PolyU EIE3105 / EIE3106 (2022-2023) EIE JoyPad & MCU Control PCBs - Important Note (Robot Car) - Integrated Project
PolyU EIE3105 / EIE3106 Real PCB Photos 2022/2023 S1 to S2 - Integrated Project - Important Note * ( 15 Mar 2023 ) ----- ----- * Important Note * ----- ----- Some students reported failure on MCU or USB port burnt in short circuits (pins among 3.3V and GND). Possible damage causes: 1) The capacitor of C2 on the Blue-Pill MCU adaptor board is too small. It should be 100 uF or larger (recommended to use 220 uF, 10V) 2) Short circuit occured because of bad soldering or wrong connections. Please check your regulator outputs Vcc. It should be 3.3 V. Is it 3.3 V? Many students reported that the Vcc is 6V to 7V from the 3.3V regulator because it has been burnt due to short circuit. Please don't keep asking for new blue pill MCU board if you haven't checked the Vcc voltage!!! We have purchased many pieces of new AMS1117-3.3V. 3) The two 3.3V power were turned ON with: a) Battery power is turned ON to have a regulator to provide 3.3V AND b) USB port is connected to USB dongle to gene