I am interested in building a "selector" gadget for devices that take
>jumpers
>to select a program, such as this game cartridge where you have 5
>jumpers
>to select program #0-31 (the jumpers represent the binary number):
>
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>
>The selector would have two 7-segment LEDs that display the currently
>selected program number (0-31), and a couple pushbuttons (+/-) that
>let you
>increase/decrease the program #. The device translates the number
>into
>binary and turns on/off the appropriate switches or relays which are
>attached to the jumpers on the device (ie the above game cartridge).