A firecracker simulacrum running on the BoldportClub Matrix.
Here's a quick video showing it in action..
I was a bit dubious about the possibility of creating a decent firecracker animation on the 24x5 Matrix display. The additional PWM settings create another dimension, so the simulacrum is perhaps not so far off the mark.
To light the firecracker, I want to use a real fire of course;-) Exposing the LM35 to a naked flame is perhaps not such a good idea .. but it is only for a moment - enough to take the temp over 35°C
Doxygen source documentation is available here.