We are selling several types of digital objects counters. Please check all those also.

About TM1637 and ESP32C3 based digital objects counter:

This is a compact, Wi-Fi enabled 4-digit digital object counter built around the ESP32-C3 microcontroller and a TM1637 4-digit LED display. It is designed for accurately counting objects using a laser beam and photoresistor (LDR), while also offering manual counting and browser-based control.

The counter is lightweight, easy to use, and ideal for production lines, packaging, laboratories, educational projects, and general object counting applications.

How It Works

A <1 mW laser module is directed at the LDR (Light Dependent Resistor) mounted on the side of the counter. Whenever an object interrupts the laser beam, the counter automatically increments or decrements the count, depending on the selected operating mode.

The LDR sensitivity can be calibrated to suit different room lighting conditions, ensuring reliable operation.

Features:

Automatic Object Counting

• Counts objects whenever the laser beam is interrupted.
• Uses an LDR (Light Dependent Resistor) as the optical sensor.
• Suitable for both indoor and controlled lighting environments.

UP Count and DOWN Count Modes

Choose how the counter behaves:

UP Count Mode: Counts upward (0, 1, 2, 3...).

DOWN Count Mode: Counts downward from a preset value (e.g. 3, 2, 1, 0...).

Manual Counting

Three buttons are provided on the top of the unit:

UP – Increase the count.

DOWN – Decrease the count.

RESET – Reset the counter.

For rapid adjustment, press and hold the UP or DOWN button for approximately 3 seconds to enable fast counting.

Browser-Based Control

The built-in ESP32-C3 creates a browser-based user interface, allowing users to:

- Increase or decrease the count remotely.

- Reset the counter.

- Enter any desired count value directly.

- Select UP Count or DOWN Count mode.

- Enable or disable the LDR sensor.

- Calibrate the LDR.

- Access all counter functions from a phone, tablet, or computer.

- LDR Calibration:

Lighting conditions vary from room to room. If the photoresistor does not respond correctly to laser interruptions, simply press the Calibrate button in the browser interface. The counter will automatically adjust its sensing threshold for the current ambient lighting.

Calibration is optional and only needs to be performed when necessary.

Disable the LDR Sensor:

If you only want to use the device as a manual digital counter, the LDR function can be disabled. When disabled, interruptions to the laser beam are ignored, and counting is performed only using the buttons or the browser interface.

Memory Function

The counter automatically saves the current count value in non-volatile memory.

For example:

Current count: 2345

Power is switched OFF.

When powered ON again, the display will still show 2345. There is no need to reset or re-enter the count after a power outage.

Dimensions: 10.5cmx5.6cmx1.9cm

Weight: 90gm

Power Supply

Operating Voltage: 5 V 1A DC- Use your phone charger

USB-C power input: Can be powered using any standard 5 V USB phone charger or power bank.

Key Features:

- 4-digit TM1637 LED display

- ESP32-C3 microcontroller

- Wi-Fi browser-based control

- Automatic laser/LDR object detection

- UP Count and DOWN Count modes

- Manual count buttons

- Fast count adjustment

- Adjustable LDR calibration

- Optional LDR disable mode

- Non-volatile memory (retains count after power loss)

- USB-C powered (5 V)

- Lightweight and portable

- Optional wireless transmitter for large remote displays- To be purchased separately

Package Includes:

1 x Counter module with 3D printed enclosure

1 x Laser module with 3D printed enclosure

Smart phone is not included. Works with all the phone, computer or tablet, ipad. There is no app installation required. You connect your phone to counter's WiFi and go to any web browser, type 192.168.4.1, you will see the user interface, then, you can operate the counter.

About 3D printed enclosure:

Small layer lines, marks and glue marks are normal characteristics of a 3D printed enclosure. It is not intended to compete with an injection-moulded enclosure in cosmetic perfection; instead, it is designed to work well, hold the electronics circuitry securely and give your project a professional finished appearance.

Customization is available. Please contact us before ordering if you require modifications.