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.