One button Push On Push Off ! The simplest circuit.

[@MrStephen777]

Took a long time to actually find this circuit. Considering it's very common application, is not that good. So well done for this article.

[@willyrivero470]

I've worked with a similar circuit before with a flip flop IC but yours is simpler and more fun to do with transistors. Love it. I will try it later. Thank you! I always enjoy your good explanations.

[@izerpizer]

Awesome video! The simplest circuits are often the most interesting!

[@DimaGepard]

I did a very similar change to the R5 in order to make it working properly. Lower value made it easier for the bottom transistor to close

[@UpcycleElectronics]

@Kasyan TV The English terms most of people are searching for with this kind of circuit are "Soft Switch" "Latching Switch" "Latching Button" and "Push On Push Off" I know I have searched for and built several variants of these circuits for my own projects. Thanks for sharing. I know it can be challenging to figure out exactly what words people will be searching for in another language. It doesn't matter to me if you use my suggestions, but if you add these words to the title, description, and KZbin key words it will really help people find this upload in the future ;) -Jake

[@KasyanTV]

Thank you very much, I will use them)

[@jafinch78]

I was thinking "momentary contact switch stay on" or "momentary contact switch latching" or "latching a momentary contact switch".

[@abduwasapaih5137]

Step by step,fully xplanation,fully animation n simulation on how the latch switch working using ne556

[@ruslanvelazquez1445]

Muchas gracias, ya lo probé y funciona al 100 % 👏👏👏

[@willyrivero470]

I love you. You are my favorite electronics channel. Thumbs up!!

[@pfow2006]

thankyou for making this video to show me how to build a simple latching circuit with out having to use a relay

[@shvideo1]

Great circuit and thank you for the detailed explanation of the workings of the circuit. I learnt a lot.

[@rms-repairmainanseremban8403]

if i want to use supply voltage 24v, is there any components should be replaced?

[@walttechnology]

An answers to this please

[@jafinch78]

I am re-purposing LED lights from a broken screen LED TV and will use two 6V LED's to replace a stereo-microscope stock light where the lamp is missing. From a string of UV LED lights, I cut three LED's off to use for UV inspection. Both will use a 12V source. The latching switches I have are large and I need to see how this will fit since I have plenty of really small momentary contact switches like this from old free broken TV's. I think I can scavenge the boards stock for the other components also. I'm still debating if I want two separate latching switches or one latching (cool white LED) and the other momentary (UV). Have to see how this design fits. Thanks for sharing!

[@davidh1187]

Removed the LED and associated Resistor and the output from the Collector on the second NPN works well on digital pins on the Arduino. I did find it interesting the using a logic probe on this same output kept the output low all the time.

[@MMaheshThakur]

you guys are best. this is the best video on this topic

[@cucukapriyaji8981]

Trimakasih saya jadi tahu dari video ini betapa simpel nya membuat saklar on/off electric.. sukses buat kamu

[@markgigiel2722]

In electronics closed means on and open means off. The opposite of what she said in the video, so don't get confused. This can be done with a flip-flop and many other circuits with less power drain.

[@savvy_me]

Can you please recommend me such readymade module which is tiny and can fit inside smaller electronic components

[@albertcarpentercats]

Can you use any transistor on the circuit as long as you use the proper pnp npn type.but can you use any type of transistor to make it work.

[@RapidBoss08]

It works!

[@walttechnology]

Have you built it an confirm it worked

[@RapidBoss08]

@@walttechnology Yes

[@iblesbosuok]

Good simple circuit. Excellent video. I love it. Cheers from Indonesia

[@peaceforall6671]

How many hours led. Will on.please reply

[@Bestcuriosity_1]

Awesome circuit Thanks sir I really loved your all video Thanks for giving , sharing all your knowledge with us 😊

[@emmettturner9452]

We usually call a switch “without fixation” a momentary switch. It is only active for the moment you push it. It automatically returns to the previous state when released. Momentary switches can close when you press them (“momentary; normal open”) or when you release them (“momentary; normal closed”).

[@johnbrewer9833]

That is a very clear description. Normal open and normal closed often cause confuion

[@emmettturner9452]

John Brewer Thanks. :)

[@hungdang6333]

if i supply 15V, can i change in circuit ?

[@walttechnology]

Any answer to this question

[@omsingharjit]

Can it also be built using Opamp reducing the other passive. components ?

[@Maolana_ModiG]

Yes use 555 ic

[@que_dijo]

Will this work with 12v?

[@gajananphadte3440]

On the net, you can get a schematic for an SCR circuit having much less components with the advantage of high load current. It is 12 volts circuit.

[@vml1317]

i try one of this using irf transistors, when i make a test clicking in a high speed the transistor burn really fast

[@walttechnology]

What if I wanted to use it with a 12v or 16v, what will change

[@AntonioChile1]

Deben revisar la hoja técnica de los VT y saber si es posible usar el voltaje que desean, también se debe aumentar el voltaje de C1 para que trabaje dentro de los parámetros. Todo lo demás se mantiene trabajando.

