5mm audio jack. It is possible to either use the audio jack to attach a headphone or You need to use a buzzer Together with the audio jack switch terminal. An LED is connected to the GPIO2 to indicate the disk read position. Every time the program is busy looking through from the SD card the LED will gentle up. All of the switches are connected to

Using the controllers assembled, another phase involves complete tests and high-quality control actions to make certain Every unit fulfills the exacting benchmarks established forth from the manufacturer.Rigorous tests protocols encompass a various range of assessments, from practical effectiveness to durability less than demanding usage eventualit