man legit said "i drew a more professional circuit schematic" after drawing the cleanest looking hand-drawn schematic
@Misack8
7 жыл бұрын
I just loved that shot at 0:28, showing the current rising and the cap pieces flying all over. It looks like a B-movie gore shot.
@N0Xa880iUL
7 жыл бұрын
Misac Tiba ya nice XD
@stevetobias4890
4 жыл бұрын
Same, they blow really cool
@eddymison3527
3 жыл бұрын
probably from 1:01
@floatingchimney
7 жыл бұрын
Your writing and drawing is absolutely perfect.
@ajuannu2602
2 жыл бұрын
ffio
@dittilio
3 жыл бұрын
I just want to draw attention to how perfectly you explain the design methodology. Every step highlights a solution, and resulting problems. Rinse, repeat. This makes an otherwise daunting looking circuit, really just look like 4 or 5 small very straightforward circuits stuck together. Legend.
@greatscottlab
3 жыл бұрын
Thanks for the feedback ;-)
@overlordgamingLTD
7 жыл бұрын
What the hell, literally less than 20 hours ago I was scouring the internet for a good guide to short circuit protection. GreatScott couldn't be more perfect.
@unknowunknown9096
2 жыл бұрын
what if the diy go wrong and create a shot circuit
@tofufrikadelle7045
7 жыл бұрын
Electroboom needs this, considering the amount of wrongly polarized capacitors. GIMME DA METAAAA
@martandrmc
7 жыл бұрын
GIMME DA SCOPE!!!
@jainvibhore1997
7 жыл бұрын
LOL, True that :D
7 жыл бұрын
xD
@mohammadrifqisatriamas7311
7 жыл бұрын
you damn right
@SkookumChoocher
7 жыл бұрын
Oh come on, I guess you don't want to undermine the meaning of his life by some overcurrent protection circuit :)
@jrspringston
Жыл бұрын
This is EXACTLY what I was looking for and you even addressed the infinite loop question I had. I haven't done electronics in 10+ years and my brother wanted me to make him something. Turns out I've forgotten everything and it was very daunting till I came across your channel. Thank you very much!
@MohsinAli-ov5ow
6 жыл бұрын
Its pleasure to watch the way you briefly describe projects .................
@benwilson224
6 жыл бұрын
This is my fav video because its a complicated looking circuit but built and explained part by part
@BrainSlugs83
6 жыл бұрын
Wow, dude... I understood that whole schematic as you described it -- that's like the most complicated schematic I think I've ever been able to understand! -- You did really well breaking out each component and explaining it separately. -- Thanks, man! :-)
@BADALICE
4 жыл бұрын
Yes, I most certainly enjoyed the video. A year from now I'll be able to design my own circuits thanks to your instruction. I'll just toss in a comparator over here to turn that off; ... right off the top of my head. Thanks, I watch your videos almost daily.
@budandbean1
7 жыл бұрын
Love your stuff! Plus, no one could ever complain they can't read your writing either! Thank you.
@beachboardfan9544
7 жыл бұрын
You just like drawing circuits don't you? Good thing you're good at it. 👍
@MOOTech
7 жыл бұрын
I think every electronics hobbyists can benefit from something like this that's simple and reliable for circuit protection.
@skyfighter_64
7 жыл бұрын
What i read: DIY Short Circuit Ok.
@yeet1337
7 жыл бұрын
That escalated quickly.
@johnpossum556
7 жыл бұрын
Oh, you're one of them? Well we mustn't judge.....
@PyroTronix
6 жыл бұрын
Skyfighter64 o
@abuxxx3607
6 жыл бұрын
selective reading
@Israel220500
5 жыл бұрын
Mehdi joined the chat.
@farazmalik4925
7 жыл бұрын
You sir ... Are really smart with your stuff i dont understand any of this but i watch it anyway .. God bless u and keep providing knowledge like this
@RexxSchneider
2 жыл бұрын
The problem that I foresee is that with a 12V supply, the inputs of the first LM358 are sitting at around 11.4V. Unfortunately, the LM358 has a specified common mode range of only up to Vcc - 1.5V which would be 10.5V with that supply. Now, you may be lucky and find that the opamp works with its inputs at 11.4V, but it's not guaranteed. The inputs are PNP Darlington transistors with a current source in the emitters and just can't operate very close to the positive rail. Worse is if you use a lower voltage supply like 5V, when the opamp's inputs would be at 4.76V with a maximum common mode range of only up to 3.5V. The behaviour would be quite uncertain in that sort of case. The simplest solution is to monitor the current low-side. That is, you put the current sense resistor in the negative line, which is a common approach. Then the inputs are close to ground, but that doesn't matter because the LM358 (and many similar opamps) include the negative rail in their common mode range, so are guaranteed to perform as expected.
