Discrete Component FlipFlop - test-drb@ccmp.vtda.org

11 Jul 2005

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.