Interesting Circuits (Simplest LED Flasher) 001

[xTheTalkingZebra]

damn mine didnt flash :( was just solid

[MintEEV]

Get a better camera then I might donate. This vid is pointless since you are recording with what seems to me to be a potato without any fucking focus. Bad quality video mate and you don't even give credit to whoever made this circuit first. cappels * org : CREDIT.

[TheDragothica]

Could you build something that keeps you camera in focus?

[directcurrent10]

hey can you pls send me the diagram pf it so i can do that pls..!!pls...plsss!!!...

[blindreaper064]

Yes but how will this save me money on car insurance?

[atomicfart3514]

Does this circuit have a constant flash rate? Its difficult to tell from the video.

[chipperdoda]

Nice....but man, it's blurry!

[barbalote2]

excellent job thank you for posting !!!

[rockman142000]

can u make a circuit diagram ??? is the transistor pnp or npn ???

[youspinmerightrounds]

@rockman142000 Hi there, I have a circuit diagram for this circuit, 'How to make a flashing led (led flasher)' check that out if you like, it may help

[TheTubejunky]

Does this damage the transistor?

I've seen a few videos about this effect and was wondering if its safe to do without any damage to the transistor.

I heard the term "breakdown" of the P-N junction, safe or not?

[youspinmerightrounds]

@TheTubejunky I don't think taht this damages the transistor. Breakdown occurs where you ahve too high a current flowing across the junctions which physically damages the material making the junction so that it no longer works and always conducts. I have not been able to break any transistors using the esaki effect (but that doesn't mean I can't either)..

[ViolentOrchid]

Do you, possibly, have a circuit diagram to aid in understanding?

[youspinmerightrounds]

@ViolentOrchid Try my video 'How to make a flashing led (led flasher)' I have a circuit diagram too, might help you

[salimkhan007]

if you want flashing leds use 555 timer IC for pluse

[merq100]

this sucks

[100roberthenry]

aha..the 'negistor'....

[secreamia]

need halp, if i have a 12 volt system, and i want to use a LED that can only handle 6 volts, what do i do to make it work? does like a 1k ohm resistor work?

[ciprianwiner]

thanks alot bro

[100roberthenry]

will this work with a 2n3904...and also on 9volts?....

[MrGeekninja]

0:01

[nikulp68]

CHEERS! Same breadboard. From ebay right?

[QwertyTSecond]

I'm currently trying to get this circuit working from a 5V power supply. Same transistor, 560 Ohm resistor (which I've changed down to a 220) and 220uF cap, but the thing just won't light. Is it just a case of the transistor not receiving enough power to break down, or am I doing something else wrong?

[pocholox8]

can i use a 9 volt and pls help its not working my capacitor is 1000uf,16v my resistor is 1k and my transistor is 2n2222 my led is those standard ones not super bright pls answer asap and give me a proper schematic for this thanks.

[salimkhan007]

@pocholox8 i think you can do this just decrease your resistance value

[pocholox8]

can i change the led to a 12v piezo buzzer ?

[Antonizu]

Great work! Please, could you teach us how can you set a circuit for rgb leds as simple as it is? thank you in advance!

[kubikop]

@Antonizu I think I have an RGB LED in my cupboard. I will make a video soon for you...

If I can find it.... ;-)

Paul..

[Antonizu]

Great work! Please, could you teach us how can you set a circuit for rgb leds as simple as it is? thank you in advance!

[Antonizu]

Great work! Please, could you teach us how can you set a circuit for rgb leds as simple as it is? thank you in advance!

[fireworkfreak100]

hey man great vid!. what's the stuff that you use? tnx!

[Universalelectro]

super simple gr8 job mate for sharing thsi with us

[benjocharlie]

I understand why you have used the NPN to demonstrate Esaki's work, but just out of curiosity, if you were to use a Zener diode in place of the NPN would it have the same effect?

