Arduino project · Displays and counters · Medium
Production Line Product Counter
An IR sensor counts products on a conveyor. After 10 the counter restarts and a buzzer sounds.
What you will learn
- How factory counters work
- How a counter wraps at the box size
- Why we wait for the sensor to clear
How it works
Each product adds one. After the tenth the number goes back to 0 and the buzzer sounds until the next item.
Try this next
- Add a servo that switches the box.
- Add a second box counter.
- Log the total on an SD card.
The simulator program and explanation on this page are original. The idea follows a classic Arduino project that students have built for years.
Parts: sensors and actuators (tap to show or hide)
Try the inputs (virtual sensors)
Pins (you can change them)
| Part | Arduino pin (change it here) | How to wire it |
|---|
Every wire, one by one
Red rail = 5 V from the Arduino 5V pin. Black rail = GND. The coloured wires carry signals. Match the wire colours on the drawing to this list.
| # | Colour | From (part and leg) | To |
|---|
Steps run from top to bottom, then start again. While the simulation runs, the active step is highlighted in green.
Quantities come from the parts you added. The store links open a search for that item on Robu.in, Amazon.in and ThinkRobotics, so you always see what is in stock today. Check the model, voltage and price before you order.
| # | Item | Qty | Search term | Buy / compare |
|---|
The PDF has the circuit sketch, pin table, every wire, sequence, full code, the parts list with store links, do’s and don’ts for each part, and the safety notes. The project file lets you come back and keep editing.
In the real world
A factory conveyor counter
Each box that passes the sensor adds one to the count.
Tip: use the gold tab at the bottom of the circuit drawing to pull the real-world view up over the Arduino board. Your parts stay visible above it, so you can press a button and watch the real scene react.
- IR sensor = a box passing
- Buzzer = batch finished