¶ LED-Clouds Overview
Based on the tr33 project.
There are currently 8 LED-clouds installed at xhain.
The clouds contain an ESP32 each(!), which is flashed with this software: https://github.com/xHain-hackspace/tr33
The user interface is the same device as for the tr33, i.e. a raspi running this software: https://github.com/xHain-hackspace/tr33_control
To flash the software onto the microcontrollers we use Code OSS.
¶ cloud locations and numbering at xhain
¶ Hardware
Each cloud is made up of two paper laterns, preferably two different sizes, covered by B1 (fake) cotton. There are holes cut into the sides of the laterns and they're connected with wires. This way a LED-strip can be put inside, randomly covering the full length of the cloud. The electronics are inside a small lasercut acrylic box inside each cloud.
The clouds will be upgraded to consist of 2 LED stripes each. Currently there is 1 LED-strip 3m long with 30LEDs/m (i.e. 90 LEDs per cloud). The strips are WS2812 running on 5V and need a (plastic) cover to not create any shorts with the wires from the paper lantern.
The ESP32 is on an esp32doit-devkit-v1 board (with WIFI).
The control pin (pins 14 and 32) from the ESP32 is wired through a level shifter (SN74AHCT125N), which shifts the 3.3V up to 5V, which is then wired to the LED-strip.
Three clouds are currently powered by a common 5V power source.