This project is easy and only for fun, hope you enjoy it.
This project is very easy, enclosed the PCB file and BOM List, you can easily get one.
When you have a party or friends gather together for fun, the digital turntable can be a very good tool for an Active atmosphere.
Step 1: Diagram Schematic
The circuit generates an impulse train with NE555 multivibrator and drives CD4017 to output a high level one by one.
When the key is pressed, the cycle begins. After the key is released, the LED will light slowly due to the C1 capacitor-discharge, and finally, stop at a certain LED. If the ten diodes are surrounded into a circle, a circuit similar to a random turntable can be made, which is similar to dice and is quite interesting.
Step 2: PCB File
This PCB file was edited by EasyEDA, also you can generate the file to JLCPCB to get the sample by $2 within 2 days.