I have a tone encoder circuit board with no markings that uses a
MC68HC705J1ACDW processor to encode the tones. It has six switches to
select the tone and has five wires leading from the interface connector.
Wire colors are Red, Black, Yellow, Orange, and Gray. Can anyone help
me identify this board as to the part number and manufacturer? Or maybe
the wire functions. The red and black are probably +12 and ground, and
one of the others is the tone output, but that leaves two wires
unidentified.
Thanks - Jim
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