DIY Short Circuit (Overcurrent) Protection (Save your battery/power-supply)

[@nowanda2nd]

Do not try this with anything other than a dinky 9v battery. This circuit works only because the short circuit current brings the battery voltage low enough to release the relay and break the circuit. If you use a higher voltage battery with lower internal resistance, it will not end well.

[@2012TheAndromeda]

Thank you for the info!

[@caseMasterxL]

It's based completely on voltage drop.

[@adamsucksatyt]

Could it work with a 20W transformer? When you load a transformer, its voltage will drop, and that's what could turn off the relay. Right? If you overload a transformer, its voltage will drop to a very low value, and that's when we want to turn off the relay to protect our transformer/voltage regulator. Even if rectified by a FULL BRIDGE RECTIFIER (ElectroBOOM) and filtered with a capacitor, the voltage will still drop if the transformer voltage drops.

[@Vaibhav_9150]

I am using 12V relay with 12V battery . When output wires are short This circuit works . But when Output wires are Long it doesn't Work

[@adamsucksatyt]

@@Vaibhav_9150 Wire resistance is limiting the current.

[@mridulsarkar9015]

Thank you for such informative videos

[@SuachuaGiainh]

Mạch chống chập rất hay 👍

[@nimeshvalesiya4377]

Sr agriculture me solar light tarp aata he usme use hone vali led circuit design bana sakte he

[@WayneTheSeine]

Smart! I assume the led's (diodes) shunt the current back the other way?

[@ailtonsouza3743]

Very Nice 👍

[@TechnicalCreativeChannel]

Thank you 👍

[@ngelanturngawurchannel5465]

Mantap protector nya slm knjung slm skses

[@bbg_uyak16]

sudah test om?

[@rogerioazevedo9968]

Is it for reversing the charger claws at the battery poles?

[@TizianoBacocco]

The relay won't open the circuit with enough current , it isn't designed to exstinguish a DC arc > than the rated amperes Do yourself a favor and buy a proper DC circuit breaker that costs less than 10€ on aliexpress

[@adamsucksatyt]

If I use a 20A relay to turn on-off a 2A load, then I should be fine

[@cristianparrillacruz7039]

Excuse me, I don't know much about electronics, but if I wanted it for 25v, would I have to change the value of the resistor? or couldn't it?

[@covertpluto]

Use a shunt current measurement resistor to trigger the relay

[@claudiomartinez3412]

Muy bueno video !! Podría ser algo asi para 220 volt AC EN UN FUTURO VIDEO !!GRACIAS !!UN ABRAZO GRANDE! !!!

[@Gw0wvl]

A pinout of the relay would be useful ...

[@dellguru5908]

MrMadjones most relays are almost identical from the bottom. Grab a relay and flip it over.

[@Recicladorcreando]

Servirá para 12 v. ?

[@gabriel-dz7zg]

Sim, só mude o resistor de 330 para um de 1k

[@MrErickpe]

@@gabriel-dz7zg bom saber

[@1miltond]

si el relay que el está usando es de 12V solo aumenta la resistencia 1k o menos

[@hamzakhan-mo4bv]

I think there is no need of connecting coil terminal with the normally open pin.

[@mrelectronicslab799]

5 volt me work Karega kya

[@koppo2.0]

I may actually try it

[@ahmedshaikh5467]

Kya Ya 220 Pur Work Kare Ga Ya 220 ky lya ap Dusra Bana Rahee ho

[@leebah9]

GREAT

[@FEJ]

The nail cutter used for cutting is my technique and prefer it over wire cutter since 15 years.

[@TotoGuy-Original]

yes but how to turn it on and off with the switch?

[@erivancarneiro387]

LEGAL FUNCIONA IDEAL PARA FONTE DE ALIMENTAÇÃO

[@konstantinpashkov3630]

Ты в место кроны поставь автомобильный аккум хотя бы, и я посмотрю как ты его будешь отключать коротким замыканием цепи. Полная некчемная ерунда. Можно собрать более правильную схему.

