Digital Object Counters

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.

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.

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.

https://youtu.be/VlUlNiikM7c

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 NE555 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.

https://youtu.be/m6a_Ay2Hjjs

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 NE555 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.

https://youtu.be/S9nGeAF2FAM

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

Read about Scoreduino and Scoreduino app

https://youtu.be/p9O3H9j-PQs