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Gadget Freak Case #237: Dishwasher Indicator Eases Unloading

Jitendra Tailor's gadget uses a proximity sensor and a flashing LED to tell his family members when to load or unload the dishwasher.

Most dishwashers come equipped with an indicator that lets people know when the dishes have gone through a complete washing cycle. Some people will open the dishwasher and get some clean dishes, but they won't unload it completely. The "clean" indicator will turn off, but people might not know whether the dishes are clean.

This gadget uses a flashing green LED to let people know the dishes are clean. An infrared proximity sensor detects the presence of a person near the dishwasher and turns on the LED circuit. The LED state remains set until someone completely empties the dishwasher. Even after you open the door and take out only a few dishes, the green LED will flash when people approach the dishwasher, so they see a reminder to unload it completely.

After the dishwasher is emptied, a red LED starts flashing, and people can start to load it with dirty dishes. Now no one will have any doubt about whether the dishwasher is full of dirty or clean dishes. The indicator tells it all.

Jitendra Tailor's gadget uses a proximity sensor and a flashing LED to alert his family members when to unload clean dishes from the dishwasher or load it with dirty dishes.

Here are the mounting positions of the LEDs and the infrared proximity sensor
on the outside of the diskwasher's kick plate.

Do you have a Gadget Freak project you would like the world to see? Send a brief description of your gadget and a photo to Senior Editor Rob Spiegel.

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