[benjocharlie]

@benjocharlie

Actually, i think iv misunderstood how a Zener actually works. Sorry.

[jake555timer]

i couldnt see were u hooked up the transistor

[pokerus987]

Seizure

[etchwriter]

I can't see anything in this video. is there a schematic I can look at ?

[etchwriter]

I can't see anything in this video. is there a schematic I can look at ?

[alex84csb]

kubikop

how to make it flash brighten

[TheNuclearWatermelon]

Couldn't you just use a zener diode?

[burgerking220]

whats that little thing at :53 ?

[TheNuclearWatermelon]

@burgerking220 It's an NPN transistor, but the base lead is ripped off to show negative resistance.

[burgerking220]

@TheNuclearWatermelon thanks i watched some other videos and figured it out after a few days thanks for ur help. i didnt know the base was ripped off. thanks :)

[SwanzSkate]

my led lights up but thats all? no flash

[TheNeble100]

tu pourais renplacer la résitance par une résistance variable

[awsomehighvoltage]

Works great with a 12 volt n battery.

[jordanash84]

Just Wondering, What is the donated money used for?

Thanks

[kubikop]

@jordanash84 It is used to fund electrical components, I have not made any videos for some time now, every video I make I have had to buy all the components myself and it is very expensive.

I would prefer just to make videos but I am finding my hobby to expensive. Only a few people think my videos are worth any money..... sorry I can only do so much as I can only find a limited amount of salvage or donor circuits. Hope this helps you understand why there has been little videos lately..

;-(

[jordanash84]

@kubikop Ok thankyou for your time :)

[madamerotten]

Put a resistor in series with your LED and the circuit will probably work better.

[kubikop]

@madamerotten I will try this thanks...

[ElectrocutedMinds]

@madamerotten no don't be an idiot, he must put a resistor in series with the capacitor so the avalanche effect is better (slower)

[madamerotten]

@ElectrocutedMinds A resistor in series with LED will limit the capacitor's discharge current through the LED and transistor, which is otherwise unbounded excepting the transistor's resistance at avalanche plus the LED's reistance when on. As it stands, the large capacitor may damage the LED, and possibly the transistor. So, I am not an idiot.

[ElectrocutedMinds]

@madamerotten okay you win :)

[sidebander]

Avalanche effect, breakdown of a transistors junctions. Yes, interesting and puts out a square wave. Thanks for sharing, keep up the good work.

[kubikop]

@sidebander Thanks...

[imnomy]

@kubikop could u please write down the value of the parts....i m highly interested on this one...

[sidebander]

You have the transistor in backwards. In the video he says it backwards. Reverse the transistor and it will work :)

Works well with a NPN 2N3904 transistor.

[shendon29]

Hi Everyone ,

I followed all the steps .

The LED does not light up!

I used a 2v LED.

The capacity charges to 12v and discharges but no light at all.

I confirmed it was not the LED.

Can anyone help explain if this video is not fooling people?

[kubikop]

I think you may need to use a 5v Super bright LED...

I will Never fool people.

What transistor did you use and capacitor?

Paul..

[chilliqueen2007]

Yes, I can confirm that the experiment is real. Unfortunately, different transistors flash at different resistor values. I tried the same experiment but instead of a 1 kohm resistor I used a 50k potentiometer.(make sure you start at the highest resistance and slowly wind it down until it flashes. Good luck!

[kubikop]

Nice Video!

[erichertsens]

@shendon29 why would kubicop fool people.... he is just helping out showing his stuff.

[8RR8R8]

Thanks for sharing! How come it works without the base leg of the transistor? Isn't the transistor becoming a simple diod like that? I thought the transistor needs tiny electric charge in base in terms to open bigger charge between emiter and collector ...mpaybe i'm wrong :D

[kubikop]

A diode in PN Junction the transistor is NPN Junction a guy got the nobel prize for this read the description he is worth researching....

