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."
