07-30-2018, 09:35 AM
(07-14-2018, 01:33 PM)tllim Wrote:(07-11-2018, 01:28 PM)mikeD Wrote: Hi
I have just fitted a fan to my heatsink.
When I checked the voltage on the connector labelled FAN, there is no voltage.
Currently I am taking the 12 volts from the 4 pin socket behind the power socket.
Should the FAN socket be working?
Thanks
mikeD
There is a 2 Pin 12V fan port at the Pi2 bus. This is a PWM control fan port and speed can be controlled by software.
You also can use the 4pin 12V socket for Fan but this si always on.
Hi,
I have a couple of extra questions regarding fan control. I feel like I am missing something fairly basic, but I havent been able to find another source for this information.
1. Is there a way to enable the fan pins?
(Pine64 sold a small 12V fan made for the rockpro64 board, but there doesnt seem to be an explanation on how to turn it on or enable the pins.) Could it possibly be part of or an extension of the pi-2 bus?
2. I tried to install fancontrol as part of lm-sensors but lm-sensors returned that there were no sensors installed, which prevented fancontrol or pwmconfig from running. I also installed xsensors, psensor, neither of which were able to locate a temperature sensor either. BUT, 'sensors viewer' is reading something: "ACPI v<Unknown> zones" and displays a thermal_zone0 and thermal_zone1 are showing a realiztic looking 38C ... until you run some cpu tasks -- which you can feel the change in temperature in the mid-profile heatsink just by touching it, yet the value hasn't budged, so I am skeptical that it is actually reading a value. Does this imply that I have a defective sensor, or is is just not enabled.
3. I have been trying to find examples from other pine64 boards to see if I could adapt it, but it appears that no other board had a dedicated 12v 2pin fan port. Perhaps I suck at finding stuff in forums/google. I have seen other examples using the PI-2 Bus itself, but I would prefer to use the pins specifically designated for that purpose.
If you suspect I have missed something, or want any terminal outputs, etc. please let me know.
Thanks,
