Step 5: Final projector
Now you only need to find a place where you can put it. You should carefully choose a place with a lot of sunlight. The advantage of the used solar garden light is that it only lights up at night when the graffiti can be seen. I've tested mine on the balcony the last days but I have to say that the sun here in winter is too weak to give the energy for a whole night of projection. Perhaps I should wait till spring until I expose my projector to the street. So watch out, perhaps you will see one of these someday in Munich.