hi,
i simply connected pwm-pin of the fan with an output of my wemos d1 mini and gnd of the fan with gnd of wemos d1 mini.
that works for a short time (5s, sometimes 10s, ...).

edit: will using the 2n2222 as in your picture stabilize it?

regards,
andre

the fans are 4-pin fans, DC, 12V, so they can be controlled completely by pwm as far as i underrstood. it would be enough if alle 3 are running in parallel (same RPM / PWM). is it possible to connect them all to the same wemos-output-pin to control all fans at once? i hope to get a simpler circuit. ...

hi,
i have a wemos d1 mini in place for checking room temperature and getting values from my powermeter (serial server).
now i want to control 3 fans by pwm in that room.

what is the simpliest way to achieve that? do i need external mosfets?

regards,
andre

timingstats are available, but i am not able to see what might cause an issue. but i think it is nevertheless related to wifi. the ping is quite ok, but nevertheless i observed that when my children are near the esp8266, the issue got worse... so i put an access point beside the esp8266 and it seems...

thanks, gratuitoius arp is disabled, but i don't have network timeouts. a ping is running fine all the time with a latency below 30ms which is from my pov quite ok for a wlan connection. cpu eco mode was turned off, i turned it on just to check if it will change anything. but it didn't turned it off...

hi, i am using esp easy on my esp8266 (wemos d1 mini) with an "serial lesekopf" (ir receiver for reading of my smart power meter, e.g. https://www.thingiverse.com/thing:3378332). from a server i collect the current value by accessing the serial server on esp easy. all in all it works., but...