Electronics > Beginners
Comments about this simple circuit that is teach in a university......
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wilmer:
 :-DD what is going to happen with the MCU.....
.....Because you can code an Arduino doesn't mean that you now are an electronic engineer.
That lovely diode that replace a resistor

Zero999:
What will happen to the MCU? In reality, it's internal resistance might limit the current to a safe level, especially if it's run off a 3V supply.

I agree, this is of course not the way it should be done. The transistor will also take a long time to switch off.
wilmer:
The
--- Quote from: Hero999 on June 12, 2018, 09:59:43 am ---What will happen to the MCU? In reality, it's internal resistance might limit the current to a safe level, especially if it's run off a 3V supply.

I agree, this is of course not the way it should be done. The transistor will also take a long time to switch off.

--- End quote ---

MCU=ATmega328P
Voltage of the MCU= 5V
 |O
The I/O port don't have a resistance in series for the port. That MCU is a hero to support that, a PIC 16XX will blow immediately.
Tom45:
Is it being taught as an example of what not to do?
wilmer:

--- Quote from: Tom45 on June 12, 2018, 10:41:34 am ---Is it being taught as an example of what not to do?

--- End quote ---
No.....is the example of what to do...... :'(
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