For this LED Sign you will need following things:
M3x6mm countersunk screws
5mm LED:
https://amzn.to/3PBUWAx
Push button:
https://amzn.to/3Bqyaph
Switch:
https://amzn.to/3j2EUmE
18650 akku:
https://amzn.to/3YhgCWn
18650 charger:
https://amzn.to/3UUZToV
5V boost converter:
https://amzn.to/3uPZMAc
Arduino nano:
https://amzn.to/3UQhmiq
The author marked this model as their own original creation.