The human race is far ahead in technology. Potatoes are generally known as edible vegetables. These potatoes are not only delicious and nutritious as food but also serve as a source of energy. Find out what it takes to do this. Everything you need: 1. A few potatoes. Iron nail 3. Copper sheet 4. Some of his connection methods: Nail and copper sheets are attached to the potato and connect to the small digital clock or LED. Electricity will be generated from this diameter.