ATtiny-based, Surface-mount, 5x7 LED dot-matrix display board used in classes
More description over on https://hackaday.io/project/7788-nova-smt-blinky
It has also been known to be for sale on Tindie: https://www.tindie.com/products/bcoggs/nova-smt-blinky--hackable-5x7-dot-matrix-/
