555 Timers - Bistable Multivibrator Configuration
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- Опубликовано: 22 май 2024
- After reviewing 555 timers and their monostable configuration, in this tutorial we go over the second of the three common 555 timer configurations, the bistable multivibrator configuration. Josh reviews the bistable configuration, talks about how boring it is but still explains in great detail, moving step by step, explaining what happens internally to the 555 timer. He finishes up with a real life example using a 555 timer on a breadboard that's hooked up to an oscilloscope, showing the expected behavior in real life.
This video tutorial is based on the written tutorial that Jayesh created, so go check out the written portion that Jayesh did here: www.circuitbread.com/tutorial...
0:00 Introduction
1:33 External Bistable Configuration
3:13 Internal process explained
6:05 Summary of the process
6:48 Physical circuit and performance
7:30 Overview and summary
7:55 The toast will never pop up
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You are wrong. This was very exciting. Thanks for doing this video.
nice video, actually it is quite hard to find info this good online so ill add this to my lists
Great video.. Keep uploading.. I love these
This is extremely usefull i.e. for building lab power supplies.
You turn the PSU on, adjust your voltage and current limit and then enable the output. Advantage of the 555 is that if you turn on the PSU, the output will have a defined state.
If you just had a switch there you might end up forgetting about it and roast components, because you forgot to adjust something.
It behaves like the bistable relay configuration you see on a table saw that prevent the saw from starting on its own when i.e. a breaker tripped and you then restored power to the device.
Interesting, thank you for the additional uses of this configuration!
The bistable configuration is essentially just the operation of the 555 timer as a simple RS flip flop. A lot of its internal circuitry is deactivated by pulling pin 6 to ground. In fact it doesn't use any of the timer functionality of the 555 timer. You could also use a digital RS flip flop device instead of the 555 timer, because no analog functionality of the 555 timer is used. But interestingly it is one of the very few circuits in which the reset pin is actually used, which is in almost all other circuits pulled to Vcc.
To make a simple push on push off switch with a 555 timer is also easy. But it is rather complicated to make a push on push off switch, which can be controlled by a microcontroller by use of high or low pulses. It would be nice if someone could make a circuit which controls the 555 timer as a push on push off switch by low pulses, which can be generated easily by open collector / drain outputs or binary outputs.
Crystal clear, thank you CircuitBread. But in practice, what are the different applications of these multivibrators? When are we to use monostable instead of another for example astable or bistable. Could you make an another video for us in this matter? We would be grateful.
Cheers !
Great video but at 4:15 I think you meant you can’t reset unless voltage is high in q. Correct me if I’m wrong please.
Forgive me I see what you mean. The voltage being fed into the reset is high. When voltage feeding reset is low it will reset.
Please make all videos like that simulation
Hey Ramin! We actually have, within the last 4-5 months, decided to have a more animation-centric approach to videos so most videos, where applicable, should have more animation going forward.
اني عفت كلشي و ركزت انو حتى حضنه بشكل الاساتذه مكاعد ✌️✌️✌️❤️❤️🤣