List of materials:
- 4 digits 7 segment with 2 x TM74HC595 shift registers. (schematic)
- HC-SR04 Ultrasonic Ranging Module (datasheet)
There is funny little usb gadget called the Blync identified by VID: 0x1130, PID: 0x0001.
It's a glowing RGB cube, but it has two defects for me:
Let's fix it.