How do you connect PWM fan (3/4 pins) to this board (2 pin fan connector)?
#1
PWM fan connector:
[Image: gHnTGVe.jpg]
RockPro64 "PWM controlled fan header":
[Image: rTLOXue.jpg]

What do?
#2
(10-09-2020, 02:09 AM)aleksei Wrote: Seriously, how?

Just use the Vcc and Gnd pins, make sure your fan is 12V type.
#3
(10-12-2020, 11:56 AM)tllim Wrote:
(10-09-2020, 02:09 AM)aleksei Wrote: Seriously, how?

Just use the Vcc and Gnd pins, make sure your fan is 12V type.
That would spin the fan 100%. Where do you stick PWM and read wires?
#4
Hello Aleksei,
  Your fan has non-standard pin colors, so I am not completely sure whether this answer applies. But assuming, this fan complies to the popular specifications (e.g. here 
or here), you have rather bad luck with ROCKPro64.
  The standard 4-wire PWM fan requires 5 Volt PWM signal with frequency between 21 kHz and 28 kHz.
The PWM signal at connector J8 is designed for direct driving a 2-wire fan. It has 12 volt and low frequency (in the standard Linux kernels). The signal is generated from PWM_1 (GPIO4C6), so it is easy to change its frequency by accessing the registers directly. But I do not understand the circuit, which converts the GPIO signal to 12 volt. So I am not sure if it can run well with frequency beyond 21 kHz. Also you would need to convert it down to 5 volts, what makes such solution somehow offending. First shift from 3 V to 12 V, and then back to 5V... I have asked once in this forum, if it is possible to obtain this signal before it is shifted up (https://forum.pine64.org/showthread.php?tid=7877), but no answers.
  Thus, when I hit this problem, I have implemented fan control in a separate Arduino PRO Mini board, which communicates with ROCKPro64 through UART. The Arduino uses very little power and allows me to read additional temperature sensor, which I placed in the housing box.
  Sorry for not knowing a better solution for you.
  Best regards,
  Gienek.


Possibly Related Threads…
Thread Author Replies Views Last Post
  GPIO on the RockPro64 - all pins high? colinmarc 2 1,523 11-18-2022, 10:20 AM
Last Post: colinmarc
Question M.2 SSD not visible when connected via PCI-e board jimh227 4 3,109 07-18-2022, 10:18 PM
Last Post: zer0sig
  Mellanox 10Gbit Connect-x 3en Crashing cmosfxx 0 1,696 02-07-2021, 11:26 PM
Last Post: cmosfxx
  connector type SPDIF FAN RTC battery? ChriChri 4 5,544 03-21-2020, 06:47 AM
Last Post: ChriChri
  Fan connector pc2005 2 4,146 06-23-2019, 02:13 PM
Last Post: pc2005
  Getting 12v from the board domih 2 3,742 06-14-2019, 08:02 PM
Last Post: domih
Sad connect power in reverse :( nhzgroup 6 6,382 05-24-2019, 02:04 AM
Last Post: pfeerick
  PCI-E Graphics Board Possible? Diesel141 1 2,595 04-23-2019, 12:13 AM
Last Post: Bullet64
  Need to access 4 RockPro64 UARTs via Pins. rhex 2 3,931 04-15-2019, 04:27 PM
Last Post: tllim
  Discovered issues with PCIe NVMe & GPU Load in desktop 4.4.174 causing board lockup axelf 0 1,929 04-08-2019, 03:51 PM
Last Post: axelf

Forum Jump:


Users browsing this thread: 1 Guest(s)