DHT22 Arduino Programing

Hi

I am using the source code from this website as a reference.

Attached file is my wiring diagram.

When I am uploading the code, fan voltage is too low. Its only showing approx 1.5V which I am expecting same as battery voltage. Can someone help me where I am doing wrong. In the attached file, it shows where my voltage is low.

Any help would be highly appreciated.

Regards

What voltage do you see if you remove the wire from the Arduino output and take it to 5V or GND ?

Hey thanks for your response. I tried what you asked for. When I am removing the wire from output, i.e., D4 and putting to GND then voltage is zero but when I am putting to 5V, its showing same 1.9V as D4.

when I am putting to 5V, its showing same 1.9V as D4.

Not an Arduino problem then. Someone with more electronic knowledge than me should be able to provide advice, but maybe move this query to the General Electronics section of the forum.

And the layout from the OPs pic

vinceherman:
And the layout from the OPs pic

Yes i took this from the reference as stated above.