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 At 10:27 AM 5/9/2008, k5nwa wrote: >At 07:15 AM 5/9/2008, you wrote: > > >Another consideration might be hardware related. I am planning to use a > >74HC147 to control the Xtall, but it only covers 0-9. I am trying to have > >a switch control with 9 positions, but 15 and 10 will be outside the range > >of the IC. Does anyone know of an off-the-shelf IC that does 16-to-4 > >binary encoding? I have been unsuccessful in finding one. > > > >73, Pete N4ZR > >What you need is to decode 0 through 7 and a push button for a band >switch activator. So the 74HC147 will do fine. > >Three bits is to set the frequency/band >The push button tells is to interpret the 3 bits as a band selection > > > >Cecil >K5NWA >www.softrockradio.org www.qrpradio.com > >"Blessed are the cracked, for they shall let in the light." > > >------------------------------------ > >Yahoo! Groups Links > > >
