![]() ![]() Or if I just removed the sockets and manually attached the red and black wires together, and left the 3rd wire loose, would this also work? I am wondering because there's only 1 fan controller that works with molex fans that I've found and it looks pretty good, but i'd much prefer to have a big aerocool one that takes up 2 drive bays since one of the main reasons I want it is to use up some drive bays. So I'm wondering if I use some kind of adapter cable (molex to 3-pin) on each fan and then attach it to a controller, will it still be able to change the speed (obviously it will be unable to show rpm without the 3rd wire). ![]() The only problem is that all the fans in my case are 4-pin molex and have only a red volt wire and black ground wire, and most controllers need a 3 pin connector to read fan speeds. I've had a look around and its pretty hard to get just a temperature sensor that's cheap, so I thought I may as well just go for a fan controller that comes with temp display. I'll suggest a 10 uF electrolytic and a 0.1 uF ceramic capacitor near both the motor and the temp sensor.I've finished building my new PC but hate the empty drive bays on the thing, and I'd love a temperature monitor for peace of mind. These are both inexpensive if you don't already have some on hand. DC 12V 3A 4 Wire PWM PC CPU Fan Temperature Control Thermostat Speed Controller. Generally you want at least one of two types, an electrolytic capacitor and a ceramic capacitor. 5.25in Bay Front LCD Panel 3 Fan Speed Controller CPU Temperature Sensor. This will help to smooth out the power in spite of the noise that the motor itself generates. Power the motor from an external supply instead of sourcing it from the Arduino.Īnother thing that might help is to add some bypass capacitors as close as possible to the motor and to the temperature IC across the Vcc and GND lines. It would be best to separate the temp sensor power/ground connections from the motor power/ground connections completely. Motors are extremely noisy from an electrical viewpoint and it's almost certainly causing your temperature sensor to malfunction. I see that you are sharing the power/ground between your temperature sensor IC and the motor. I am assuming that whatever temperature you are measuring is not rising when the motor is on. ![]()
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