Temperature based fan speed control

ericgibbs

Joined Jan 29, 2010
19,136
hi ako,
Welcome to AAC.
What is the purpose of the 10u in the Base of the 2N2222.
Do you have a Arduino sketch you could post.?
E
EG57_ 666.png
 

Dodgydave

Joined Jun 22, 2012
11,375
Ok are you getting a 5V output in the Blue feed to the 1K resistor?

If yes the check the transistor if no then there's something wrong with the Arduino and input.
 

Ya’akov

Joined Jan 27, 2019
9,269
As @ericgibbs mentioned, seeing your code is important. There are two parts to this problem and you have only provided (some of) one of them. Photos of your actual wiring would also help to eliminate a lot of blind questioning.
 
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