Homemade 555 Timer - In-Depth Design Walkthrough And Demonstration

Homemade 555 Timer - In-Depth Design Walkthrough And Demonstration - Simply Put

Рет қаралды 4,687

Күн бұрын

You can make your own 555 timer with discrete components, using only BJT transistors (one PNP and a bunch of NPN) and some resistors.......okay, and a pair of op-amps or comparators. Listen, a homemade op-amp is not a trivial thing. I absolutely will do it...in the future. For now, this is still an amazing learning experience for a novice like me, especially when one single PNP transistor decides to go rogue.
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Пікірлер: 24

@juddery Жыл бұрын

As an older learner, I always really enjoyed your videos and unique presentation style and regularly revisit them when I want a refresher. I've noticed you've been gone a while though, so am hoping you're doing okay and hope to see you back again someday. Either way, thank you for all of your excellent content.

@sasisekharmg7823 4 жыл бұрын

Fascinating how a 50-year-old piece of technology is still widely used by hobbyists (I'm not sure if professionals still use it, toys still do mostly)! An average phone gets thrown away in 5, yet this magical chip has remained alive for 50.

@simplyput2796 4 жыл бұрын

It's a schmitt trigger, it's a d-type latch, it's a digital buffer, and it's an astable and monostable multivibrator. And includes both open-collector and push-pull output. And it can be used in any or all of these modes at will in a live circuit with creative use of switching. So yeah!

@millamulisha 2 жыл бұрын

Excited for the homemade op-amp circuit. :D

@plumber919 2 жыл бұрын

As always, your presentation was awesome! Thanks for doing these videos.

@abdulmajidabusitta7072 Жыл бұрын

Thank you

@sequri 4 жыл бұрын

An interesting exercise. Well worth doing (and documenting). I would heartily recommend anyone here to read Hans Camenzind's (the late designer of the 555 chip) fascinating book 'Much Ado About ALMOST Nothing'. He was a restless and very talented designer and entrepreneur who was also behind the introduction of phase-locked loops to ICs (565) in 1969 (with A.B. Grebene). He actually designed the 555 in 1971 on contract with Signetics, after he had left and started InterDesign, according to his son Peter. The whole history of Silicon Valley and what sprung from Shockley Semiconductor and particularly Fairchild Semiconductor (Intel for just one example) is incredibly fascinating. I would also recommend anyone here to take a look at Evil Mad Scientist's wonderful discrete "Three Fives" 555 (they do the 741 Op Amp also) timer kit.

@Tofomy 2 жыл бұрын

Like your videos, hope all is well.

@CorneliuPaulLupulet 4 жыл бұрын

Great video! Looking forward to the op amp video :)

@parapos 4 жыл бұрын

it's always interesting how "stuff" works "under the hood"...... great video!!!

@t1d100 4 жыл бұрын

Awesome and fun.

@keithking1985 4 жыл бұрын

MY GOD IM GETING COMFORTABLE FOR THIS!!!!! BIG FUCKING YES!!!!!! : )

@hardware4200 3 жыл бұрын

Very nice

@equalcrimeequaltime Жыл бұрын

You don't need the base resistors for the push-pull transistors, just a pair of diodes to bias the output signal. I love making PWM SMPS controllers from BJTs for fun. I just etch my boards. You can't use breadboards in power electronics.

@TBL_stevennelson 4 жыл бұрын

🌬 Mind up. Great video

@sadface7457 4 жыл бұрын

The 555 design is so useful but they are limited in their frequency (even though some go higher) could this design be used to have reliable design of an 555 timer with high frequency and more power.

@simplyput2796 4 жыл бұрын

I don't see why not: The frequency and power limitations would be determined by their parts, so you could always just use better parts.

@keithking1985 4 жыл бұрын

that was fucking awesome(excuse my language) its in my favorites & will be watched over and over.. If you used FET's instead of BJT's would you get the cmos version 555?????

@simplyput2796 4 жыл бұрын

Mosfets would be easier to work with, yes. Unfortunately I don't have enough discrete mosfets right now to do it, although I could use Nand and inverter gate chips instead. For digital logic gates, open collector/drain, and push-pull, BJTs and MOSFETs (CMOS configured) are basically interchangeable.

@jamiemarsden3823 2 жыл бұрын

also, what's he's doing here is extending polarity and redirecting current so it either negates or initiates current lol but why add parts to an already efficient minimalistic and simple circuit?? :/

@esra_erimez 2 жыл бұрын

Who's watching in 2022?

@asmahoseini4393 Жыл бұрын

آدم فنی ،،آدم فنی را دوست دارد .در ضمن اینکه این کلیپ خیلی خسته کننده بود ،و نقشه ای نبود که بفهمیم از اون سیم‌های شلوغ که نمیشه چیزی یاد گرفت،Ben is the best 👌,,,

@jamiemarsden3823 2 жыл бұрын

STRANGE HOW YOU OVER EXPAND AND COMPLICATE THE 555 TIMER LOL you can't get more simplified then 8 pins, 3 resistors, 2 caps and a fuse XD why is that so hard for you all to get your head around? beats me :/

@jorpese1 2 жыл бұрын

What are you talking about? It's about recreating the inside of the 555 not to use it.