Introduction: Food Clock
You can see the Food Clock working in the photos. I purchased this kit from Jaycar Electronics for about $12.
The terminals are made from copper (positive) and zinc (negative).
You can try looking for my videos on YouTube.
Supplies
Components: potato clock kit from Jaycar Electronics, power source (potatoes, lemons, tomatoes).
Step 1: Cooked Potato
Testing with cooked potato.
Step 2: Lemon
Testing with lemon.
Step 3: Raw Potato
Testing with potato.