Hi, I'm wiring up some 12v fans for my RV fridge. These are 4-pin pwm computer fans. The 4th pin is the pwm input signal. I know the fan runs fine without this signal, but it runs at 100% and I would like it to run much slower. I found that grounding pin 4 causes the fan to spin around 10% of it's full speed. Is this a legitimate way to slow the fan down? Or will it damage anything? I suspect not, that if that were the case it would have been damaged right away.
I had read that grounding pin 4 causes the fan to stop, but I have tried this with two different fans from different companies and they both slowed down to around 10%. They seem to start up fine with pin 4 grounded also.
Thanks.
I had read that grounding pin 4 causes the fan to stop, but I have tried this with two different fans from different companies and they both slowed down to around 10%. They seem to start up fine with pin 4 grounded also.
Thanks.