cyrusthevirus
New Member
I have four fan connected in parallel. The fans each draw .12 A and operate at 12VDC. They are connected to a 12VDC .5A unregulated wall wart. The problem I am having is that when I connect the 3rd and 4th fan, all of the fans slow down. When I measure the voltage, without any fans I get about 17VDC. With fans 1 and 2, I get about 10 VDC. With all fans connected, I get about 8 VDC. Is the problem the unregulated wall wart? Do DC fans have a forward voltage? or is it because the wall wart needs to have a higher Amp rating?
Thanks for everyone's help.
Thanks for everyone's help.