can i use to replace CD4033 for this circuit?
    Can I still use this circuit if I used that replacement instead of the CD4033?

  • Maddy's picture
    Oct 27, 2016

    Please check all the comments above before asking, your question might have answered already.

  • Mark's picture
    Oct 30, 2016

    Does the infrared pair need to be close to each other?

  • Ebramshah's picture
    Nov 14, 2016

    Hi sir,
    Would I be able to get the codes for this circuit?

  • Abhishek's picture
    Dec 01, 2016

    There is no micro controller has been used so no Code is there.

  • Yi Jia's picture
    Yi Jia
    Nov 15, 2016

    Hi I wanna ask is it possible that the IR sensor can detect black and white colour? Cause my project is doing black colour for player 1 and white colour for player 2 and if IR sensor detect black colour add 1 mark for player 1 and vice versa.

  • vedant's picture
    Oct 14, 2017

    can u give me u r contact detail. i have problem in these circuit. the circuit diagram and circuit on bread board are different.

  • Ahmad Ali's picture
    Ahmad Ali
    Dec 05, 2016

    Hello... I want a help... I want to apply this project on PCB... Can you give me the PCB circuit diagram of this circuit... I really need help... I'll be grateful to you

  • Nael Kilani's picture
    Nael Kilani
    Dec 11, 2016

    Can u tell me plz the value of Pot ?

  • Mhel's picture
    Dec 25, 2016

    Hi this circuit can add down counting or up and down counter thanks

  • Sebastian's picture
    Dec 27, 2016

    can we use 4017 in place of 4033

  • Ahmad's picture
    Jan 01, 2017

    can i use IR transmitter and receiver in front of each other as I want to make a tachometer.

  • kishor's picture
    Jan 08, 2017

    Please help
    For this ckt using microcontroller with LCD interface .output of ic555 conected to the microcontroller then what happen ?
    It can work properly ?
    Please reply

  • sepide's picture
    Mar 07, 2017

    hi i ask a question did project has code or not?

  • Shreya 's picture
    Mar 08, 2017

    I am doing this project on PCB bt the routing process finishes only till 95 %, i connot proceed further help me out

  • Sheeba kondeti's picture
    Sheeba kondeti
    Mar 12, 2017

    As cd4033 isn't available in the market can you please suggest a replacement.

  • kns's picture
    Mar 17, 2017

    we only get common anode 7 segment displays (and IC 9447 decoder). Can u tell me the changes to the circuit?

  • Michael's picture
    Mar 21, 2017


    After looking at the circuit, what is the need for the 100K resistor which connects the MR and the INH to ground? Can't seem to work this out.


  • DEEPESH PUNJWANI.'s picture
    Mar 26, 2017

    How can we add a reset button to reset the circuit. and can we convert the circuit into a bi-directional counter??
    Revert back ASAP

  • Psdmech's picture
    Apr 02, 2017

    is this circuit really works? is this circuit is simulated and tested

  • nisar's picture
    Apr 04, 2017

    do we need to give supply to the 7 segment display where ???
    and also what to do with cc connection in the display

  • DEV RATHORE ]'s picture
    Apr 06, 2017

    sir .
    if object 1st is detected bye the sensor than diaplay on the segment will be it count by 0--to---1
    lets this object again come in reverse direction than what will be the count. Is it bye 1--to--0 ?????

  • Arsalan's picture
    May 17, 2017

    i dont know how are these 7 segment display are connected ...

  • ward hafez's picture
    ward hafez
    May 19, 2017

    hi, thanks for sharing
    if i wanted to reset the count to zero, what should i do??
    ps: the reset signal is from a 60-seconds timer circuit

    many thanks

  • Rishabh's picture
    Aug 22, 2017

    Hello sir i am making this circuit for my project. The circuit in the video seems to be different from the proteus circuit diagram. I have implemented it and my ir sensor is working too. But the count value on 7 segment does not change from 00 please help me.

  • Aljon's picture
    Oct 13, 2017

    Hi guys. I dont know if you will reply but i really need your help. The circuit is all working and the output display is incrementing but not in proper way. My output doesnt show 00-99 instead it shows any number. It counts normally when it detects an object but it also counts when I releases the object. Hope you will reply

  • Chandrasekhar 's picture
    Nov 25, 2017

    insted of 4033 ic, what ic I may use in this ckt

  • Rushikesh Chikhale's picture
    Rushikesh Chikhale
    Jan 27, 2018

    Hey i properly build the circuit but counting is no no increment

  • ashiq's picture
    Feb 14, 2018

    is there any component in circuit that has been grounded ,,,please tell which component or resistor or any....etc................................then whats the need of 10k pot ,wheres it in the circuit

  • Derpetitto's picture
    Apr 02, 2018

    How will you add a reset function? Thanks

  • Nky's picture
    Apr 05, 2018

    How i make digital clock via seven segment .....

  • mazamen's picture
    May 06, 2018

    how to make 0 to 15 down counter project...???

  • hardwareman's picture
    May 09, 2018

    This is awesome! Is there a circuit diagram for the numbers to count up and down without using a microcontroller or arduino. Plz replay ASAP.

  • rehan's picture
    May 28, 2018

    i have a problem Please help!!!
    all lights are on of my 7 segment.....
    it is not counting object!

  • Syammil Salahuddin's picture
    Syammil Salahuddin
    May 29, 2018

    Hey, may i ask questions? Why my ir sensor nit function while construct at breadboard?

  • DRUMZ's picture
    Jun 06, 2018

    it doesnt work

  • Cosmin's picture
    Nov 09, 2020

    Hi,how i can find the pair IR TX and IR RX on proteus and I am a beginner btw

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