Freon: Freeze On Neck personal cooler !
At the heart of Freon is a Peltier element, a cutting-edge thermoelectric device that actively transfers heat away from your skin. This isn't just a fan blowing air around ; it's active cooling that genuinely drops the temperature.
This project is fully open/source open/hardware. Everything is described here : https://hackaday.io/project/203557-freon-freeze-on-neck-personal-cooler and there : https://www.pcbway.com/project/shareproject/Freon_Freeze_On_Neck_personnal_cooler_9cee9e46.html
Arduino code is here: https://github.com/f2knpw/Freon_cooler/blob/master/ESP32_Freon_Cooler.ino
B4A code is here: https://github.com/f2knpw/Freon_cooler/blob/master/JP_Freon_Cooler.zip
see what is inside
