Rotary Band-Switch VFO Control

I now have an interface circuit with software that allows the VFO to be band-switched with a rotary switch. Using a 74HC147 priority encoder, ten HF bands can be stored and switched in (1.8, 3.5, 7.0 MHz, etc.)

Please add $30.00 to the kit price. Rotary switch kit includes instructions, 74HC147, software to accomplish the switching, and the resistors and capacitors needed to pull up the 74HC147 inputs and filter the ten rotary switch positions for switch bounce. A rotary switch and pc board are also included, as is the microprocessor set up for rotary contolled-bands.