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posted by chromas on Thursday April 19 2018, @05:43AM   Printer-friendly
from the one-is-all-you-need dept.

Submitted via IRC for TheMightyBuzzard

A flip-flop is one of the most basic digital electronic circuits. It can most easily be built from just two transistors, although they can and have been built out of vacuum tubes, NAND and NOR gates, and Minecraft redstone. Conventional wisdom says you can't build a flip-flop with just one transistor, but here we are. [roelh] has built a flip-flop circuit using only one transistor and some bizarre logic that's been slowly developing over on hackaday.io.

[...] The single-transistor flip-flop works just like any other flip-flop — there are set and reset pulses, and a feedback loop to keep the whatever state the output is in alive. The key difference here is the addition of a clock signal. This clock, along with a few capacitors and a pair of diodes, give this single transistor the ability to store a single bit of information, just like any other flip-flop.

That's damned nifty.

Source: https://hackaday.com/2018/04/18/the-one-transistor-flip-flop/


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  • (Score: 3, Funny) by DannyB on Thursday April 19 2018, @02:40PM (1 child)

    by DannyB (5839) Subscriber Badge on Thursday April 19 2018, @02:40PM (#669115) Journal

    Flip Flops can be built from a single electromechanical relay.

    When you're up, you're up.
    When you're down, you're down.
    When you're only halfway up
    [_] You're neither up nor down
    [_] You need a different pull up resistor
    [x] Your flip-flop is broken
    [_] You're using base 3
    [_] Is a superposition of two states
    [_] You haven't had enough to drink
    [_] Viagra or Cialis
    [_] Is a topic of ongoing study and research not yet sufficiently explored

    When you're neither up nor down is when your winnings equal the amount you've spent betting so far.

    --
    People today are educated enough to repeat what they are taught but not to question what they are taught.
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  • (Score: 2) by BsAtHome on Thursday April 19 2018, @04:34PM

    by BsAtHome (889) on Thursday April 19 2018, @04:34PM (#669154)

    Ehm, why so restrictive? I think all choices are applicable.