Hmm. "Band up" and "Band down" buttons, plus 4 LEDs for feedback. Use 5 LEDs if you want 32 bands, etc. Or, you can make a project of it and have it send it in Morse at 60 wpm.
Or, use a joystick type button. Up/down for bands. Left/right to adjust the center freq. in the band. Use however many LEDs you need to figure out where you are. ----- Original Message ----- From: "Mike Young" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Friday, May 09, 2008 4:24 PM Subject: Re: [softrock40] Encoding for Xtall > Wouldn't be easier to have Band Up and Band Down momentary buttons? > > ----- Original Message ----- > From: "k5nwa" <[EMAIL PROTECTED]> > To: <[email protected]> > Sent: Friday, May 09, 2008 4:10 PM > Subject: Re: [softrock40] Encoding for Xtall > > >> At 03:10 PM 5/9/2008, you wrote: >> >>>Sorry, Cecil, that's a bit too brief for me. Sorry, but I barely speak >>>english - BCD and binary don't come very naturally. The code I need for >>>28 >>>MHx, for example, is 1101. How does what you describe produce that? >>> >>>73, Pete N4ZR >> >> The crystal board with V2.5 software uses 4 bit switch to select the >> group and individual frequency within the previously selected group, >> so some bits do double duty. >> >> When bit 3 is active it makes the software look a bits 0,1,2 as band >> setting switches, it then remember the group you have selected until >> you change it again by pushing on the button connected to bit 3. When >> the button on bit 3 is not pushed the PIC looks at switches 0,1,2 as >> bits that determine which of eight possible frequencies in the >> previously select group is active. >> >> Bit 3 determines if the other three bits (0 through 7) represents >> frequency or group information so typical use is as follows; >> >> You rotate your switch to the group of choice (groups 0 through 7) >> You push the button that is hooked to bit 3 of the PIC then you let >> it go, that sets the group of frequencies, and the PIC remembers it. >> Now you can use the rotary switch to select one of eight frequencies >> in that group, with this scheme if you had enough free EEPROM you >> could implement 64 frequencies, or 8 groups with eight choices each. >> >> So with a 74HC147 you would have some kind of rotary switch pick >> positions 0 through 7, the output of the 74HC147 is connected to bits >> 0, 1, and 2 of the PIC, you would also have a push button hooked up >> to bit 3 of the PIC. >> >> If however you are going to re-program the PIC then all bets are off >> and the scheme will be whatever you choose, but the above scheme is >> pretty flexible and gives you lot's of choices and it's already >> programmed in the device. >> >> I hope that makes it clear. >> >> >> >> Cecil >> K5NWA >> www.softrockradio.org www.qrpradio.com >> >> "Blessed are the cracked, for they shall let in the light." >> >> >> ------------------------------------ >> >> Yahoo! Groups Links >> >> >> > > > ------------------------------------ > > Yahoo! Groups Links > > > ------------------------------------ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/softrock40/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/softrock40/join (Yahoo! ID required) <*> To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
