08-21-2019, 12:54 PM
Ok got a reply from Noctua, a new guy asking for the ticket number with the older employee who left so he can read the trial and tribulations of all my Noctua fan failures and three warranty replacements, hopefully soon to be 4 and final.
It sounds like he wants to aid troubleshooting, although voltage reaching hub is confirmation something on circuit board has failed like all previous failed noctua IPPC nf-f12 120mm fans.
Speed controlling fans via voltage manipulation shares a lot in common with dimming LED lights, something I am also dabbling with at the moment. One project has 11 194/t10 LED bulbs that each have 10 3030 chipsets. These are quite bright and are on a pwm LED dimmer and create a LOT of heat at their highest brightness. I have added a 25mm computer fan to help the LEDs from overheating, whose speed changes with the lights brightness. Unfortunately the fan makes a horrendously loud whining sound at reduced speeds.
I might be employing a buck converter that has a frequency of 150khz which I cannot hear, as opposed to 13khz which I can.
But then I lose some maximum input voltage and brightness. Not sure that will acceptable to me.
A new delivery arrived, a voltage bucker with a current potentiometer. gonna go see if the current pot can tame the 120mm screaming banshee to tolerable amperage and sound and airflow levels.
It sounds like he wants to aid troubleshooting, although voltage reaching hub is confirmation something on circuit board has failed like all previous failed noctua IPPC nf-f12 120mm fans.
Speed controlling fans via voltage manipulation shares a lot in common with dimming LED lights, something I am also dabbling with at the moment. One project has 11 194/t10 LED bulbs that each have 10 3030 chipsets. These are quite bright and are on a pwm LED dimmer and create a LOT of heat at their highest brightness. I have added a 25mm computer fan to help the LEDs from overheating, whose speed changes with the lights brightness. Unfortunately the fan makes a horrendously loud whining sound at reduced speeds.
I might be employing a buck converter that has a frequency of 150khz which I cannot hear, as opposed to 13khz which I can.
But then I lose some maximum input voltage and brightness. Not sure that will acceptable to me.
A new delivery arrived, a voltage bucker with a current potentiometer. gonna go see if the current pot can tame the 120mm screaming banshee to tolerable amperage and sound and airflow levels.
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