[@АндрейКалмык-ф8ш]

Это как я понимаю защита от кз. Ну а если выключать с автомобильным акб то можно не замыкать а плюс подавать через резистор.

[@khandual86]

Good ONE

[@Althu-blog]

Naice

[@ewertonsouza1036]

Like like like 👏👏👏👏👏👏

[@andersonamancio1289]

Hello, I want a circuit like this, but I need to support a voltage up to 30v, it supports?

[@sharojalhasan7852]

no

[@roshanking4897]

Sir why this circuit not work 24v DC

[@kushagrapal7805]

Bro agar tampo me yahi circuit lagaye toh kaise lagaye bata do Bhai jarroor

Bạn chế tạo hay quá, mong rằng bản sẽ chia sẻ nhiều video bổ ích hơn. Hãy qua nhà mình chơi nhé. Mong bạn!

[@DilippaulJsr2634]

A sarkit jitna bar on off karte hai to bar bar push button ko push karna parta hai kahe

[@ardiansfaqih4927]

Nice....

[@donhallback4585]

This only momentary drops the voltage below the threshold to hold the relay on when the short circuit causes a higher current draw. It likely won’t work with higher capacity battery banks or higher voltages. I wouldn’t use it.

Làm kiểu này trên acquy được mới hay

[@_yousefal_bekdli9615]

Nice

[@nikoverde4735]

Whit 13 Volt how much is the resistence?

[@MC_AU]

Niko Verde Resistance is Futile

[@ليثنبضقلبيربيليوفقكلمنفرقنا]

Irag Bagdad 🌹 👉 💙💚❤

[@kiransunape5630]

Can you make 230v base circuit

[@محمدالخالد-ص6غ]

Good 👍

[@mhmdsalhab8254]

Great job But that doesn't protect from a short circuit, it is simply a latch(memory) At least for a short period of time

[@fernandolima2798]

Qual a finalidade disso

[@BountyHunter100G]

Wht if i use power supply 24v 10A.. should i buy highest relay than this?

[@1miltond]

yes get a 24v relay auto parts or electronic supplier and calculate the 300 oms for 9v 24 V try a 900 oms resistor or less

[@mdjames6211]

Boss. I am by no means. Can't switch and line up at the bakery. With a little effort, you will be able to see in a little clearer way

[@2OldBoy]

Electric current is faster than mechanical moving. Before cutoff the circuit by relay electronic devices will be break down!! Worthless try!

[@yron100]

This is not fast enough for a semiconductor.For example transistor will blow first.

[@1miltond]

Not if you use a diode on the input before the relay

[@Recicladorcreando]

Works for 12 volts ?

[@TechnicalCreativeChannel]

yes dear

[@Recicladorcreando]

@@TechnicalCreativeChannel gracias amigo, thanks 😀👍

[@nikoverde4735]

Not with that resistence, I think, right?

[@andrejsl6353]

Power supply minus led voltage devide on led current. 12v - 3v = 9v , 9v/30mA = 9v/0,03A = 300 ohm

[@sheulyaktersurovy300]

Bro. 2mobile battery v3.7 I join this. Show v7.7. I use this for 4v light. But how resistor use 7.7v to 4v.

[@sudhakar_143_1]

A circuit 12v DC hai to AC light ke liye circuit banay

[@chambackalison7871]

Top

[@MC_AU]

I love the crappy soldering iron and ‘wire cutters’ !

[@azuzkharef2293]

GOOD

[@1miltond]

He is only trying to show you how is done you need to change the components according to voltage I have a variable power supply 0 to 30v DC 10A made in 1960 whit the same protection system and still work great I use it to try DC motors for cars starting motors windshield wiper and can handle lots of abuse in shorts whit 12 volts use a car relay for a power supply whit a higher voltage use a 24v relay will work the same use a higher resistor ceramic will be good 10w and a diode before the relay on the power input i don't see the necessity to use this whit a battery

[@acmefixer1]

There is not enough information to build this because the pins of the relay are not labeled. How about a wiring diagram? Thanks.