@TheOswald42
7 жыл бұрын
thanks Scott, current limiting is very important feature for testing new circuit
@insightfool
7 жыл бұрын
Your writing is so perfect! I don't know how you do it!
@bashiralao9172
4 жыл бұрын
How come I have never come across such a great channel all my years of youtubing till year 2020 You are awesome sir
@Xenro66
7 жыл бұрын
I literally never build anything GreatScott makes, since I never have the right parts, but I love knowing the information is there when I need it :)
@AjayKumar-fd9mv
5 жыл бұрын
Your schematic drawing and hand writing are awesome
@noelj62
7 жыл бұрын
Nice work. You could have connected the opamp power to the relay output to get a cut off latch. The second relay can be eliminated. For the reference voltage, you can use a 4007.
@FeverDev64
7 жыл бұрын
Am i the only one who doesnot undrstand anything but watches it Edit : i also wanted to say his videos are interesting even tho i dont understand
@AhCup
7 жыл бұрын
No, I feel lost pretty early on the video but still watch the whole thing.
@SureshKumar-nk2ok
7 жыл бұрын
i too didnt understand when i was in college later i realised the same requirement then same video understood
@cyborgsheep6077
5 жыл бұрын
nope
@mitz2156
5 жыл бұрын
Me 2 !!!
@n0username0n
4 жыл бұрын
Keep watching then mate, the more you watch and take note the more you will come to know
@jimmywang7862
6 жыл бұрын
you make the best simple, clean and well explained tutorials
@blackmesaresearch2
4 жыл бұрын
I love the videos Scott! I had to mention though that you can get short circuit protection and more all in one IC. Texas Instruments tps2h160 is a 2 channel high side switch with short, reverse, current limiting and temperature protections. Simply set the current limit with a single resistor and send logic level from your favorite mcu to the inputs. As of March 2020, it's a whopping $1.63 US.
@ToDoList
7 жыл бұрын
Really great video. I like your Quality and the Ideas. I think I will recreate it.
@JanPlaymo
7 жыл бұрын
ToDoList That s right
@nocopyrightgameplaysminecr7353
7 жыл бұрын
ToDoList I agree
@greatscottlab
7 жыл бұрын
Awesome :-)
@johnpossum556
7 жыл бұрын
On YT it is called "Inspiration" and isn't it fun when a dozen channels are INSPIRED to do the same video in the same day?
@ToDoList
7 жыл бұрын
John Possum I don't want to upload this. I thing that I Create it only for my own
@m_k_akash
7 жыл бұрын
Thanks buddy for a simple protection circuit👌👌
@greatscottlab
7 жыл бұрын
You're welcome :-)
@777armageddon
7 жыл бұрын
the last bit about using a fix resistor i believe if the supply voltage changes it will still effect a resistor unlike some zener or regulator please correct me if i am wrong
@UpcycleElectronics
7 жыл бұрын
Šƫőȓɱ КІЛջ He said "fixed voltage." ;-)
@777armageddon
7 жыл бұрын
oh...... thanks
@UpcycleElectronics
7 жыл бұрын
Thomas Cruz LM4040. Somebody is playing with the good stuff.... The challenge for this circuit is the need for an extra reference voltage. For the scavengers and poor boys like myself, a simple TL431 will work. They can be found on almost every AC to DC switching type power supply made for consumer goods :-)
@ovalwingnut
3 жыл бұрын
60 years ago you would have been a STAR at Tektronix heading up the "schematic documentation branch"... and even more legendary now :)
@martijndeman4789
7 жыл бұрын
As usual Scott is Great in his video. I love the detailed explanation.
@meclucas
7 жыл бұрын
I liked the video right away, this is a very nice project although, in my opinion, it ended up being a little too big for its purpose. But it is a very nice introduction on this topic and could be used to compare with a purpose built IC, like the LTC436x series.
@greatscottlab
7 жыл бұрын
Looks like a great IC. I will have a look at it.
