This circuit is beautiful, but it's Hard to replicate, because the working principle is based on a NDR feature that have some NPNs and is undocumented and unintended by manufacturers, because of that, every transistor will act in a different manner, even if they are from the same batch. Some will oscillate easy, some will need higher voltage to begin oscillations, and some won't oscillate at all. I advice to try 2SC945 (it usually rocks) , S8050D, and 2N2222 (the ones that use the trinegistor).
Oui, cette façon de faire est instable. Le transistor est "à l'envers" et fonctionne en mode claquage. Ce mode n'est pas documenté par les constructeur en général. Ça marche, mais le transistor n'est pas fait pour fonctionner dans ce mode... et effectivement, les résultats ne sont pas garantis ni stables pour n'importe quel transistor (NPN dans ce cas). Donc tous les montages avec "base en l'air" sont à éviter.
I've searched everywhere for this circuit as I am building a lighthouse for my backyard, and to no avail. Thanks for this EXCELLENT and simple tip. How much harder would it be to lower the voltage on this to 3.7 volts and add a solar panel and internal light sensor that allows it to come on at night? I will be using a white LED for my project.
Cool circuit. I am looking for something similar but instead of the LED going off can it be wired to where it illuminates all the time and blinks intermittently at a higher intensity?
I connected up the schematic circuit on a breadboard and it does work. When I followed your soldering method it doesn't work I'm afraid. Also I was careful about polarity of led, capacitors etc. Sorry, but as I see it, there is a problem with the soldering video. No offence intended, but the soldering doesn't seem to match the schematic.
Your assembly does not correspond to your schematic at all. Your schematic shows -ve of battery to the 1k resistor. In your assembly, you show power wire marked + soldered on to the 1k resistor. Either polarity does not work for me. Also the other end of the 1k resistor in the schematic shown is connected to the -ve of the 1000uF capacitor, and you soldered it to -ve of capacitor. Doesn't work & seems very confused. Does anyone else agree?
Gracias ingeniero! Lo quiero para una cocina eléctrica, trbabaja a 110 v ca. Que me faltaria anteponerle además yo se de un puente rectificador q R le pondria?
Nice! I just picked a C945 NPN transistor out of an old camera flash, about to construct this! Thanks! Anyone see any issue using a 2n2222 instead? Same thresholds right?
Can you add more LEDs in with those two caps? Also people this stuff is fun to do so instead of knit picking everything open up your imagination a bit. My kids like this stuff. So keep up the good work
No problem.., as long as the voltage of the capacitor exceed the power in put.. in the above video and circuit it says 12v input.. so, the nearest (lowest) capacitor voltage should be 16v or higher.. hehehe
In this circuit where the led' possittive terminal is connected you should use there the base terminal of a npn transistor via 100 ohm. And connect you leds in series to emmiter using first led's possitive and another terminal to battery nd the collector terminal to the battery's possitive terminal.
i build it. But there is a BUG. The Resistor has to be connected to the LED !!!! The painted CIRCUIT is right. But you connected it to the wrong side =)
The circuit diagram is totally wrong, the resistor is connected to LED and C2- in the circuit diagram, but actually he soldered the resistor to C1-, C2- and Emitter.....
not likely to work, this circuit works below 12v withsingle LED, though you can use a DIAC instead of the transistor for more than 60v and can use more LEDs in series
Hi please circuit diagram there is some issue. Register not as physically solder and trasister also reverse. When tested with transparent led not worki g
No, more LEDS will reduce the voltage across the transistor, this circuit works on "Esaki Effect", when the voltage across the transistor becomes greater than 8v(in that particular configuration, emitter of the BC547, (npn transistor) to the +ve), it starts conducting the current through the LED, till the capacitor discharges to a certain voltage at which the conduction through the transistor completely stops and the process repeats. So, you would also have to take a look on the maximum (9v) and minimum voltage across the transistor, we want to have a greater range for the circuit to work. You can try experimenting with the values. You will get an idea of what I am talking about in this wikipedia link. en.m.wikipedia.org/wiki/Leo_Esaki
Why is the resistor connecting directly to the positive of the battery in the actual connection but in the circuit drawing it is connected directly to the Negative battery terminal. This is all wrong.
Any NPN transistor would do(2N3904, 2N2222........). It's called Esaki Effect. This video is not the original. This guy just copied it somewhere else and simplified it to fool us. This effect even works better using a Variable risistor.
This circuit is beautiful, but it's Hard to replicate, because the working principle is based on a NDR feature that have some NPNs and is undocumented and unintended by manufacturers, because of that, every transistor will act in a different manner, even if they are from the same batch. Some will oscillate easy, some will need higher voltage to begin oscillations, and some won't oscillate at all. I advice to try 2SC945 (it usually rocks) , S8050D, and 2N2222 (the ones that use the trinegistor).
