From bd5c1d7088d562a37ec63bdb27a9e14405108ecd Mon Sep 17 00:00:00 2001 From: Kevin O'Connor Date: Thu, 23 May 2019 19:29:24 -0400 Subject: [PATCH] config: Advise against using hardware_pwm for fans Signed-off-by: Kevin O'Connor --- config/example.cfg | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/config/example.cfg b/config/example.cfg index a692a6f6..fb5a716e 100644 --- a/config/example.cfg +++ b/config/example.cfg @@ -244,10 +244,12 @@ pin: ar9 # fan. It is recommended this be 10 milliseconds or greater when # using software based PWM. The default is 0.010 seconds. #hardware_pwm: False -# Enable this to use hardware PWM instead of software PWM. When -# using hardware PWM the actual cycle time is constrained by the -# implementation and may be significantly different than the -# requested cycle_time. The default is False. +# Enable this to use hardware PWM instead of software PWM. Most fans +# do not work well with hardware PWM, so it is not recommended to +# enable this unless there is an electrical requirement to switch at +# very high speeds. When using hardware PWM the actual cycle time is +# constrained by the implementation and may be significantly +# different than the requested cycle_time. The default is False. #kick_start_time: 0.100 # Time (in seconds) to run the fan at full speed when first enabling # it (helps get the fan spinning). The default is 0.100 seconds.