Digital object counter DIY kit

We are now selling CD4026 and CD4029 up and down counter modules.

This kit is based on my previous tutorial on ‘digital object counter‘. I had published the tutorial under ‘minibread’ category. Please check the tutorial. 

IMG_0673
Digital object counter

In that tutorial, you can see that there is only one seven segment display and there is no reset switch. Well, that was extremely basic circuit.

What’s new?

Digital object counter

My new DIY digital object counter works with TSOP4838 infrared receiver   and there are two seven segment displays displaying numbers from 0 to 99.   An IR transmitter is oriented towards the TSOP4838 infrared receiver of counter module and objects are moved between the counter and transmitter modules. Each time an object passes between the two modules, the seven segment displays show increment in numbers. The counter module can be reset to 0 at any time and restart the counting.

Watch the video below:

The counter can be reset to 0 by pressing the reset switch(see on video). The counter stops counting if the IR rays is continuously falling on the IR sensor. As soon as an object obstructs the IR signal, the counter immediately counts the interruption.

The distance between the counter module and the IR transmitter should be around 1 meter.

The module can also be tested with general remote control. Thus, you can also call it as a simple remote tester. For each press on your remote control, there is increment in number.

Power supply: The counter works with a 9V battery and the IR transmitter works from 6V to 9V.

Counter operating with a remote control:

Schematic of counter module:

Counter

When TSOP4838 infrared receiver receives infrared signal, it triggers BC557 and switches on LED2. This trigger also charges the RC circuit network made up of C1(100uF), R3(1K) and R4(1K) and switches on the transistor BC547 for a few seconds. Transistor Q1 switches on the LED1 and gives clock signal to IC1(CD4026). For each clock, CD4026 drives the seven segment display and increases the numbers on the display.

Pin number 5 of IC1 is connected to pin 1 of IC2 for chaining the two CD4026 chips. For adding one more digit, the pin 5 of IC2 should be connected to pin 1 of IC3.

Schematic of IR transmitter module:

IR transmitter schematic

GO TO IR TRANSMITTER ASSEMBLY INSTRUCTIONS PAGE

IR transmitter is based on astable mode of 555 timer. The 555 timer, resistors and capacitor on the transmitter module output IR rays at 37.974Khz(approximately 38Khz). The TSOP4838 infrared module operates at 38KHz infrared frequency, however, that is not so strict with these kinds of basic experiments. It actually operates at frequencies between 30Khz to 40Khz.

Use astable mode frequency calculator for finding out the frequency of 555 timer. While using the online calculator, enter R1=18K, R2=10K and C1= 0.001uF, you will get 37.974 KHz.

How to use the kit

Place the two kits facing each other in a straight line. The IR receiver(on the counter module) and the IR LED(on the transmitter module) can be kept in a line of sight(straight line). When you move an object in between the two kits, the counter module counts the number of interruptions in the line of sight.

Behavior 1: When you place the IR receiver and the IR LED in a straight line, the two 3mm LEDs on the counter module are switched on and it counts as soon as there is an object in the line of sight.

Object counter

Behavior 2: When you place the IR receiver and the IR LED close to each other but not in a straight line, the two 3mm LEDs on the counter module are switched off and the counter counts as soon as an object moves away from the line of sight.

Slide2

Please watch the following video to be more clear:

Other related tutorials:


  • 3 Digit Digital Object Counter ASSEMBLED Kit With Infrared Transmitter And Laser Module

    US $14.95
    12 items sold

    3 Digit Digital Object Counter ASSEMBLED Kit With Infrared Transmitter And Laser Module

    US $14.95
    12 items sold

    This is 3 digits digital object counter kit for electronics beginners and hobbyists. It is the upgraded version of our previous 2 digits and 3 digits object counter.

    You can use this 3 digits digital object counter for counting objects or people entering in a room. It can be used by engineers for learning about digital counters.

