[AUTO/WELD Dual Mode] Cyberpunk Smart Desk Fan: A Sci-Fi Summer Desk Setup for Electronics Enthusiasts

It all began when, on a whim, I purchased a 12V-120mm*120mm chassis fan

I'm not even sure why I bought it; I didn't even need it electrically!

I figured I'd eventually find a good use for it

And that day arrived—I decided to craft an elegant fan!

So I plugged it in to test the airflow… I completely overlooked the "ultra-quiet" inscription on the label… A 1000 RPM fan is indeed quiet… but it produced virtually no airflow—not a whisper of a breeze
This frustrated me, so I promptly bought a 2600 RPM chassis fan with PWM speed control

"I absolutely must create a miniature fan!"

…

Regardless, I succeeded~

• I call it the Cyber Fan, though its aesthetic is more akin to Peak Power's style~~
• Includes an SFT-1 smart terminal: It displays the current mode, temperature, humidity, and fan power in real-time
• Features two modes: (Switch between modes using the terminal's tactile button)
  • AUTO mode: The default power-on mode. In this mode, the fan autonomously adjusts its speed based on ambient temperature information (the fan will not start below 18 degrees Celsius, and will operate at 100% power above 30 degrees Celsius)
  • WELD mode: Dedicated welding mode. In this mode, the fan locks at 95% power. Here, you will need to manually reverse the fan's orientation (yes, manually—I initially considered reversing the motor, but computer chassis fans do not support this, and rotating the fan housing proved user-unfriendly for replicators, so I abandoned the idea). The fan then functions as an exhaust device, effectively drawing away welding fumes at a distance of 12 cm! (Welding mode has a maximum duration of 30 minutes, after which it automatically switches to AUTO mode; you can switch it back again)
• Honestly, replication might present a slight challenge, albeit a minor one. But I believe it poses no obstacle to true tinkering enthusiasts, hahahahahahaha
• For the code, please refer to [Document 1 Code Section]
• For wiring instructions, please refer to [Document 2 Wiring Instructions]
• Materials required:
  • One 12V 120*120mm computer chassis fan (requires a 4-wire speed control version; strongly recommend 2600 RPM or higher, otherwise you will be disappointed)
  • One 12V 3-way output power supply module
  • Four 6mm*2mm cylindrical magnets
  • One 0.96-inch OLED screen
  • One ESP32 C3 standard microcontroller
  • One DHT11 temperature and humidity sensor
  • One 8050 transistor
  • One tactile switch
  • Several female-to-female Dupont wires
  • One 220-ohm resistor (for the transistor base)
  • One 12V 1.5-2A power adapter

Ingenious makers, what are you waiting for? Get crafting!