That is probably the reason I cannot make it work with electronic simulation software
Yeah...945 I think is better... And can oscillate at VH frequency
Oui, cette façon de faire est instable. Le transistor est "à l'envers" et fonctionne en mode claquage. Ce mode n'est pas documenté par les constructeur en général. Ça marche, mais le transistor n'est pas fait pour fonctionner dans ce mode... et effectivement, les résultats ne sont pas garantis ni stables pour n'importe quel transistor (NPN dans ce cas).
Donc tous les montages avec "base en l'air" sont à éviter.
I've searched everywhere for this circuit as I am building a lighthouse for my backyard, and to no avail. Thanks for this EXCELLENT and simple tip.
How much harder would it be to lower the voltage on this to 3.7 volts and add a solar panel and internal light sensor that allows it to come on at night? I will be using a white LED for my project.
led dumingu : led 3 in 1 red green white . good luck
ruclips.net/video/OWrTVEZoEYc/видео.html
very simple and good, resolve 50% of my problems in my project.. thank you
Very good...can we use BC548 Transistor
Cool effect. Remind me airport.
Cool circuit. I am looking for something similar but instead of the LED going off can it be wired to where it illuminates all the time and blinks intermittently at a higher intensity?
I connected up the schematic circuit on a breadboard and it does work. When I followed your soldering method it doesn't work I'm afraid. Also I was careful about polarity of led, capacitors etc. Sorry, but as I see it, there is a problem with the soldering video. No offence intended, but the soldering doesn't seem to match the schematic.
Your assembly does not correspond to your schematic at all. Your schematic shows -ve of battery to the 1k resistor. In your assembly, you show power wire marked + soldered on to the 1k resistor. Either polarity does not work for me. Also the other end of the 1k resistor in the schematic shown is connected to the -ve of the 1000uF capacitor, and you soldered it to -ve of capacitor. Doesn't work & seems very confused. Does anyone else agree?
Circuito simples e muito legal. Parabéns amigo! Rio de Janeiro Brasil
Tentei fazer mas não consegui, vc tem alguma dica pra me dar?
Ppp
Gracias ingeniero!
Lo quiero para una cocina eléctrica, trbabaja a 110 v ca.
Que me faltaria anteponerle además yo se de un puente rectificador q R le pondria?
Nice! I just picked a C945 NPN transistor out of an old camera flash, about to construct this! Thanks! Anyone see any issue using a 2n2222 instead? Same thresholds right?
Assuming from discharge rate I believe that Instead of led this circuit is better for buzzer .
Very nice. We can make IR strobe as well this way.
Can you add more LEDs in with those two caps?
Also people this stuff is fun to do so instead of knit picking everything open up your imagination a bit. My kids like this stuff.
So keep up the good work
Goods, thanks
I n my place, i cant found 2.2 mfd 60v..with another capcitor i can change it?
No problem.., as long as the voltage of the capacitor exceed the power in put.. in the above video and circuit it says 12v input.. so, the nearest (lowest) capacitor voltage should be 16v or higher.. hehehe
Thats a really nice effect
Mantap sob..truslah berkarya.
Sir how many bulbs can be installed in this circuit?
Nice sir
Can u please tell me that can we use this circuit in bike 12v for highway running road ?
Use for flasher? please reply
me khud ek saal se iske peeche hu taki apni splendor me laga saku
Very nice schematic drawing, What software was used to make the schematic?
Hi sir very nice
But when i use 2 or 3 led its not taking a power for blink the led
Can u please tell me how to get more power for 3 to 4 led?
In this circuit where the led' possittive terminal is connected you should use there the base terminal of a npn transistor via 100 ohm. And connect you leds in series to emmiter using first led's possitive and another terminal to battery nd the collector terminal to the battery's possitive terminal.
Thank u sir
Hi sir plz help me
can i use 1 watt LED instead of the small one..?
Can I run a 12v led with a 9v battery and still make it flash?
If using 9 volt?? Change capasitor or resistor?
Много добро обяснение за монтажа!
Will this runs on transformerless power supply
What would the circuit be like if we use BC557?
Hi nice video but can you adjust the speed of the flashing by useing a potantiometer
Yes, take a look on my channel for an exanple of that.
@@mariobv947 nothing at your channel
@@electromagic3111 ruclips.net/video/W69VaPoPoVo/видео.html
could C1815 replace for bc547 if without?
Are you sure this resistor?? Or inductor???
i build it. But there is a BUG. The Resistor has to be connected to the LED !!!! The painted CIRCUIT is right. But you connected it to the wrong side =)
This circuit needs 12,4 V... most modern Power Supply`s doesnt have that... How to use only 12 V Power supply ?
Schematic correct but doesn't match the video.
What I do for same thing with 5v version?
Bro u are superb yaar
Tech saw, que voltage usas para este proyecto ???
very nice
aap us 2.2uF capacitor ko remove krke vi dekh sakte hai, wo kam karega
Super 🙂🙂
you use a npn transistor than pnp transistor???
Can we put a little bit high volt or watt bulb
12volt pe chalega sir ye
The circuit diagram is totally wrong, the resistor is connected to LED and C2- in the circuit diagram, but actually he soldered the resistor to C1-, C2- and Emitter.....