[@collinsemedo3332]

Can fine the PCB layout

[@garysweetland32]

Can this be used in noisy circuits like car electrics?

[@sandeepverma-es8wp]

I need a reverse circuit When press the switch light disconnects when release light lit up thanks

[@alexutz987]

Just use a logical inverter on the output. I tend to use inverting schmitt triggers as they also add a slight debouncing element.

[@vybhavnag]

For NPN transistor, connect load at points 1.collector > +ve of LED, 2. Ground > -ve of LEC 3. CONNECT a button to base with a resistor to +ve of battery. You have made yourself an inverter / NOT gate. For PNP, connect load in series with transistor, and connect a button at base to ground. And also connect +ve supply to base via resistance. It works same as above NPN ckt. But much simpler.

[@chetananam475]

Nice circuit. Good explanation. Appreciate your efforts.

[@Allpractically]

Excellent Circuit design. I want to power arduino nano and turn auto off with arduino pulse. ... Is it possible to use it with arduino. Most of the circuit doesn't work. If yes, what modifications required at the place of switch

[@omsingharjit]

Very very Interesting circuit without uC

[@sangeeth_619]

Very useful circuit. Thanks and keep up the great work. 😊

[@FreeCircuitLab]

Use 555 ic in toggle mode..very less components needed....

[@marcodev3375]

Or use ttp223 touch module. Set jumper to toggle mode. Done. The module only 1/4 USD.

[@sammixon1207]

oh yeah ? , Show me !

[@abdulbasyirmohddahalan3374]

Thank you.but still confuse about the process.

[@zerodegree4471]

Can i use any npn&pnp transistor?

[@Cassette_feels]

is it posible to use abother transistor to replace the push button swtich? coz my source or signal is from arduino

[@omsingharjit]

There is one disadvantage in the circuit suppose you want to turn on the circuit using external transistor signal With High and Ground signal than it's not helpful for you .

[@NgocDangDinh]

Can you tell the current direction at the switch at two stage, 1st press and 2nd press. From you video, it seem that at first press, At the Switch, current flows from left to right and at 2nd Press, current flows from right to left. Please help explain with thanks!

[@AntonioChile1]

Hola, vea atentamente los VT, son NPN y PNP, ahí está su respuesta.

[@alexutz987]

Do you know of any such soft latching circuit as an IC package?

[@dpneber]

MAX16054AZT+T To name one.

[@JediNg135]

If you hold down the switch, will the circuit turn back off? Or if it's on, would it turn back on if you hold down the switch?

[@arnislacis9064]

Can i build this circuit using KT315 and KT361?

[@makcimenuka7904]

👏👏 Very good circuit and good explanation.

[@chikobanana4855]

Please help is there any ic with that function?

[@AntonioChile1]

NE555

[@alibirahwi8071]

thank you very much .. i was looking for this circuit... thanx again

[@SN-SHI]

Can Bc547 Or Bc548 transistor be used

[@cute_nichu]

*Any change if 5v*

[@qualiamaxwell6305]

is the circuit stable .???meaning when on off state and suddenly power goes off and on . will it still remain off ? couse i want to use it to power electricall heater so it won't accidentally turn the heater on

[@user-uk5bx1kz2k]

this circuit is for low voltage DC. I'm assuming your heater is powered with AC and that is going to add components

[@qualiamaxwell6305]

Aлександр my idea was to use power supply to power the pushbutton circuit and connect a relay to turn on the heater . Second please add standby led which will go off when the output goes high so as when one uses the circuit to turn on an appliance can see weather the device is connected to the mains correctly

[@RapidBoss08]

does the capacitor have to be polarized?

[@juniuschristianh.1693]

what is the maximum current

[@maheen-]

A D flip flop IC can be used to get the same thing without all these components. the IC is cd4013.

[@arthurharrison1345]

You will need a method for debouncing the switch, and that would invariably mean the addition of at least a capacitor.

[@maheen-]

@@arthurharrison1345 yep, a single 0.1 uf and a suitable resistor is enough.

[@Haider-u3i]

Resistance #9؟

[@SaliyaRuchiranga]

can you make a short circuit protection circuit using a op-amp ? or transistors ?

[@sundarpansam6718]

Nice... Explanation thank you

[@LuckySingh-up2vy]

How much is Resistor R9

[@MMaheshThakur]

do u sell this entire module. plz reply

[@passtheloveforward8209]

want to used AC220

[@samespinosa9098]

its ok to use in 12 volts power supply?

[@user-uk5bx1kz2k]

the concept for higher voltages is same, however resistors may require tuning

[@SuperBrainAK]

cool!! that was always something i wanted to play with making! very simple!

[@sennansennan4006]

The capacitor discharge does not affect the circuit operation

[@souciabderrazek6741]

can you give me PCB board pattern and mounting plan ?

[@Nooman62]

Hi. Can we replace the push button by a trigger from micro controller. Thank you.

[@gorky_vk]

you can replace switch with transistor or mosfet but there is no point, MC can keep driving transistor open without any help from additional circuitry so all this can be replaced by just one transistor/mosfet. Keep it simple.

