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    Fan control

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    • B
      bibi last edited by

      Hello all!
      This topic has already been discussed few times as i saw but I didn’t find info to achieve what i want. Maybe someone is also looking for a similar solution with some electronic skills and we can work together to find the “perfect” solution :p (a relay based solution is omitted on purpose).

      The idea is to have a circuit to control 2 fans (12v - 0.33A) with either a mosfet or a bjt with a good schematic that will protect the Pi with some pull-down resistor, diodes, etc and finally cool down the whole mirror when the temp threshold is reached.
      If anyone is interested to have such a system and gain knowledge at the same time in electronic, feel free to share ideas.
      First objective would be to determine which type of transistor would be the best: mosfet or bipolar and why?

      JerryP 1 Reply Last reply Reply Quote 0
      • broberg
        broberg Project Sponsor last edited by

        or just a 12v supply with a relay that reacts to the 3v/5v output of the raspberrys gpio …

        or just a relay if you already have the 12v supply.

        B 1 Reply Last reply Reply Quote 0
        • B
          bibi @broberg last edited by

          @broberg thx for your input. As mentioned above, i wanted to avoid using a relay to have a silent system

          broberg 1 Reply Last reply Reply Quote 0
          • broberg
            broberg Project Sponsor @bibi last edited by

            @bibi fan controllers are cheap.

            or get 5v fans?

            B 1 Reply Last reply Reply Quote 0
            • B
              bibi @broberg last edited by

              @broberg have already a 5v fan… i am rather interested in gaining knowledge about transistors by building a “project” to cool down my whole MM system.

              1 Reply Last reply Reply Quote 0
              • H
                harney last edited by

                Here is a great system. Fully automatic and silent(ish) with variable control. Took about 5 minutes to make a small board with the resistors and diode and the code is already done.

                [link text]https://www.instructables.com/PWM-Regulated-Fan-Based-on-CPU-Temperature-for-Ras/(link url)

                1 Reply Last reply Reply Quote 0
                • JerryP
                  JerryP @bibi last edited by

                  @bibi
                  I use this one
                  https://www.elektor.nl/fan-shim-active-cooling-for-raspberry-pi-4

                  works ferry well

                  1 Reply Last reply Reply Quote 0
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