[8RR8R8]

i'll check it--thank you!

tell me what you think:do you think it is normal that the simple 2LED flasher circuit i made(the most typical one with 2trns, 2cap, 4res, 2LEDs)is running on two rechargable batts of 2100mA for more than a week now without getting pale or stopping? i have modified a little:a white light bright LED on one side and two parallel color LEDS on the other.The colored are lit longer and blink only for a instant to let the other LED flash. Also i added a diode in par.with res

[cpfeger]

hey thanks for posting this video really appreciate it.

[rebbole]

i got it to work...very clever

[kubikop]

Thanks both...

[saraca92]

what the component

[vanjastanic]

worked for me :) thanks man, great video

[kubikop]

Thanks

[swageronyou]

you think you can post a video on how to make a circut board for a paintball gun??

[bakupcpu]

nice demonstration it seem that only 2N2222 transistor does this unfortunatly my military 2N2222A did not like it and was not working for me. great video!

[kubikop]

Thanks

Sorry to hear, Try it with higher resistors or lower Capacitors.

Paul.

[bakupcpu]

good idea ill try it this weekend!

[RupertsCrystals]

Good stuff.

Does you camera have a "Slow shutter" setting? (It may be called something else)

That may solve the strobing problem.

[kubikop]

Cheers,

but, Its a mobile Phone (N95) so what you see is what you get.....

[FORCETHETRUTH]

very good! you are very close, watch the energy from the vacuum series the answer is in there too thanks!

[kubikop]

Ill have a look thanks...

[dodoshlodo]

yeh i found this circuit a while back, its really cool! barely any amp draw either. i guess u could use it for simple timing applications, maybe even as an oscillator.

the negister is an interesting effect,.an any1 know of any other transistor besides the 2n2222 that have this effect??

[kubikop]

I Have tried a few lots work..

[AdminOnDuty]

Perhaps this schematic at [//]img131[.]imageshack[.]us[/­]img131[/]5199[/]1tr[.]gif is similar to what you have? The transistor is reverse biased but the diode is foward biased. The 2N2222 has an emitter to base breakdown voltage of 6 volts. When it breaksdown it biases the collector via the base but current does not flow frrom the emitter to the collector, instead if flows through the avalanched emitter base and the foward base collector diode junction. The transistor is not destroyed but zeners

[AdminOnDuty]

...instead. Remove brackets on the link and preceed with the normal H T T P : without spaces.

Cheers

[kubikop]

Thats the one.....

[AdminOnDuty]

As you know, an NPN measures like two diodes connected anode to anode at the base. So current will readily flow across that junction from the base to the collector. Since the base emitter junction breaksdown at 6 V non destructively at those milliamps, the transistor will allow flow from the emitter, to the base, to the collector and out through the foward biased LED. So, we have established that a 2N2222 will function as a 6V Zener diode placed back to back (anode to anode) with a 1N914 ...

[AdminOnDuty]

... diode, so together they comprise a form of dynamic resistor that decreases in resistance as current increases. It is a form of a thyristor without a gate layer. Unlike the Diac, it only works one way, and unlike the SCR it does not require a gate signal. The extra 1N914 may seem unneeded, but it offers current protection to the LED. So...replace the 2N2222 with a 6V zener and a 1N914 and it may work the same o.O

[kubikop]

Its still interesting though do not you think, Now?

A zener diode from a transistor that costs pence to buy?

If that is what is happening that is...

Paul.

[AdminOnDuty]

Yes, absolutely.  Clip the base lead and repackage it as a negative resistor with minimum conduction voltage of 6V. You then have a 2 lead component that functions as two separate devices. All you need to do then is map the on resistance curve against currrent and you can use it to offset input impedance in resonant tank circuits provided the operate in the NR range :D. Very Kewl application.

Cheers

[Lidmotor]

I was just looking at that circuit yesterday. I stumbled upon a web site that talked about the subject, the man, and the Nobel prize he was awarded for his work. Very interesting stuff.