@sdlion7287
7 жыл бұрын
yeah there's purpose built IC almost for everything now! But well this is a cool _weekend project_ that some might be able to built with parts that already they have.... and a good middle level electronics to learn from! (which makes a good KZitem content... I'm an electronic engineer and it's good to remember all the applications of the basic stuff!)
@davidgarrido2957
7 жыл бұрын
GreatScott! Hola soy.aficionado a la electronica...si pusieras estos videos tambien en ESPAÑOL serias el mejor canal de youtube
@eatshitgoogle
7 жыл бұрын
Great Scott's components explode in a more elegant fashion than ElectroBOOM's. Not sure if it's a good thing, though.
@waltercomunello121
5 жыл бұрын
Thank God Mehdi did never make a 400V 220uF cap explode (as far as I know).
@zippohvh
3 жыл бұрын
@@waltercomunello121 i did inside of my wall
@FurEngel
7 жыл бұрын
For even more simplicity, you can use a single channel power switch IC to provide a fixed voltage overcurrent and reverse current protection. For 500mA or 1A, I recommend the STMPS21X1.
@lvl10cooking
6 жыл бұрын
Something about that capacitor fluff hitting that meter in the intro makes me appreciate the quality of your camera work.
@teravolt1195
7 жыл бұрын
Nice circuit, perfect DIY solution and easy op-amp introduction.
@user-ww2lc1yo9c
6 жыл бұрын
you deserve 1 billion subscribers
@fredlllll
7 жыл бұрын
i got my variable lab power supply for 40 bucks from china. they arent that expensive. everyone should invest that money. they are so useful
@afonsoyoshimura3400
3 жыл бұрын
Congratulation!...your explanation is easy to understand.
@onecreativecriminal
7 жыл бұрын
Why hasn't this channel hit one million subs yet?
@Forkin
7 жыл бұрын
Simply and effective design, i am thinking about building my own copy. Thanks for sharing.
@yourboi1842
Жыл бұрын
I can finally follow these videos now
@musthofaalatas5968
7 жыл бұрын
he has the finest hand draw circuit
@MrBreak745
7 жыл бұрын
if you used a mosfet instead of the relay and let it oscillate freely then filter the output with a couple of a by-pass capacitor you could have made current limiting circuit
@jamilhneini1002
6 жыл бұрын
Yeah but relay has lower power loss
@camilomason4560
6 жыл бұрын
Jamil Hneini but relay can't oscillate fast enough for the current limiter
@jamilhneini1002
6 жыл бұрын
Camilo Mason I don't think you need it to oscillate right? Just close it when there's no overcurrent and open it when there's no overcurrent
@ganopterygon
5 жыл бұрын
@@jamilhneini1002 sorry but no, P-Channel MOSFET FDWS9509L -F085 has only 8mOhm Rdson and can handle 65A and the price is $1.46 USD while this relay is 50mOhm contact resistance for 1A with a price of $1.34 EUR , not mentioning that the MOSFET can shutdown the rail lightening fast compared with a relay, and the MOSFET is way smaller than the relay, latching mechanism can be added by using a diode as feedback in the comparator so no problem there.
@iblesbosuok
5 жыл бұрын
LM358 tends to work well on Vicm (common-mode input voltage) close to its negative supply. Vicm on circuit in this video close to its positive supply, so other type op-amps such as LF353 or LF412 or TL072 or TL082 more fit to this purpose. excellent explanation, excellent video. cheers from Indonesia
@michaelnoble2432
5 жыл бұрын
I'm surprised the circuit actually worked. The datasheet for the LM358 states the maximum input common mode voltage is 1.5V less than Vcc, which he clearly wasn't meeting here.
@JackTradeMark
7 жыл бұрын
Great video. Thank you for showing and explaining how to do this. This is one I will actually build.
@ItsJustMeMusic
7 жыл бұрын
Is this only me that watching this as a 11 years old kid and confused? But subscribed to this channel and always watch the video?
@AK90
7 жыл бұрын
I dont know why I watch these videos since I have no fucking clue whats going on 90% of the time xD But none the less, I do love watching them :D Keep up the good work Scott!
@SopanKotbagi
7 жыл бұрын
You destroyed a breadboard for us. Much respect!!