Everything is right but resistor has to be connected between v+ and emitter
doesn't matter, both the diagram and the circuit is correct
3x2=6 as well as 2x3=6....you know what I mean!
@@anindyamitra5091 No it's not. He is not constructing this circuit using the design he is showing.
Thats a fact, but doesn't matter much, I think.
Nice project
Can we use more LEDs in series
not likely to work, this circuit works below 12v withsingle LED, though you can use a DIAC instead of the transistor for more than 60v and can use more LEDs in series
You can fit more leds in series if you increase voltage, but there is a limit.
Good video. Thanks
E com vários LEDs, teria que ser um circuito pra cada um?
Good simple projekt
great idea
Estaría bien q dieras una esplicaras de por q los dos capacitores ban uno de un lado y el otro del otro lado o no importa la poción en q los soles.
Please share how to create simple shift light in motorcycle ,
On 7000 rpm,,
Thanks
Really nice
How to make the led flash for 30 seconds and off and repeat every 30 seconds?
Should be working on 3.0 volts. It would be nice.
यह कितना वोल्ट से विभिन्न करता है
Que buenos videos👍 sigue adelante
Itu LED kedip atau LED biasa
C945 , 2.2mft/50v, 1000mft/16v, 1K работает отлично
How use it 12v battary
Does not work as a strobe, the LED remains constantly on. Checked all circuit polarities.
3,7 volt handphone battery....??
What's the power supply or battery voltage?
12volt dc
Hi please circuit diagram there is some issue. Register not as physically solder and trasister also reverse. When tested with transparent led not worki g
Transistor is meant to be reverse. But not every transistor would work in reverse mode. Some need higher voltage.
What kind of battery does it take
one would assume it would need any 12v battery as it says 12v on the circuit diagram hope this helps you
Derek Gaylard thank you
If I replace with 0805 led will it work.
Hasta cuantos leds puede conectarse en paralelo
nice video #MyElectronicsTimes
Why Transistor Basis becomes 0,7V ??? Kapacitors are closed in DC ... I dont understand that circuit. Can anybody helps me ?
Hello. It does not work for me at all and I don‘t know why. Anyone zäthe same issues? Thanks Boris🇨🇭
Please explain how this circuit works?
Search Negistor at Google.
Hello Sir kya aap mere channel par meri helf kar sakate hai kya
What is supply volt
How many volt
I want to run with IN4007 diode bridge rectifier.
is this possible
Or with 12 volt with more led bulbs
which how much voltage?
It would work with any voltage not greater than 14v, not less than 9v.
No, more LEDS will reduce the voltage across the transistor, this circuit works on "Esaki Effect", when the voltage across the transistor becomes greater than 8v(in that particular configuration, emitter of the BC547, (npn transistor) to the +ve), it starts conducting the current through the LED, till the capacitor discharges to a certain voltage at which the conduction through the transistor completely stops and the process repeats.
So, you would also have to take a look on the maximum (9v) and minimum voltage across the transistor, we want to have a greater range for the circuit to work.
You can try experimenting with the values.
You will get an idea of what I am talking about in this wikipedia link. en.m.wikipedia.org/wiki/Leo_Esaki
Sir, my circuit do not work.may I have made as per your video.
did you respect the polarity of the capacitors?
Didn't work for me either, I'm afraid.
this flashar AC or DC
im inclined to think is dc, because I've never seen electrolytic capacitors wired to ac without blowing up
Отлично
Nice
Great .
Not working
The LED is backwards in the diagram.
Punch-through effect !!
how many volts are received
12volt dc
Why is the resistor connecting directly to the positive of the battery in the actual connection but in the circuit drawing it is connected directly to the Negative battery terminal. This is all wrong.
mast he bro
what is input voltage?
Maneiro!
Wrong diagram in the video R1 is connected to anode!
Wooow will put the led at the top of my wifi antenna. Woow thn duuuuuude
how many amps consume???
About 30to40 mA
Inputnya berapa volt? APAKAH 12VOLT?
Ra jls y sob
Mbohhh,,
Nggatheli tenan pancen
led must be inverted the resistance goes on positive
KEren
Super
faltou falar a alimentacao se e 12 v ou 127v
Capacitor terminal
👍👍
Woww
Dont try to match video with schematic you will go crazy, because they do not line up.
...thats perfect, a good alternative to a slow rotating beacon! However wiring does not match the circuit diagram, and I couldn't get it to work!
Supur
Como faço pra da um pulso mais rápido tipo seta só que com pulso
Smaller capacitor
diminuir o valor da capacitância dos capacitores
How to connect (plus ,minus) mention.
А как зделать чтоб горел светодиод а не мерцал?
Через резистор подключить. И достаточно.
Any NPN transistor would do(2N3904, 2N2222........). It's called Esaki Effect. This video is not the original. This guy just copied it somewhere else and simplified it to fool us. This effect even works better using a Variable risistor.