Bistable Multivibrator -Read Desc-

164

02:18:02

Here is my go at recreating a bistable circuit. 
I've had this circuit on my work space for a while and couldn't figure out why it wouldn't work. Out of the blue, it came to me that this simulator works on the principle that every component is exactly the same. Which is not the case in the real world(meaning no matter how similar two components are there are very slight differences between them).

So with all that said close the switch on the left side and wait for the circuit to go nuts, then open the switch one more amd you will have a working bistable circuit.

Any comments, criticism, questions are quite welcome.

Thanks for your time.

published 10 years ago

asabattle

10 years ago

Hey that's great you were able to figure that out. That would've driven me insane. Isn't it funny how solutions to so many different problems, often of great complexity, seem to come out of the blue? And often while doing something totally unrelated

Sine_eyed

10 years ago

Interesting circuit- I haven't seen this design before but then, there is much I haven't seen. I'm going on a hunch here and guessing that the original schematic you've derived this from, didn't have the switch. Correct?..

jdlogic

10 years ago

Yes you are correct, it did not have the switch. I had to add it as the simulator sees no slight differences in the same component values(nothings perfect). Real world: It begins to opperate(vibrate) when one of the transistors has an ever so slight difference in the construction and begins to conduct before the other, this starting the vibration.

Sine_eyed

10 years ago

Yeah, i'm hip to all that. Is just I remember the monostable you posted was really fast too- now I could be totally wrong but both topologies to me, read like they belong in a computer or maybe they're a section of some particular IC. Hmm, I can say for sure that they are not basic circuits, and they're not meant for use by people taping pushbutton switches and such..

jdlogic

10 years ago

@Sine_eyed yeah they are to be honest, they are from schematics that the class im taking. I remake them here to help understand them. Like im going to try and make a 555 timer(i have a generic schematic without any values) so I'll give that a try. I do wish though that this app had some sort of tagging(like how I used the @ symbol. Oh well. But the circuits I've posted this far are of actual circuits that I've personally seen work.

Sine_eyed

10 years ago

Oh i'm sure they do lol- I've said all along they seemed like great circuits to me, and I think it shows your aptitude that you were able to find a workaround to get your simulation model operational. I think that's great- you're doing good so far, keep it up!..

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