One of the problems with being a graffiti artist is that you have to carry around a different spray can for each color you intend to use. [Sandesh Manik] decided to solve this problem by building a rig that can produce a wider range of colors by mixing the paint from several cans at once. Check it out in the video below.

Art-Net to DMX512 with ESP8266

A customizable 4-digit seven-segment WS2812/NeoPixel clock for ESP8266 (WeMos D1 mini), with a built-in web UI, MQTT automation, OTA updates, and LDR auto-dimming.

At first glance, it may look like [Rybitski]’s 7-segment RGB LED clock is something that’s been done before, but look past the beautiful mounting. It’s not just stylishly framed; the back end is just as attentively executed. It’s got a built-in web UI, MQTT automation, so Home Assistant integration is a snap, and allows remote OTA updates, so software changes don’t require taking the thing down and plugging in a cable.

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This is an instant camera that uses thermal printer to print photos, the same one that prints your receipts at the store. Photos aren't the same quality as the self developing film that polaroid uses, but they do have some, uhh, charm to them, I suppose.

Building a community around a cheap ESP32 Display with a touch screen

Conway's Game of Life, in real life
When life gives you switches...

ST’s VL53L5CX is a very small 8×8 grid ranging sensor that can perform distance measurements at a distance of up to 4 meters.  [Henrique Ferrolho] demonstrated that this little sensor can also be used to perform a 3D scan of a room. The sensor data can be combined with an IMU to add orientation information to the scan data. These data streams are then combined by an ESP32 MCU that streams the data as JSON to a connected computer.

Is it digital, or is it analog?  Well it's some combination of the two! The rack driven 7 segment display is a fully 3D printed mechanical desk piece that is equal parts satisfying and bewildering.  Turn the top dial to rotate a series of 14 cams which push on a rack and pinion system to reveal a number.  Operate is manually, or add a servo motor to the back and have the thing run on it's own.

Add sheet metal panels to your project almost for free.