Food Clock
![Food Clock 01 Lemon.jpg](/proxy/?url=https://content.instructables.com/F4N/QYTA/KFPZ8OK5/F4NQYTAKFPZ8OK5.jpg&filename=Food Clock 01 Lemon.jpg)
![Food Clock 02 White Potato.jpg](/proxy/?url=https://content.instructables.com/FB4/TV8T/KFPZ8OL7/FB4TV8TKFPZ8OL7.jpg&filename=Food Clock 02 White Potato.jpg)
![Food Clock 03 Red Potato.jpg](/proxy/?url=https://content.instructables.com/F6K/QABC/KFPZ8OL8/F6KQABCKFPZ8OL8.jpg&filename=Food Clock 03 Red Potato.jpg)
![Food Clock - Touching](/proxy/?url=https://content.instructables.com/FUG/P2GF/KG29LQIF/FUGP2GFKG29LQIF.jpg&filename=Food Clock - Touching)
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).
Cooked Potato
![Food Clock - Cooked Red Potato](/proxy/?url=https://content.instructables.com/FR2/TFBR/KG29LQJK/FR2TFBRKG29LQJK.jpg&filename=Food Clock - Cooked Red Potato)
Testing with cooked potato.
Lemon
![Food Clock - Lemon](/proxy/?url=https://content.instructables.com/FBR/GKAH/KG29LQJU/FBRGKAHKG29LQJU.jpg&filename=Food Clock - Lemon)
Testing with lemon.
Raw Potato
![Food Clock - White Potato](/proxy/?url=https://content.instructables.com/FKA/W1Q7/KG29LQKA/FKAW1Q7KG29LQKA.jpg&filename=Food Clock - White Potato)
![Food Clock - Red Potato](/proxy/?url=https://content.instructables.com/FBY/OMD7/KG29LQKJ/FBYOMD7KG29LQKJ.jpg&filename=Food Clock - Red Potato)
Testing with potato.