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Fans.....who needs 'em?

paws

Well-known member
Eh, I can hardly open a cupboard here without a microcontroller board of some kind falling out, I'd love to see that code.

Don't you need a transceiver to speak RS422 to the Mac, though? I was actually thinking about this today, since I have some high quality faders that I want to make a MIDI fader box. And of course, the sensible thing would be to just put MIDI sockets on it, but when it's for connecting to a NuBus ProTools rig, sensible isn't really a design requirement, more like the opposite...

 
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Crutch

Well-known member
Right. You need a MAX232 IC to convert the Arduino’s TTL serial to RS232, and then you can convert that to RS422 just by wiring it up correctly. That’s what I did here. 

 

ymk

Well-known member
Ok, I’m convinced!  Any suggestions for good, quiet (QUIET!) fans?!


  • be quiet! Pure Wings 2 80mm, BL044
  • Noctua NF-B9 redux

I run those in my PM6100 and Centris 610 at reduced speeds and they are virtually silent.  Convection cooling isn't viable for these machines.  With no fan, the top of the PSU will get hot, but even a slow fan keeps it near ambient.

Right. You need a MAX232 IC to convert the Arduino’s TTL serial to RS232, and then you can convert that to RS422 just by wiring it up correctly. That’s what I did here. 


Neat project.  Would feeding TTL directly to the Mac's opposite input pin work?

 

Crutch

Well-known member
Neat project.  Would feeding TTL directly to the Mac's opposite input pin work?
No, that can get you from RS232 to RS422 (which is what I did here actually as the last step), but you need the MAX232 transceiver to get the voltage levels out of the Arduino right first. 

 

jessenator

Well-known member
One of their big "goals" for 2021 is a "white" line of fans :lol:  As Steve from GamersNexus said, something that no one would bat an eye at from any other company, but from Noctua, it's a big deal.

 
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