[@venukp1510]

No this circuts is not working

[@alichank]

What about 4-pins 12v relay?

[@jailbreak7750]

add buzzer

[@ВасилийРогов-я9у]

в чем файда то?

[@REALELECTRONICSTIPS]

For you

[@rps276]

Support

[@koppo2.0]

Almost like a GFCI

[@ritaisabel8665]

Good

[@viciriucandreea5835]

Ok ok

[@vanderleidortaperon1670]

For AC 220 Volts 60 Hmz

[@feelyour2338]

👍😜

[@ДмитроПятницький]

I hate when you are, I mean folks, make technical video without normal electrical circuit. Where is contact of relay coil? Please add circuit.

[@sanasafg1887]

Ok

[@klong4128]

The Title is extremely miss leading ! When I first saw the ' top secret pattern copyright ' without circuit diagram ,I wonder how simple 'relay' can replace expensive PCB 'overcurrent/overvoltage' circuit design. Many people asking for circuit diagram and the price . But the 'fake Inventor' keep on Coverup and never reply!! Many electronics layman admired and treat the inventor as SuperHero ! The inventor should change their Miss Leading Title .Then the Experts will respect him to sell his idea !

[@michaelschenatti6410]

What about the power consumption??? 9V battery would discharge in less then 10 hour just closing the circuit with no load. Not impressed, bad solution

[@leomoura7677]

Como seria em 220v?

[@marcbottger1656]

oh man....... this is just an Voltagedrop off switch xD if you had an Liion Or lipo this shit will melt together (in the relay) so this ist just crap... works but works shitty

[@nixon-p5y]

О чем это..?

[@ВаняИванов-ц6к6э]

Тоже что то не понял...... схем с автоподхватом на одном или двух реле полно, и известны они уже лет как 20......

[@abdessamed28]

fuse is much cheaper

[@ВикторЕ-с4й]

На 220в коротни

[@AN-yn9xp]

Никчемная штукенция

[@tz580]

LOL) your "short-circuit protector" is actually shorting the battery, when relay is in NC-state. The over-current may heat-up and blow-up the battery just in your face, my little Indian engineer))

[@kamiron2007]

No analysis no data sheet of this project , this is a highly dangerous project if used rather than this battery. Failed to understand why people put this kind of projects here just for the sake of view or what وئی تجزیہ اس منصوبے کی کوئی ڈیٹا شیٹ نہیں ہے ، اگر یہ بیٹری کے بجائے استعمال کیا جائے تو یہ ایک انتہائی خطرناک پروجیکٹ ہے۔ یہ سمجھنے میں ناکام رہا کہ لوگ یہاں صرف اس طرح کے منصوبوں کو صرف خیالات کی بنا پر یا کیوں پیش کرتے ہیں

[@ИгорьЗалозный-к8ч]

нихера не понял как это работает!

[@x-ray6067]

Такая же херня..

[@Yupitrer]

Та херня это. При кз проседает напряжение и реле отключается. Но если взять нормальный акб то эта схема сгорит вместе с реле и акб

[@SergiyRadonezhski]

@@Yupitrer нет, просто реле вспыхнет ярко, а АКБ будет в КЗ на это короткое время, а потом ничего.

[@ИгорьЗалозный-к8ч]

@@Yupitrer с проседанием акб согласен. ты мне обьясни как при таком подключении вообще светят светодиоды?)))

[@ИгорьЗалозный-к8ч]

@@SergiyRadonezhski именно красный светодиод как может светить при таком подключении?

[@raymondvaz3497]

9v supply and 12 v operational relay . this is idiotic

[@konstantinpashkov3630]

🤦‍♂️

[@gabriel-dz7zg]

One 12v power supply + this circuit + voltage regulator!

[@clintestood5839]

Nice