Quantity   Component name
1 × Sparkfun ESP32 Thing Microcontroller board with some I/O and Wifi onboard. Available at https://www.sparkfun.com/products/13907
1 × Solarmodule 12V 20W Solarmodule rated at 12V for at least 20W (peak), e.g. Süd SOLAR GmbH Art.Nr.03120. Available at e.g. Amazon.
2 × Micro USB cables One to cut for pieces and one to power ESP32
1 × USB Battery pack Standard USB Battery Pack that supports charging and discharging at the same time.
1 × DC-DC Step Up Boost 5V to 12V DC-DC Step Up converter to transform the USB Battery 5V to 12V required for LEDs. Available on e.g. Ebay.
1 × XL6009 DC Step Up Down Converter Adjustable Step Up Down converter to transform the varying solarmodule voltage into 5V for charging the USB Batterypack. Available on e.g. Ebay.
1 × LEDs LEDs to illuminate the art piece at night.
1 × LDR Light dependant resistor to detect day/night.
1 × Resistor 10kOhm resistor for connecting the LDR to the ESP32 Thing.
1 × Mosfet Mosfet to switch the LEDs, e.g. IRF3707Z.