PCOMP-WEEK 1
- A journey to locate errors

Question 1:

The Nano is connected to a 3.3 Voltage and a 7-12 Voltage. Then which pin is powered 3.3V, which pin is powered 7-12V?

Nothing worked.

I want to figure out what is wrong.

So, I make a circuit with only one switch. Nothing works either. Is the switch broken?

To find the answer, I make a circuit without a switch. No light. No. So, shouldn't blame the switch.

Is something wrong with the power supply? I replace the Nano with an Uno...It turns out that Nano is innocent.

Not surprisingly, not working. Probably it shares the error of project 1

This one works!!

However, only with Uno as the power supply. Obviously, something is wrong with the Nano power...

Even connected to Uno, the led is not on when the switch is closed. But the motor works totally fine.

I replaced the resistor with a wire, the led is on! The value of the resistor is too high. And it makes the led does not seems like working.

The Error was FOUND!