Great project and write-up by High Voltage Fun up on Instructables.

I am a member of the local Round Table and each Christmas we take Santa and his sleigh to the streets of Shirley collecting money for local charity’s and give children a chance to meet Santa. This year with Covid restrictions we decided to offer the ability to donate by txt message or online but needed a means to advertise this while driving down the road.
At first we considered just a standard A frame sign on the roof rack but decided something more eye catching was in order. After a bit of discussion we decided a scrolling text sign mount to either side would be ideal but quickly ruled out purchasing one of a suitable size to be read at a distance on the grounds of cost.


Each Friday is PiDay here at Adafruit! Be sure to check out our posts, … // Read more: original article.