Discrete Component FlipFlop

[Dwight K. Elvey]

Hi
 If they are JK's, you could make a divider connected
to some LED's and use a 555 to run them.
 That symbol on them must be from some manufacture.
These might have been fro some embedded system, such
as an elevator and not necessarily from a computer.
 A machine I worked on in the service had a number
of flop boards and other logic boards ( different form
factor than yours ) but was not a computer.
Dwight


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>> >Marvin Johnston wrote:
>> >> Our annual Bazaar was held today with all the leftover stuff now at my
>> >> house ... briefly! In searching through the stuff this afternoon, I
>> >> found several boards that I couldn't identify. One is labeled "FlipFlop"
>> >> and the other "Inverter". I put up a picture of both sides of the
>> >> FlipFlop at: http://www.rain.org/~marvin/flipflop.jpg
>
>>  I also noted that I don't see any 3 lead devices? I doubt
>> it was for tubes so where are the transistors?
>> Dwight
>
>The transistors are inside the plastic pieces at each end of the board.
>The flipflop board has one on each side, and the inverter has two on
>each side. The plastic pieces are riveted to the board, so I can't
>easily see the transistor ID. I think I've checked almost everything
>now, and there are three flipflop boards and two inverters.
>