Case + Finishing touches

So, I've designed a simple case, finished the BOM and README, and pushed everything to GitHub. That's all for now, and I'll be ending the project. Here are a few photos:

PCB Routing

There's not really much to say here. I've started routing the PCB and haven't paid attention to anything except the trace width of 0.8mm (1.4mm at 12V). Tomorrow I'll create the repository, write a readme, generate the bom.csv file, and finalize all the files for submission. Here's the finished PCB in 3D render:

Edit: I need to add mounting holes tomorrow so the pcb can screw into a case.

Here is a photo where the traces are routed so far, but there is no ground plane and no artillery yet.

And here it is again with kiloan artwork and ground planes in the editor.

Idea + Schematics

So, I had the idea to create a central control unit for PC fans, or rather, I would need one for a mobile rack that also houses computers. Then I could adjust the fan speeds independently of the different computers.

Requirements:

• ESP8266 (cheap)
• simple web server on the esp to control the fans
• 12V powered (using the PC power supply)
• choose 3-pin or 4-pin fans

My concept is as follows: the ESP can read the RPM values ​​of the individual fans, PWM1 is used as the fourth pin to control 4-pin fans, 12V is supplied by a MOSFET which the ESP interprets as PWM2, and for 3-pin fans, the MOSFET is controlled either by adjusting the speed accordingly or simply by passing 12V through to control 4-pin fans. Therefore, only fans of the same type should be used together, which isn't a problem since that will be the case for me. It can be that simple. A voltage regulator for the 3.3 volts and the schematic is complete.