@madhevanramalingam4089
7 жыл бұрын
Thanks Scott now no one will be afraid when i turn on my circuits
@greatscottlab
7 жыл бұрын
That was my intention ;-)
@madhevanramalingam4089
7 жыл бұрын
GreatScott! Love you Scott👍😊 your videos made me choose electronics in college
@greatscottlab
7 жыл бұрын
Awesome :-)
@fatonisodiq9341
Ай бұрын
1:01 : "lets get started" (pop..) 🤣
@jordanjohnson714
7 жыл бұрын
This video seemed to make a lot more sense than other videos
@johnconrad5487
2 жыл бұрын
Thanks for sharing so much info in your videos. I always find them interesting. I have been looking for a circuit that does not use relays and does not dissipate huge amounts of power and can limit the current to some adjustable value but does not shut down the circuit. This is probably some kind of CC circuit. ACS 712 is a good choice for the current sense.
@259Euro
7 жыл бұрын
I do This! It Works! Befor this my Lab bench power suply Are blown Up!
@nickstanley5064
7 жыл бұрын
Why didn't you let us hear the capacitor exploding ?
@greatscottlab
7 жыл бұрын
I often listen to music while recording. So the explosion was not useable.
@nickstanley5064
7 жыл бұрын
Thanks for replying and great video as usual.
@CoHxBlackWebster
7 жыл бұрын
GreatScott! Q&A what music do you like ? xD
@xposurex4788
7 жыл бұрын
CoHxBlackWebster Beatles!
@LarryAllenTonar
5 жыл бұрын
Besides, due to teensy mikes and speakers, it would be a little 'snap'. Not the big firecracker-esque POP with lots of room reverberation you'd hear in person. Foley artists go to a lot of trouble to make gunfire sound like 'gunfire'.
@jimmy_jamesjams_a_lot4171
6 жыл бұрын
BEAUTIFUL PENMANSHIP!
@shinningraj
5 жыл бұрын
I really enjoy your videos. The way u demonstrates it with pen and paper. Loved it! keep posting such lovelies..
@pavelfischer5072
2 жыл бұрын
Supersložité. Pořídím si regulovaný zdroj a napětí zvyšuji pomalu. V případě zkratu protestuje Ametr.
@georggross1232
7 жыл бұрын
All starts with a bang. Nice touch.
@34Gw
6 жыл бұрын
Your soldering skill is awesome..😯😮
@mdzahid3464
7 жыл бұрын
you are pure genius bro i like tour videos so much
@jacobsoby3910
3 жыл бұрын
If you look a little closer, the first stage op-amp is a complex Wheatstone Bridge, the second op-amp can be replaced by moving the adjustment to the Wheatstone bridge.
@TinkeringWithTerrius
7 жыл бұрын
Your videos are always high quality and very informative. I was looking for a relatively simple circuit for over current protection and viola, you just happened to post a video on it! Keep on posting these awesome videos! :)
@abdelrahmanelsayed3746
7 жыл бұрын
Nice illustration!!
@DRSDavidSoft
7 жыл бұрын
This is great in combination with my DIY power supply. I think I'd also add a buzzer so when there's short circuit it would notify me with a sound
@mohammadmuwafi3623
7 жыл бұрын
what about making a video for variable current limiting circuit like lab bench power supply
@xposurex4788
7 жыл бұрын
Food Gamer فوود جيمر Already done. Check HACKED!
@mohammadmuwafi3623
7 жыл бұрын
Emmsey Square2 Seen😁
@joshuabest100
7 жыл бұрын
All I hear is stuff I don't understand but I still watched the whole video because it's great Scott 😉 dun dun tsss
@-CrippledNinja-
7 жыл бұрын
I've got few neanderthal genes. I see caps blowing up. I click like.
@MrGuiSlash
7 жыл бұрын
Wow really nice circuit! Thanks Scott!
@matthewsavin6486
7 жыл бұрын
Best GREATSCOTT vid ever. Thank you bro.
@erticyusa5928
5 жыл бұрын
My brain explode trying to follow this video
@mindaugask6160
5 жыл бұрын
Only 1 transistor is needed. 2nd op amp output goes trough lets say 10kohm resistor to transistor's base. For reset, push button connects to transistor's base and to ground. When the relay is on, voltage on current sense resistor goes to 0V therefore non-inverting input has higher voltage than inverting input. So the output will be near power supply level (depends on op amp's gain) and that makes 2nd op amp's non inverting input be higher than inverting input, so the output will be high as well. That way transistor stays on forever which makes relay turned on forever until you reset with push button.
