Before you resort to memorizing recipes, you can give GestureChef a try. It is a touch-free device for displaying recipes safely.
Once upon a time, recipes were passed along through direct tutelage. Then humanity developed writing and suddenly we had the ability to recreate our great-grandmother’s chicken soup recipe with perfect accuracy. Then humanity developed Pinterest and we gained the ability to recreate every great-grandmother’s chicken soup recipe. The problem is that scrolling through a recipe on a smartphone while cooking is unsanitary. Mukesh Sankhla’s GestureChef is a touch-free, food-safe device for browsing digital recipes and it solves that problem.
The goal for this project was to replace the smartphone on a countertop with a device engineered specifically for cooking. With a smartphone, just scrolling to the next step of a recipe requires touching the screen. Not only is the screen covered in bacteria that then transfers onto your fingers and ultimately your food, but bacteria from the raw food also transfers to the screen. It is enough to give Gordon Ramsey a heart attack. But before you SHUT IT DOWN and resort to memorizing recipes, you can give GestureChef a try.
The device contains three important electronic components: a DFRobot 4.7” E-Ink display with integrated development board, a DFRobot GR10–30 gesture sensor, and an 18650 lithium battery.
That gesture sensor is key to the device’s functionality. It costs just $23 and can automatically detect 12 different gestures (such as swiping left and waving) from up to 30cm away, then communicates with a connected microcontroller (via UART or I2C) to send a notification about the gesture. In this case, GestureChef makes use of four gestures: wave right (new recipe), wave left (previous recipe), swipe up (show instructions), and swipe down (return). The unused gestures can be set to other functions if the user wants to expand the device’s capabilities.
The E Ink display’s built-in development board contains an ESP32-S3 microcontroller. It also has a connection for the lithium battery, which makes charging easy. And other extras, such as a microSD card slot, are useful, too.
The enclosure, which Sankhla designed in Autodesk Fusion 360, is 3D-printable and looks really nice. And it assembles with just a few screws and magnets.
It isn’t entirely clear where GestureChef stores recipes — the firmware is currently missing from the tutorial (an oversight which should be addressed soon). It is possible the recipes are hardcoded into the firmware, but it would be cool if it pulled them from text files on a microSD card or even from an online repository.
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