Circuit Board Clock, Hard Drive Disk as Dial, Head Crashed! Unique, Awesome Combination. Cool Gadget Circuit Board Clock. Need Geek Gadget? Our Circuit Board Clock used to control a computer hard drive! Clock dial is real mirror-finished disk platter that shows a "head crash!" That incident would have rendered the hard drive useless..poor data! Get one for the "geek" in the family or for the one in the office! Artist signed and numbered "Certificate of Authenticity."