I have crafted this miniature air conditioning unit! It measures approximately 30 centimeters in width, yet remarkably, it functions! I employed two SG90 servos in conjunction with an Arduino Uno. The cooling is facilitated by a Noctua NF-A9 5V fan, utilizing a USB-to-fan connector and a 5-to-12-volt USB step-up converter. The fan adeptly handles the 12-volt input. Print files are included! I intend to develop a version two with the capability to integrate Peltier modules. The project consumed roughly 600 grams of filament. I also constructed a control box for the Arduino to govern the servos. For the servos, I utilized the breadboard pack from AZdelivery, incorporating its breadboard power supply. A 9V battery powers the breadboard, as the Arduino lacks sufficient power output for the servos. Links are provided below. 5mm magnets secure the Arduino holder to the baseplate.

The servo code is also included!

(WARNING: Exercise extreme caution when connecting the positive and negative leads on the breadboard and power supply! Failure to do so may result in short-circuiting your components!!!)

Links:

fan:

https://www.amazon.nl/Noctua-NF-A9-PWM-Hoogwaardige-5V-uitvoering/dp/B07DXTN515/ref=sr_1_1_sspa?__mk_nl_NL=%C3%85M%C3%85%C5%BD%C3%95%C3%91&crid=2CE9YJZ7AQGAZ&dib=eyJ2IjoiMSJ9.lR8sVZ7-0Kteu1r-spTvulVbHzIHnhT1LSD7O0_baHg47sl9BN6H-nAS9Fdw2ZyKrL4hWYZn71LveTjb8nkzQlWdkWTFzI9tapJuN53IDX7q_eGMqCfbvB7TzZDoVjhZBsNOjc_mCEDH-Y7Wk5_SAbIljWyx6XFnbo0cJJXkTGybYioRgYSUhyEERzyFs0NnbeO5UMgwsDCwEGJTY-TB2MgC76lE6g_n7x9UsjOGduBYwmNHI01h2bR18prms9V0eCIu8aJvECPU8ZRZHoo3-FEasIFTsVHZ06JGMUmPH7U.wKN9QG4Up6XGYaVqNZDc9VMw7YZwZSYiWkwdd5yXugQ&dib_tag=se&keywords=noctua+nf-a9+5v&qid=1737640518&sprefix=noctua+nf-a9+5v%2Caps%2C164&sr=8-1-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9hdGY&psc=1

USB to fan connector:

https://www.amazon.nl/JSGHGDF-mannelijk-3-pins-Adapter-Connector/dp/B0DHGPH1C2/ref=sr_1_6?__mk_nl_NL=%C3%85M%C3%85%C5%BD%C3%95%C3%91&crid=12O6HGM9BFDF5&dib=eyJ2IjoiMSJ9.5y_mKjP7bV4puJTNf1CjGIeU1TLhuTqHrzHU3mWSsJ77IoeB1h4rUDdaY7bN7r84nCd54By9A0hO4Px_Eud5rhlLNxUyCUo7_y8LdWEOU9Ho8KmJCmLoyMNduswqAuaFY9GjAvEdSJt5-aMCLy1AqfS06NGCbFVMhA9zR3yUQf63MEiWV5poXz74D1o9yp_nCvOkdXsLvKgzj0oCjvyz2Rs1ueqQToeJDUzbG3ZxMeArEI_j3oimVz-O1Py2vgzF1FWGfK99ae0SFvJEVr92xdezqKrPomz5yvK8K79kh7yPFMKm6j4WFbQ6KkLZ92hLlHG5R-ti1VGUOcclBNJVlmq3eK16n0AEhhwe-N2qmcV9APLN6nH5ohNC2tgB6gbD_cdIQFHaWBO4UArk7dREVF1sRTSqbpZTnNPp0w3hm8cIpB8lufxZ9RZcCN9NL3hb.SUjf4I9mU6LU-LPGvLCjhRGWOPAb-vd5cCPDT8F1kA8&dib_tag=se&keywords=usb+to+fan+connector&qid=1737640573&sprefix=usb+to+fan+connector%2Caps%2C151&sr=8-6

5-to-12-volt converter:

https://www.amazon.nl/USB-ventilator-snelheidsregelaars-Snelheidsmodule-Snelheidsregelaar-Windsnelheidsregelaar/dp/B07ZFJDJHW/ref=sr_1_1?__mk_nl_NL=%C3%85M%C3%85%C5%BD%C3%95%C3%91&crid=2X0BDBLIXE8M4&dib=eyJ2IjoiMSJ9.jeLETXNoUGkQmHs7Ap3rCkt09ew-COXIRE-v5I-A2s_4_LJEqG4AcDSQMi1SdZfyN81GZ2HcyYHf5mes0ELRdP8aorW2OLeuA56_lOrFaDeB3gi-xoRNtbANptm9F284xLkskBbYr7TcTAlYfxFSom1lI7j-nLpW3uVx7LvB9HZiJ3ZCjo0vd1aUa4Fhz7Xp2NsN6wrra2OGS2P3fveYHCFC4gOz98fS0p67LEcwXJ8MOBZJXliPy27suOIpCNpdnapRfG7GPkclaNbj75MmgFftF5F7Wg_V9WmpDqIlWBU.2hRVEcTbcWNcF9A7AGKrN2Mk4PL_cPhcAP8GKXhmFGA&dib_tag=se&keywords=usb+potentiometer&qid=1737640610&sprefix=usb+potentiometer%2Caps%2C128&sr=8-1

Arduino Uno:

https://www.az-delivery.de/en/products/mcu-mit-atmega328p-und-usb-kabel

Breadboard starter kit:

https://www.az-delivery.de/en/products/mb-102-breadboard-kit

Servos:

https://www.az-delivery.de/en/products/az-delivery-micro-servo-sg90?variant=12236811731040 (a three-pack is recommended)

9V to barrel jack for the breadboard power supply:

https://www.az-delivery.de/en/products/batterie-clips-mit-15cm-anschlusskabel-fuer-9v-block