The digital object counter is a cost-effective and simple system. It overcomes the problem of manually counting objects. Everything is digital, so the signals can be used for further analysis and is compatible with other digital devices. If this system is implemented, a halt in product counting can be achieved. In addition, there are no hazardous elements used in the circuits and therefore, it can be used even in hazardous atmospheres in an industrial area. The logic is very simple, the circuit has sensor TSOP1738 that detects whether there is an object or not in front of it. The microcontroller will take the input of the STOP1738 sensor, process it and send the output to the LCD display unit which will show the number of counted products.
The TSOP1738 is an IR detection device, which detects the IR rays transmitted at 38kHz frequency (it is the transmission frequency not the frequency of the IR rays). Its output is not affected by the surrounding lights; Therefore, you will only perceive the object. To transmit the IR rays at 38 kHz the 555 IC astable multivibrator mode is used. The output of the sensor is processed by a microcontroller. After processing, the output signal from the controller is fed to the LCD screen that shows the output.