Simple AY ZX Spectrum Sound Interface Case

This case is suitable for housing of Simple AY - yet another AY-3-8912 sound interface for Sinclair ZX Spectrum in revision 5 [green PCB]. There is a newer version around currently rev.6 [black PCB - http://divide.cz/index.php?y=AYblack.en] which has different positions of mount holes according to information from author. I'll update the model once I get the newer PCB.

Bottom part is tighten to top by three M3x7 screws