Prusa I3 Mk3 Geko Psu Fan Speed vs Temperature Regulated

Updated 31 January : Added Manual "how to program the regulator"

RELEASED

Here is the temperature controlled version

...An old working power supply is a power supply that has been well cooled throughout its life...

Hi !

A simple frame to hold a 12V fan onto the Prusa I3 MK3 power supply
(not tested on MK1, MK2,,but tell me if it's work on your psu frame..)

The input of the controller must be connect directly to the 12v power supply output
Here is the fan i use and recommend
Very low noise and durability
Sunon is a fan brand you can count and that will hold the entire lifespan of the printer

60x60x15
http://s.click.aliexpress.com/e/vuOTDRS

Quieter yet if it's possible.
60x60x20
http://s.click.aliexpress.com/e/bgouNMJI

You need this fan regulator
https://s.click.aliexpress.com/e/_DCAju0Z

And this Dc/dc step down converter 24v->12v (this model is adjustable)
https://s.click.aliexpress.com/e/_DnEOU13

Here is the link for the DC/DC housing i made in the 'Prusa MK3 style'
https://www.printables.com/model/473896-lm2596-lm2577-xl4005-xl6009-dcdc-snap-on-buck-conv

The upper leg is intended to accommodate the temperature sensor.

I suggest you to wire all the parts, place the CTN sensor to the upper side of the PSU and adjust the differents parameters of the fan regulator before to fit all in their housings.
It's must be very tricky to act on the fan regulator settings I add the manual related i found on the web.

You have to add 3 pieces of 1.75mm clear filament in the led holes, these filaments must be cut with 90° angle with a razor blade and be adjusted in front of their respective leds

Happy printing !

Renaud

(not tested on MK1, MK2,, because unfortunatly i don't own these printers versions but tell me if it's working on your psu frame..)