Low Energy Solar Fridge controller DIYMy target was to make very cheap and very low energy refridgerator controller to 12V solar system. Low energy fridge can be implemented with container type freezer with AC power and inverter (1000W) to be controlled by designed controller.
Schematic diagram and PCB
Main components of the controller are STM8S103 (module or IC), BLE module JDY-08 and
LCD display 16x2 lines.
Printed circuit board as KiCad 3D:
STM8S103 program was developed with ST Visual Studio Developer and COSMIC STM8 C-compiler.
3D printed case
3D printed cover using PLA filament:
Android application developed with Android Studio. Android phone can be used to adjust temperature setting, control inverter and display temperature / battery voltage information.