It doesnt need to decode the tone, i will find a seperate chip to do that. BTW i wouldnt update until i have the whole character andy ----- Original Message ----- From: "Peter L. Peres" To: Sent: Friday, June 08, 2001 3:53 PM Subject: [PIC]: decoding hellscrieber with a pic > I think that a PIC needs DSP capability to decode Hellschreiber and also a > graphical LCD, or else you will be displaying only 8 characters at a time. > The display on a standard LCD will also flicker in nasty ways if you > update the patterns while they are displayed. Last, the power of the > Hellschreiber would be lost by brutal slicing in a black/white decision. > > I think that a good Hellschreiber receiver can be made using spinning > clock (propeller clock) technology and analog filters. A PIC could handle > timing and sync issues although I suspect I'd try the good old tape motor > with settable speed by hand at first. > > Peter > > -- > http://www.piclist.com#nomail Going offline? Don't AutoReply us! > email listserv@mitvma.mit.edu with SET PICList DIGEST in the body > > > -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body