Having fun this weekend using 4-digit shield.
I just purchased a new aero garden and decided to see if the 4-digit shield will run off these lights with a small solar panel.
The $10 panel came from ebay and includes a little lithium battery.
The spec for the panel says:
- Solar energy board: 5.5V/80mA
- High capacity build in polymer battery: 1350mAH
- Output voltage: 5.5V
- Output current: 1000mA
- Dimension: 93×44×10(mm)
Turns out that the Arduino runs just fine driving the 4-digit shield and reading temperature from a DS1820 sensor. Depending on how this thing runs one may have to put the micro to sleep to save some power or perhaps do some other tricks.