@rev.kenshostad2888
5 жыл бұрын
I can't afford to help you with your channel, However, I didn't want to thank you for the information. You have encouraged me with your many projects, even though many times I have no clue to what you are talking about, but this will come in time... As I spend more time doing electronics, being self-taught is always a long process... Learning how to code Apps, at the same time, and many other projects... Anyway, thanks again... Keep up the good Work and May GOD Bless you and yours... AMEN...
@kungufupela
7 жыл бұрын
Your vídeos make love the electronica
@notorious3875
7 жыл бұрын
this is awsome simple protection circuit
@anandquest
7 жыл бұрын
i liked that capacitors explosion
@marino5011
7 жыл бұрын
THANK YOU i tried to make this in my diy power supply but it it worked on bread board, but not in a PCB i tried to find video's about a simular circuit but nobody made one thanks for fixing my problem
@at1562
7 жыл бұрын
great sccott is awesomEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE
@at1562
7 жыл бұрын
guys can i get 4 likes
@nieabtw
7 жыл бұрын
fuck off
@at1562
7 жыл бұрын
nut:HAHAHAHAHAHAHA whats a new joke
@lorenzospeedfast
7 жыл бұрын
aaaawwwwwwwwesome***
@Tyrone-Ward
7 жыл бұрын
aakash tahir fuck on
@SusanBell-dl5gr
29 күн бұрын
Magic smoke my speciality, have made so many versions of the magic smoke machine, maybe with this I can make something else.
@safran4588
6 жыл бұрын
Great a protection CIRCUIT for failing at soldering circuits👌
@HobbiesNTech
4 жыл бұрын
Just what i needed for my motor overload protection!! Thanks a ton !!
@mickg8340
7 жыл бұрын
This was actually the kind of video i was waiting for. About 3 days ago iv been working on a short circuit protection circuit, though i didnt use a relay. Iv been using thermal fuses, which is kinda crude, but you get the idea. Great video though 👍
@DoomRater
7 жыл бұрын
Burnt up ICs and exploding capacitors, Great Scott!
@melplishka5978
3 жыл бұрын
As always ty for your time and knowledge my friend.
@samiboulaid
7 жыл бұрын
You are the best of the best
@omsingharjit
3 жыл бұрын
5:08 clever design
@fullzys
7 жыл бұрын
You need to upload more than once a week your videos are amazing. I've been watching your videos for like 2 years and have enjoyed every video I've watched, keep up the good work it would be great to see more content though!
@greatscottlab
7 жыл бұрын
Sure, I would love to upload daily but quality takes a lot of time. This video alone took around 30-35 hours to produce.
@jparky1972
7 жыл бұрын
Thank you. I can see this being a useful addition to a diy bench power supply like an ATX psu along with a display to show the cut off values. :)
@fidelcatsro6948
7 жыл бұрын
great demo amigo! for the rest of us useless cat brainers... we still gotta use the humble fuse
@gfiveforfun
7 жыл бұрын
You are right. Electric boom need this
@Miata822
6 жыл бұрын
Great video, and it popped up on my feed at just the right time.
@MegaGreatape
7 жыл бұрын
Scott.. Thou art indeed great....
@msjaxp
7 жыл бұрын
How in hell a left handed person became an engineer with such capabilities? You are awesome dude :) Carry on
@pawef9049
5 жыл бұрын
OMG Scott, your drawing skills are amazing!
@AISC95
7 жыл бұрын
This schematic was incredibly well exlained! I admire your designs and detailed commentary. Freundliche grüße aus mexiko!!
@davidmcclare443
7 жыл бұрын
hi i would have used the second contact to break the circuit between the coil and the top of q2 and the push button across the contact that would prevent the button allowing full current while it is held (5:14)
@JulioSantos-up2gz
4 жыл бұрын
Congrats man, it's very useful!
@NeverTalkToCops1
2 жыл бұрын
Well done! Obviously, for large inrush current, a resistor is not the way to go, rather a thermistor.
@hanzmarin4655
5 жыл бұрын
Its great, but I think relay systems are slow compared to solid state switches. And also there is the problem of the Vcc powering all the devices an voltage references. Finally, there's still a current leakage going to the load.
@thilinajayasingha678
6 жыл бұрын
Very usefull for my projects and thanz to informed us to the developing paths in practicle. Thanz lot!!
@programer0713
7 жыл бұрын
You have to build 2 of them because if you make the protection circuit you need to protect that circuit to prevent high current flows if you make a mistake in the protection circuit..
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