I just clamped a 4 pin fan to the arduino - so far only a bit slow. After a short search, I found a 19.5V power supply from the laptop and would just put the 19.5v on the 12v pin (I'm aware that the vil is out but 18V he has managed) - but I use the GND of the arduino and no longer the minus pole of a battery I'm not sure if I scrape the less expendable arduino with it
(Unfortunately, I'm a rivet in electrical engineering and I would also like to receive detailed answers
lg kavc
[improvised picture]
FAN cable black -> arduino GND
FAN cable red -> 19.5v power supply
FAN kael blue -> arduino pin 6
FAN cable yellow -> breadboard C1
breadboard B1 -> 10k ohms resistance -> arduino 5V
breadboard A1 -> arduino pin 2
At the ground pin, the voltage is 0V as the 19.5V drops off the fan. However, you should keep in mind that the pins of the Arduino are not all designed for higher currents. And with "higher" I mean currents> 50 mA, which you have reached quickly with a fan.
Why do you even need the Arduino? For speed control?
The GND of Arduino and external power supply must then connect. But do not connect the positive pole with the plus of the Arduino, only to the fan!
Unfortunately I did not quite understand that with ampere yet. So comes at the GND still ampere? Or do you mean the other pins as 2,3,4 etc?
I have to be able to control the speed reasonably well because I want to supply a coal to eat with air wanted to try forging
unfortunately have no raspberry for
How do I do that. Simply the (normally) black cable to one of the two GND pins (the under 3,3 and 5V)?
To any GND. Preferably right at the fan connector.
Oh true xD completely forgot that nothing further between gnd and fan is
You lose tension over the fan, but the current flows through the entire circuit, from the + to the - pole, and your Arduino hangs between the poles, so the current must pass through it.
But the stromlieferde part is not on arduino so the 19.5v from the power supply
the voltage drops over the consumer -
the power supply delivers up to 4,62A - but I was once told the consumer sucks only as much as he needs, it means for me that it also drops over the consumer so it should then arrive at GND nothing or I'm lying there completely wrong
probably I should get drann in more detail -.- #
The consumer only sucks as much as he needs
Is correct. The fan could use in the IDLE against 100 mA-250 mA.
also drops over the consumer
Power does not drop, tension already. You have 19.5V dropping above the fan, but creating a current flow throughout the circuit. This means that 100 mA will flow from your power supply, into the fan, out of the fan, into the Arduino, out of the Arduino, into your power supply. And that could be problematic.
There are no bad or dangerous things going on in the area of tension except smoking Arduinos. But if you're not so familiar with the subject, I'd be smart about it first.
