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.

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.

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

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

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

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

@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 KZfaq key words it will really help people find this upload in the future ;) -Jake

Cheapest expensive more thanks Very simple very important surkit dayagram thanks

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

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.

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

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

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.

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!

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

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

Very good video and example! Thank You!

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

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

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

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

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

Nice circuit. Good explanation. Appreciate your efforts.

thank you veery much you are amamzing

Muito obrigado pela ajuda

Thank you.but still confuse about the process.

Very very Interesting circuit without uC

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

It works!

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.

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

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

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”).

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

👏👏 Very good circuit and good explanation.

this circuit is so helpful to me

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!

Can fine the PCB layout

Please help is there any ic with that function?

How many hours led. Will on.please reply

Nice... Explanation thank you

Thanks , I have enjoyed listening to your explanation

I appreciate your efforts, good work.

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

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

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

Thanks for the help

I like it.. well explained

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

Very helpful,Thank you 👍👍👍👍👍

Has anyone figure out yet how circulation pump motor works? I know it uses gate driver in IC to drive gates in IGBT. It is 3 phase too. pump name Wilo made in sweden or something. Same shit is in those compressor heater/cooler, the fans are run by PMM thats driven by weird pwm using gate drivers and IGBT. I wan to make them run on 12 or 24v DC. Any smart person here? I could even pay if you know where to tap the pcb.

The capacitor discharge does not affect the circuit operation

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

Thankyou very much

Belo circuito

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

want to used AC220

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 .

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

Very very thanks

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.

Muy Bonita

Useful video 👍 Excellent 👍

thank you

Very nice sir.On delay timer video make & update sir.

*Any change if 5v*

but we use FETs for power switching now.....

Very useful full video lot of information!!!

Resistance #9؟

Can this be used in noisy circuits like car electrics?

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

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?

Thanks,friend!

this lady teaches in very cute voice,,,, i love this channel

can you give me PCB board pattern and mounting plan ?

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?

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

Can Bc547 Or Bc548 transistor be used

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

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

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

achive link not working

නියමයි.ඔෆ් අවස්තාවේදි කොපමන් දරාවක් ගන්නවද ?

what is the maximum current

Keep it onn......thanks for this ckt...

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

Can I use bc547 transistors

If youknew anything about switches, you could have just bought the correct switch.

capacitor 1mf but how much volt. pls tell me

i want pcb file plz

Will this work with 12v?

Can i build this circuit using KT315 and KT361?

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

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

Just use a bi stable multivibrator

sadly that's almost 1mA, that's very high power consumption even for a switch

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

Link si hablas español y solo entendiste el diagrama.

Can i use any npn&pnp transistor?

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?