Digital Object Counters

SMALL- 3 digits digital object counter DIY learning kit

Works with laser light and infrared

This is the most popular digital object counter. More than 10,000 copies have been sold in 70+ countries since 2012. It is a popular kit among electronics beginners and hobbyists.

You can use this 3 digit 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 3 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.

How does it work ?

  • Each time an object passes between the two modules, the seven segment displays show increment in numbers from 0 to 999.
  • If you are using the laser light, direct it towards the photoresistor and the pointed light should hit the photoresistor so that whenever the light is block, the counter starts counting.

MEDIUM- 1.8 inch display- 3 digits digital object counter

Works with laser light only

This is similar to the basic DIY digital object counter kit. The only difference is the size. It has three 1.8 inch displays. All displays are common cathode.

There are 7 transistors for turning on each of the seven segment displays. It is triggered by laser light.

There is a photoresistor on the counter module and there is a laser light hitting the surface of the photoresistor. Whenever any object or person crosses the laser light beam, the device counts.

LARGE- 2.3 inch display- 3 digits digital object counter

Works with laser light only

This is exact copy of the objects counter with 1.8 inch common cathode displays. The only difference is its size. It has 2.3 inch common cathode seven segment displays.

1 digit 2.3 " common cathode display tester- UP counter

Test your 2.3" common cathode 7-segment display

This is a simple tester or driver for 2.3″ common cathode seven segment displays. Simply place your display on the board and solder it. You can instantly use the top tactile switch to test the count and it counts well without any false triggering.

Key features:

  • Use as a 2.3″ common cathode seven segment display tester.
  • It works as an UP counter. You can instantly test the up count of the display.
  • Works with Arduino or NE55 or whatever that gives pulse.
  • You can concatenate as many drivers as you want.
  • It works with object counter trigger module. You can build a photoresistor or infrared based object counter also.

1 digit up counter module for Arduino users and hobbyists

Build your own object counter on a breadboard

This is a simple up counter module for Arduino users and electronics hobbyists.

Key features:

  • 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 segment common cathode display.
  • Works with Arduino or NE55 or whatever that gives pulse.
  • You can concatenate as many displays as you want.
  • It works with object counter trigger module. You can build a photoresistor or infrared based object counter also.

Trigger module for 2.3" driver and up counter module

Send count pulse using tactile switch, infrared sensor and photoresistor

This is a basic trigger module for 2.3″ seven segment display driver and the basic up counter module designed for Arduino. With this trigger module you can build your own object counter on a breadboard.

It has a switch, an infrared sensor and a photoresistor. The photoresistor works with a laser light. Whenever light falling on the LDR is interrupted, the trigger module sends count pulse to the seven segment display driver. Same principle applies to infrared sensor also. Whenever the infrared ray is interrupted, the infrared sensor sends count pulse to the display driver.

UP and DOWN counter module

CD4029 based up and down counter module for Arduino users

CD4029 is a presettable binary/decade up and down counter chip. Scoreduino app has a feature to control the CD4029 based up and down counter module. You can connect the CD4029 counter module to Arduino and send up and down signals via Bluetooth. It is the most basic and simplest up and down counter for Arduino enthusiasts.

It works with Arduino, NE555 and even a flashing LED.

Documents:

  • Schematic
  • How to connect to Arduino? Fritzing diagram and images.
  • Arduino Sketch
  • CD4029 datasheet

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