| Electronics > Beginners |
| Comments about this simple circuit that is teach in a university...... |
| (1/4) > >> |
| 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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