[kubikop]

Its a nice circuit to pulse if you swap the resistor for a potentiometer.....

[janne808]

This is a neat video, but I think the effect here is called reverse bias avalanche. Tunnel diodes have a region of differential negative resistance on their VI curves due to quantum mechanical effects. There is a region where increase in voltage results in less current.

[kubikop]

Can you show me a video of this?

Thanks

Paul.

[janne808]

search for 'zinc negative resistance' here on youtube.

[kubikop]

Thats Ill have a look.

Paul.

[rroge5]

what is the current usage on this circut. i made one like this and the way that it flashed was that it shorted out when the transistor was on. i hope ur circuit isnt like this

[kubikop]

What surprised me is if you stop it mid flash the led stays like semi lit.

[rroge5]

yes.i somehow think the resistor is acting like it is an indcutor. your led isnt off for long enough so that it looks like its off.

this circuit is very interesting and i wish i could see a circuit diagram and build it just like you have.

[Drevtoobe]

Hey Paul, that's a pretty cool clip. It's a very interesting voltage waveform across the transistor. It's actually a bit puzzling in the sense that you know that the voltage across the cap is increasing before the transistor switches on, yet the waveform shows the voltage between the cap/collector and the emitter as decreasing. Part of that may be explained by the fact that when the transistor is off, the emitter connects through the LED to ground.

[Drevtoobe]

When the transistor is off the LED is also off and not conducting. This means the emitter/LED junction is almost floating and is not necessarily a stable voltage reference for your scope ground probe.

As a suggestion, but your scope ground probe on the battery ground and look at the cap voltage. You will see the cap charge up with an exponential waveform until the transistor switches on. Then you can see how fast the voltage drops and then start the cycle over again.

[Drevtoobe]

This will give you a "clearer" picture of what's going on because of the stable ground reference voltage for the scope.

You can also look at the LED voltage like this. Note that once again you have the phenomenon of the "floating" node at the emitter/LED when the transistor is off. You can overcome this by temporarily putting a 10K resistor to ground. This will "pull down" the floating node to ground when the transistor is off. If it doesn't affect the circuit, you may get a "clearer" view

[rroge5]

it may also change the frequency of the led flashing.

[kubikop]

Ill have a look over different parts of the circuit with the probes..

[37474748]

sweet rig man 5/5

[kubikop]

Thanks, It uses Negative resistance....

Paul.

[37474748]

yeah oddly that one i did understand how its working... :) you did an good job in the video... even i did understand it :)

[AdminOnDuty]

You say the cathode of the LED is connected to the emitter? i.e. reverse biased? That would indicate that the LED is tunneling (zener avalanche) If it is foward biased, then the transistor simply has to self conduct which will occur when 10 micro amps flow into the base via RF. Could you provide a link to a schematic? Thanx - Cheers!

[medi40]

Hi Paul. Nice scope shot. Try to replace the capacitor with lower capacitance. It's a good idea combining this circuit with Joul Thief. Cheers

[kubikop]

Cheers, Its always nice to see the scope it makes it easier to get the idea, look. Base line is in dead centers of scope which means the resistance is well below and just above the actual voltage.....

Paul..

[crob227]

camera picked it up fine.

good work, could you run a bifilar in series with the led and pick up a charge off of the secondary?

[kubikop]

Yes I think you can, This is where I was kinda going to go with it but I like the fact that that nothing it solid and now you have thought it too I will try it..

Thats why I like doing videos other can help, I think I might try parallel first though.

The Zero point on the scope was about .3v above whilst I was doing this so I am quite existed that It may be a way of at least lighting one LED well.... If it works we can cover a room in them...

Paul.

[kubikop]

Cheers and can you mail me a circuit diagram that you promested...

Just video it private and then add me as able to see it thats what I do to share on the sly....

Paul.