DO NOT USE THE 3.3V PIN WHEN USING CLONE NANO!
You ask why? Because there is no 3.3v regulator on the Clone Arduino Nano. The place I marked with 1 in the picture is Ams1117 5.0 ie 5V regulator. So where did they connect the 3.3v pin of the Nano? When you examine the circuit diagram of the 2 numbers clone nano, you will see that this pin is connected to the V3 pin of the CH340 usb serial IC. It’s a cunning to escape the material and see 3.3v when measured with a multimeter. You ask why? Looking at the CH340’s datasheet (picture 3), the V3 pin is not an output pin, but a comparison or reference pin. A pin that specifies at what voltage level the IC will operate. If you are going to work with 5V, connect a capacitor, if you are going to work with 3.3v, connect it to VCC, it says in the datasheet. So what happens when you want to use the 3.3v pin of the clone nano? The CH340 IC is broken and when you try to install you get an error like this: avrdude: stk500_recv(): programmer is not responding
As a result, don’t use the 3.3v pin if you don’t want your clone nano’s ch340 chip to break. In some cases, while the ch340 IC breaks down, unfortunately it takes the Atmega328p IC with it, so it’s a festival. Nano is completely garbage.
