Parent How-To: Electronic Diaper Knows When It's Wet

Parent How-To: Electronic Diaper Knows When It's Wet

Laura E. Hall
Feb 14, 2011

It was only a matter of time before a crafty DIY-er realized they could put a microcontroller into a diaper to measure changes in voltage due to wetness present. And that day has arrived, along with an Instructables to help you, too, create a wetness-sensing diaper of your very own.

Using a PIC Microcontroller 16F88 and a wetness-sensitive voltage divider, this proud papa has crafted a diaper setup that buzzes and flashes a light when the diaper becomes wet.

The Instructable comes with all the software and circuitboard patterns you need, assuming you can do your etching at home. Once the board is soldered together, the package is wrapped in fabric and attached to a diaper, with a probe inserted inside.

Wetting the probe results in an intense buzzing, as well as the LED lighting up; these must be reset after each diaper change.

Unfortunately for the sake of the experiment, the original creator's child would have nothing to do with the electronic diaper, so its real-life practicality is as yet unknown.

And while the original author warns that despite having taken all precautions being taken, there's some risk of electric shock, commenters point out that a smaller, safer version could easily be produced commercially.

Check out the full list of steps on Instructables.

If you could buy it in a store and knew it was safe, would you diaper your kids with an electronic wetness-sensing diaper? Let us know in the comments below.

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