what kind of flip-flop is used in 555 integrated circuits?
89541
Depending on the manufactuer - They are offered in - JK,  D or RS type.
966064
Three flops - A, B and C - A is the least significant bit.\nNew values for flops (inputs) are A', B' and C'.\nUp/down input is U - set to 1 for up\n\nA' = not A\nB' = B xor ((U and A) or (not U and not A))\nC' = C xor ((U and A and B) or (not U and not A and not B))
1074029
In electronics, "multivibrator" is a two-state circuit of which there are three kinds.\n\nA bi-stable, a monostable and an astable.\n\nThe first will produce one output pulse for every two input pulses.\n\nThe second will produce an output pulse for every input trigger pulse.\n\nThe third produces a continuous train of pulses.
794380
build a simple 555 alarm circuit. Search yahoo with "555 IC"
508995
The first integrated circuits were manufactured independently by two scientists: Jack Kilby of Texas Instruments filed a patent for a "Solid Circuit" made of germanium on February 6, 1959. Kilby received patents US3138743, US3138747, US3261081, and US3434015. Robert Noyce of Fairchild Semiconductor was awarded a patent for a more complex "unitary circuit" made of Silicon on April 25, 1961. (See the Chip that Jack built for more information.)
397650
I'm assuming you mean in the context of digital hardware.\n\nYou should browse the electrical engineering/computer engineering programs at various university pages. Some have their lectures posted online, such as this one:\n\nhttp://wearcam.org/ece385/lectureflipflops/flipflops/\n\nMIT also has open courseware (highly recommended).\n\nhttp://ocw.mit.edu/OcwWeb/Electrical-Engineering-and-Computer-Science/index.htm
1128622
Henry Abraham invented the Astable multivibrator1918. Thats the earliest i can find. Its a monostable multivibrator with capacitor couplings at both ends rather than one. It alows the caircuit to be unstable at both states so it can oscillate from one to the other without stopping. \n\nIts an easier way for implemation of two stae systems
279965
A digital circuit is based on a small number of (usually\ntwo) distinct voltage levels -- consider these high and low\nor 0 and 1.  Contrast this with analog circuits which are\nbased on a continuously variable signal.\n\nThe typical digital circuit has (conceptually at least)\ntwo states, 0 and 1, and are designed using boolean \nalgebra (think AND, OR, NAND, NOT gates).\n\nContrast that with an analog circuit, which instead\nof interpretting "high" voltages as "1" and "low"\nvoltages as "0", interpret voltages (at least\nconceptually) as a floating point number.\n\nThe circuits have very different characteristics.\nAn analog signal often has some amount of signal\nloss (think of the "hiss" from old analog phonograph\nrecords), but they degrade gradually (ie. they\nslowly get more and more noisy, but can often\nstill operate even with significant signal loss).\nA digital circuit, however, will typically have\n*no* noise because they often have error correction\nbuilt in to handle up to some threshold of signal\nloss.  However, at some point, rather than degrading\ngradually, they just fail.  Consider the difference\nbetween the older-style cell phones (which would\nsometimes get a little "noisy") vs. current digital\nsignal cell phones which are usually crystal clear\nuntil they just "cut out".  That's a common signature\nof digital vs. analog processing.\n\nFor more discussion, see the wikipedia entries for\nboth "digital circuits" and "analog circuits".
149299
The truth table is easy:\n\nABC . . . OUT\n000 . . . . 0\n001 . . . . 0\n010 . . . . 0\n011 . . . . 0\n100 . . . . 1\n101 . . . . 0\n110 . . . . 0\n111 . . . . 0\n\nConstructing the circuitry from logic gates would be a bit more work.
716762
How about using a LM555 timer, but instead of fixed resistors use a thermistor for the timing element(s).  You will have to look up the parameters of a thermistor and set up the other resistors on the 555 timer to give the operation that you want.
418365
Probably nothing but a die shrink. The "A" is the newer one, and the non "A" is going to be obsolete. You should be able to use the same programmer. For more info go to www.microchip.com
133893
Latches are devices which have no clock input and change output state only in response to data input, while flip-flops have data inputs but change output state only in response to a clock input.
127352
http://www-us.semiconductors.philips.com/acrobat/datasheets/1N4001G_1.pdf
790681
I went to the Seiko electronic components division site and couldn't find it. With 100 pins, it sounds like a microcontroller, which I don't think Seiko makes (at least not anymore). At any rate, I'll post a link to the Seiko Instruments website. You can always contact them via e-mail.
106779
A flip flop is a circuit that can "flip" to one state and then later "flop" to another. So when a flip flop is "set" it has an output of 1 and "reset" it has an output of 0. Unlike other kinds of logic gates, the flip flop "remembers" its state (not after the power goes out though).\n\nSo there are lots of ways to make these. Common practice is to use two NOR gates or two NAND gates cross coupled. However, there are other kinds of flip flops that require more kinds of gates. You can also get ICs that have a flip flop function already built in and that's the easy way.\n\nSee the link below for a light-hearted discussion
783602
Unclocked flip flops require fewer transistors and don't have setup/hold issues that clocked circuits have.
246250
A bistable multivibrator is a fancy word for a flip flop.\n\nSo there are several answers possible here. The easiest is to make the 4 transistors into two 2-input NOR or NAND gates and cross couple them (see below). Of course, that assumes by transistor you mean bipolar and not FET, but the ideas are the same either way.