Practical 13

Solar Cells for Devices

You are provided with 20 solar cells (like the one in the first picture below). Decide how many solar cells are needed to provide enough energy to make these solar powered devices work. How are the cells connected to each other to provide enough voltage and current?

Solar cell unit

Each unit provides:
Voltage = 0.5V
Current = 0.1A (or 100mA)

You have up to 20 units to provide electricity to the following devices:

Toy buggy

Requires
1.0V
0.2A

Radio

Requires
3.0V
0.3A

Model plane

Requires
1.5V
0.4A

Calculator

Requires
0.5V
0.1A

Garden LED light

Requires
2.0V
0.1A

Toy Boat

Requires
1.5V
0.5A