Now there was only the question of the fan. There is seemingly a lot of space between the cooler and the monitor case, but unfortunately not 25 mm for a normal PC fan. Also, the fins run from the bottom to the top and are closed up at the sides, so I would have to angle the fan at least to generate airflow through the fins.
Since noise, followed by reliability were also important criteria, I landed pretty quickly on Noctua’s product portfolio. Since there would be no room for a thin 120 mm fan angled, I had to switch to the next smallest narrow model, the 40 x 10 mm tiny NF-A4x10. Of course, 14 Euros for a fan, especially in this size is extremely expensive, but compared to the purchase price of the monitor, it was worth it to me.
Now the only question was where to get 12 V for the small controller board at the monitor’s circuit board. A few open heart measurements later, I was able to identify this pad next to the existing 12v fan connection. Unfortunately I didn’t find a pad nearby for the grounding, so the screw hole next door will have to do. Electrical engineers please don’t roast me too much in the comments. 😛
Now it’s time to implement the mod. I use 0.75 mm (AWG16) stranded copper wire, which I had left over from modding power supply cables – of course completely overkill for the currents that will flow here, but it doesn’t hurt either. Further, for simplicity’s sake, I reach for my “Pinecil” USB-C mini soldering iron.
5 minutes later the cables were attached and I could start with the first test run. The thermistor for the temperature measurement I attached on the heatpipes directly after the board and simply misused the already existing tape for this purpose – why not recycle what is already there anyway. With the three buttons on the controller PCB, L and H can then be used to set the start and end temperature of the fan curve and the fan speed in percent for the current temperature.
Of course, this is only the external temperature of the heatpipes and the FPGA chip should run a good bit warmer, but at least the monitor never reaches the emergency shutdown temperature even passively without a back cover. Also for the final mounting of controller board and fan I just used the various tape strips again. In the case of the fan, the tape also acts as a guide surface for the airflow to the cooling fins.
9 Antworten
Kommentar
Lade neue Kommentare
Urgestein
Urgestein
Urgestein
Veteran
Mitglied
Veteran
Urgestein
Veteran
Alle Kommentare lesen unter igor´sLAB Community →