    This DIY digital object counter works with VS1838 infrared receiver and photoresistor and there are three seven segment displays displaying numbers from 0 to 999. An IR transmitter is directed towards the VS1838 infrared receiver of the counter module and objects are moved between the two modules. Each time an object passes between the two modules, the seven-segment displays show increment in numbers from 0 to 999.

    45 in stock

    Add to cart
    Quick View

Check out all the counters

  • 1.8″ Photoresistor And Laser Operated Medium Digital Objects Counter

    US $19.95
    13 items sold

    1.8″ Photoresistor And Laser Operated Medium Digital Objects Counter

    US $19.95
    13 items sold

    This is an upgraded version of the previous digital objects counter kit. The device has 1.8″ common cathode seven segment displays.

    The kit is based on the CD4026 decade counter.

    4 in stock

    Add to cart
    Quick View
  • 2.3″ Common Anode Seven Segment Display Driver

    US $13.95
    8 items sold

    2.3″ Common Anode Seven Segment Display Driver

    US $13.95
    8 items sold

    This is a 74LS192 based up and down counter driver module for driving 2.3 inches seven segment display. The module has headers on two sides to receive up/down count signals and to concatenate with another driver module.

    The module can be triggered with NE555, flashing LED, and Arduino. It can also be triggered by anything that generates a clock pulse.

    10 in stock

    Add to cart
    Quick View
  • 2.3″ common cathode seven segment display driver

    US $11.95US $12.95
    22 items sold

    2.3″ common cathode seven segment display driver

    US $11.95US $12.95
    22 items sold

    This is a CD4026 based up counter driver module for driving 2.3 inches common cathode seven segment display. The module has headers on two sides to receive up count signals and to concatenate with another driver module.

    The module can be triggered with NE555, flashing LED, and Arduino. It can also be triggered by anything that generates a clock pulse.

    Clear
    Select options
    Quick View
  • CD4026- 1 Digit Up Counter Module

    US $4.95
    65 items sold

    CD4026- 1 Digit Up Counter Module

    US $4.95
    65 items sold
    • It works as an UP counter. You can instantly test the up count of the display using a flashing LED.
    • It is a handy tester for 0.56″ seven segments common cathode display.
    • Works with Arduino or NE55 or whatever that gives pulse.
    • You can concatenate as many displays as you want.
    • With this, you can build your own digital objects counter.
    • Size: 15mmx49mm

    50 in stock

    Add to cart
    Quick View
  • CD4029 Based Up And Down Counter For Arduino And NE555

    US $7.95
    21 items sold

    CD4029 Based Up And Down Counter For Arduino And NE555

    US $7.95
    21 items sold

    50 in stock

    Add to cart
    Quick View
  • Photoresistor And Laser Operated Large Digital Objects Counter With 2.3″ Displays

    US $29.95
    9 items sold

    Photoresistor And Laser Operated Large Digital Objects Counter With 2.3″ Displays

    US $29.95
    9 items sold

    A laser light module illuminates the photoresistor continuously and whenever any object obstructs the laser light falling on the photoresistor, the counter increases the count. You can use this 3 digit digital objects counter for counting objects or people entering a room. It can be used by engineers for learning about digital counters.

    4 in stock

    Add to cart
    Quick View

Share This

9 thoughts on “Digital object counter DIY kit

  1. thats cool, can you help me, i have a coin operated pc..and i want to have a digital coin counter inside the box, it has a sensor facing each other once there is an interruption it will trigger the relay to close and thats it, it will give a time for the user…how can i connect a counter on its existing sensor so that i dont have to build another sensor for the counter…thanks

  2. Very interested in this product. However, I need the digits to be displayed about 1m away from where the IR sensors would be located. Is this possible, how could you kit be modified to accommodate this
    Ryan

Leave a Reply

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

This site uses Akismet to reduce spam. Learn how your comment data is processed.

0
    0
    Your Cart
    Your cart is emptyReturn to Shop
    Send this to a friend