Search found 3 matches

by Empusas
Tue Oct 08, 2019 4:33 pm
Forum: ESP32 boards
Topic: Reading fan tacho signal frequency?
Replies: 8
Views: 1029

Re: Reading fan tacho signal frequency?

Well, the tacho signal is an open drain output, that does introduce any voltage in the system. You can use a 10KΩ pull up resistor to 3.3Vcc and a 3.3V z-diode connected to ground as voltage divider to limit the tacho signal voltage to 3.3V max. Noctua provides a white paper on more details about th...
by Empusas
Tue Oct 08, 2019 10:08 am
Forum: ESP32 boards
Topic: Reading fan tacho signal frequency?
Replies: 8
Views: 1029

Reading fan tacho signal frequency?

Hi, I want to use my ESP32 also to control the fan speed of my PC water cooling system. I am using LoBo´s precompiled micropython as I need the SSH client for another task in the system. I think I have everything I need, except I don't know how to read the fan speed. I will use an analog in to read ...
by Empusas
Tue Oct 08, 2019 9:40 am
Forum: ESP32 boards
Topic: Differences between Micropython ports for ESP32 and ESP8266
Replies: 34
Views: 19201

Re: Differences between Micropython ports for ESP32 and ESP8266

The only reason for me to choose ESP32 over ESP8266 was the LoBo MicroPython build with SSH client. I my use case I wanted to add additional buttons to my new PC case to start/stop VMs running on the hypervisor. I needed a secure way to login to the hypervisor and execute a command. LoBos SSH client...