[@RapidBoss08]

You are great. I hope you are doing well in your country

[@palashxm]

this circuit is so helpful to me

[@amir.victor]

Can you please tell me how to replace the led or whatever in the output with a rellay? Push button just activate the rellay and press it again release the rellay. Is it possible with this circuit?

[@vml1317]

use the second version with tip42 (or use another bc557 instead). the first version act like a "active low" circuit, as positive stay on and negative pulse come in when you turn on (it´s amazing because can drive relay modules for arduino without arduino), and the version with tip42 are a "active high" version (when you press the button, negative stay on and positive take control). Try use diode on relay if it need and check que output version with multimeter to see the working circuit

[@raimundoalcione2950]

Muito obrigado pela ajuda

[@bjl1000]

Simple is using a 555 timer to do the same thing. Or just a latching switch that doesn't use any power at all.

[@vml1317]

electronic latch switch are a savior. some special and automation circuits demand a electronic latch switch because they need command for ex: to turn off by power and when circuit come back, that switch cannot turn on again or will destroy everything. even to turn off and then turn on by the own circuit to make automation without programming too much.. i need a switch like this and this work great. 555 destroy my like with inferferences even making a shield and decoupling capacitors, and destroy a expensive work of mine because they start work by theirselfes

[@abhijitrashinkar]

I appreciate your efforts, good work.

[@SachinKumar-bd9td]

Mam please tell me the ratings of capacitor ...mean to say 1uF ......Volts

[@user-uk5bx1kz2k]

that depends on power source voltage. with source marked as 3-9 volts on schematic you can use 10v rated capacitor, while 16v is safer

[@ashutoshmahapatra562]

I like it.. well explained

[@srikanthlingala6672]

Can I use bc547 transistors

[@AntonioChile1]

si, siempre que use todos los VT de la misma linea BC tanto NPN como el PNP.

[@abarathnahapuarachchi115]

Cheapest expensive more thanks Very simple very important surkit dayagram thanks

[@tripiecz]

Why was the circuit unstable before changing the resistor value?

[@Stevenson15]

I do it but when i repress the bouton the LED won't turn off

[@Stevenson15]

Help me please

[@kryptonitecorydo7152]

why do we use two 470k resistors attached on the way to the capacitor instead of any other resistors? And what if we use another capacitor with smaller value?

[@fredlllll]

why not use a jk flipflop ic?

[@johnbrewer9833]

I wondered about that. Still interesting though.

[@aitvochon]

I think the point is, to make a simple circuit not using IC's, sorry for my english, is not my native language.

[@fredlllll]

your english is fine. its a good circuit to explain a latching circuit

[@philippeagbozo5259]

I’d like to put 12v on this circuit do I have to change something?

[@kalemiedi]

When i connect a motor instead of led doesent work why?

[@idhamkhan5175]

Capasitor eloktrolit 1uf ?volt....... ?

[@mohdanas3254]

capacitor 1mf but how much volt. pls tell me

[@TheEmpire2222]

10 or 16V

[@iblesbosuok]

Can we substitute 2N5401 with BS250 and substitute 2N5551 with BS107? R3, R4, R6 and R7 bypassed. Cheers from Indonesia

[@TecnoTrej]

How many Leds can I to connecto to out in this circuit?

[@marioalbertojimenezsanjurj3183]

I had used other kind of tests. Fortunately I understand ypur method. Do ypu hava a pdf. Of your explanation? Best regards.

[@samwelemad8518]

i want pcb file plz

[@electronic7979]

Useful video 👍 Excellent 👍

[@TEZLEONBETH]

built this circuit using "circuit wizard", its turns on but not off ???

[@raimundoalcione2950]

Thanks for the help

[@LevinoControle]

Great video and explaination!! Really easy to understand. =D Oh, i have just one question: When pressed, it stays activated for ilimited time? I've found similar circuits like this one, but they can't keep the load active for more than 5 minutes. I need one that stays on forever in my project. =D

[@Bharathdbs]

Can we use available transistors from electronics circuits like BC547 etc transistors?

[@vml1317]

i test using 2n2221 and bc 557 transistor and work nice. the original circuit (this one) use bc 547/557, but the creator use 2n* transistor because he dont have.. any equivalent work

[@florentinalexandru868]

achive link not working

[@미슐랭맛집탐방]

this. possible 12v¿

[@MedSou]

Very helpful,Thank you 👍👍👍👍👍

[@all-enelectro2133]

Can you make a video with a simple circuit for single Phase AC "Soft Start?

[@ahmadsalman1856]

thank you veery much you are amamzing

[@indunilmapa1405]

නියමයි.ඔෆ් අවස්තාවේදි කොපමන් දරාවක් ගන්නවද ?

[@bartekd3577]

Can you send the circuit?

[@willSmitt9710]

Belo circuito

[@a2saber2]

Thanks , I have enjoyed listening to your explanation

[@gaytrivishwakarma3072]

Very useful full video lot of information!!!