I built a small Arduino (Uno) flats box dimmer project in a cheap project box for an Arduino Mega recently. Essentially just the Uno, a Mosfet and an RCA output connection (USB and 12V input to the existing Uno input ports). Using the larger project case left space for the MOSFET and RCA, and the existing mounting points still worked fine for the Uno.
Wonder if the same simple box would be sufficient to give the sensor access to open air, wouldn't need 12V - hopefully heat from Uno would be negligible? Obviously much bigger than a Temperhum stuck in a USB port, but not huge.
https://www.ebay.com.au/itm/Black-AB...frcectupt=true
This was the original CN's thread about the Alnitak dimmer project BTW for reference:
https://www.cloudynights.com/topic/5...ak-flat-panel/
First post has a pic of similar project box, but more enclosed than one I linked to above.
(if I can do it, anyone could.....)
Might also be possible to use the Arduino Nano and go much smaller again?