Introduction During the last weeks I upgraded my solar-usb-charger system. Here you can find the original design: http://www.zipfelmaus.com/bau-dir-ein-apple-solar-ladegerat/ (german article). What the old design basically did was converting the 12V DC from the solar powered battery system to USB friendly 5V DC. New Features I added a couple of features: […]

Upgrade: Solar-USB-Charger

Currently I’m working on two Arduino projects, both will upgrade my weather station. OLED I2C display The OLED is connected to an Arduino Nano via I2C and it measures the current voltage of the solar powered batteries. The OLED display is available at wide.hk for 16$. Lightning Shield The other […]

Arduino: OLED I2C display and Lightning Shield