The battery is connected to the output from the TP4056 module. From there the availability is connected to a substantial-facet P-Channel MOSFET. By default, the gate of this MOSFET is pulled up to the VBAT amount. Once the compact slide switch is switched to the gate might be linked to the ground and the MOSFET will likely be turned on. This easy c
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5mm audio jack. You can both make use of the audio jack to connect a headphone or You can utilize a buzzer With all the audio jack swap terminal. An LED is linked to the GPIO2 to show the disk study standing. When the program is chaotic studying from the SD card the LED will mild up. All of the switches are linked to varies GPIO pins and the point