Tiny AVR Microcontroller Runs on a Fruit Battery

Step 7 Battery Performance

Only one bit (bit PB3 on Pin 2) is being toggled.

The lemon battery performance (ambient room temperature 30 degrees Celsius) was measured as follows:

Number of Cells: 4
Open Circuit Voltage: 3.2V
Short Circuit Current: 1.2mA
Voltage with AVR TIny13V and LED load: 2.5V
Voltage with AVR TIny13V and LED load after 3 hours of continuous operation: 1.9V


Number of Cells: 3
Open Circuit Voltage: 2.3V
Short Circuit Current: 1.0mA
Voltage with AVR TIny13V and LED load: 1.89V
Voltage with AVR TIny13V and LED load after 3 hours of continuous operation: Not measured