Hello
I am trying to control a fan with arduino as It is explained in this blog:
[
bildr.org]
But I want to make it different,...
I want the fan works by default, just in case the arduino fails, or something happens....
The circuit I am trying is the following, modelled with LTSPICE..
..
I am using a pulsed power source as Arduino´s PWM.
The problem is that pwm power source gives me 270 mA back to Arduino...and Arduino only holds 40mA..
Maybe the voltage pwm is not right simulated.,,I do not know too much about circuit simulation...
Can someone give some advice????
Thank you all.