This 'negative resistance' oscillator uses the transistor's emitter to base in breakdown mode, which is to be avoided because it degrades the transistor. This circuit is never used in any mass produced equipment because the transistors are not tested and were not designed to be used in breakdown mode. It must be avoided to prevent damage.
@Acme Fixer: I don't think so. Assuming the LED chokes 2V, then breakdown voltage of the transistor is max 10V, so max current thru C-E is 70mA (limited by 150R resistor), not enough to kill the transistor.
@@SixOThree capacitor charges itself through battery, and transistor consumes capacitor's energy and convert the electrical signal to turn on the led, as much long power is hold by capacitor, led will be "On", once capacitor is fully discharged led turns "off" and capacitor charges itself again, and the cycle continous to infinity, that's what we call "blinking of led" the purpose of resistor is to glow led without burning it
Let me try to explain how it works. By RC = t, 3.3k resistor and 100u cap forms a time constant around 0.33s. When the cap just be charged, voltage of cap is lower than the acceptable reverse voltage of the VCE of the transistor. CE of transistor keeps open circuit then LED is off. However, once the cap voltage reaches over VCE, transistor becomes short circuit. It turns on the LED and also discharge the cap at the same time to complete one cycle operation. However, this circuit just works in high power supply voltage and the transistor may be damaged after a long time operation. To make this circuit more reliable, the transistor can be replaced by a zener diode, then using a NPN transistor which drives from the net between zener and LED to discharge the cap.
Collector is on the right side and emitter is on the left side; I think you need to switch the C and the E on the video. I never knew a transistor allows current to flow without any current to flow through the base.
@@davidjohnston5329 - I looked it up and this transistor is being operated in a "avalanche relaxation oscillator circuit". Many transistors can be damaged by this, but it's still a neat trick.
If that cell is a Li Ion cell, it needs to have a bms chip to avoid excessive discharge which would risk explosion or fire. They can be had even for a single cell, and are very cheap. A couple of dollar "insurance policy" can avoid those risks.
Someone has probably already answered this I'm sure, but isn't this avalanche pulse generation? The transistor rapidly conducts current when the voltage across the capacitor reaches the collector-emitter avalanche voltage. I thought the capacitor in an avalanche pulse generator had to be small to keep the energy from causing the PN junction to fail? Does this having the emitter connected to the positive plate, instead of the collector, have something to do with keeping that from happening?
@@joeycarr1398 The circuit here only works with battery voltage above the transistors reverse breakdown voltage, which is something like 5V. (Note that the transistor is connected in reverse polarity on purpose for the circuit to work) Also the timing is highly dependant on the supply voltage. Thats why sawajiri100 suggest a different resistor value of 2.2K to still have a decent blink rate on a 2S battery. A 1S battery in the RC hobby world is one 3.7V cell LiOn battery, hence a 2S battery is 7.4V.
This will work perfectly on my Airplane ✈️ models. Can you please show me how to make the same thing but a double strobe ? Shown on the ends of the wings of a 747-8 Jumbo.
Wow , you are very generous giving us all those informations (meaning all your projects).For an 50 W (maximum) led outside projector with sensor, what modification should I do?Thanks.
I think that 12V supply charging the 16V capacitor and when it discharge the bulb is blinking. but durring charging there's no current flow through bulb because of resisters.
LOL I just posted a comment about this too, it's an RC circuit anyway, but the base is exactly what makes a transistor, a transistor, an electronic switch, so WTF? LOL
That's a nice simple timer circuit. Let's see it on a little circuit board instead of this "mid-air" style of construction. It's kind of cute, but if I'm mounting three of these to my RC plane, I'm looking for stable mounting, not a floppy gob of parts. Or do you pot it in RTV for rigidity?
As a gift to all Amateur and Professional Electronics artisans, working boardless has advantages. Minimalist designs are beautiful. I wonder only why force 12V on us ?? 6V or less won't work ?? A pair of Crafters wire bending pliers might be a GODsend. Two pair even better.... one smaller, one larger ?? Another tip ... the Weller pen version of soldering iron works nicely with EXACTO BLADES.... cutting shapes and openings in plastics, shall never be gory. Be Careful... Cuts and Cauterizes too !!
Thanks for the Video. I wonder how the circuit works when no power is on the Base of the transistor,so the citcuit between C and E is open permanently.. can you help me understand? Greetings
actually the circuit abuses the negative resistance factor in all transistor to produce the blinking effect. Here a common NPN transistor is used. When Switched On the 3.3K resistor charges the 100uf capacitor until the voltage become high enough to get emitter-base junction to avalanche. At this moment the transistor turned on quickly and the capacitor discharged by led through 150ohm resistor, and when voltage across the leads fall, the current stops, then the capacitor again starts to charge through 3.3k resistor. Thank you
Us Motorcycle guys need help with these. Can you use the clear LED and focus it with a lens so we can put this on the front of our bikes for visability.
@@santanusaha2241 It is in fact the NPN transistors REVERSE breakdown threshold voltage that causes a current flow and avalanche effect to discharge the capacitor through the LED. For general purpose type silicon signal transistors, the reverse breakdown voltage is in the region of 5V - 6V.
Cierto. Carga de C a través de 3k3 que determina junto con valor de ruptura la frecuencia de oscilación. Pico de descarga de C a través de la otra rama al alcanzarlo. Se obtienen unos pulsos extraordinariamente estrechos.
Yo nunca lo he implementado así que no sé cuanto tiempo podría funcionar. Los fabricantes no dan información acerca de este modo en las hojas de características. Yo creo que no es perjudicial a estos niveles y se puede hacer un cálculo térmico sencillo. Que yo sepa la conducción por avalancha no es destructiva si se limita la potencia. En este caso es fácil ver que la potencia es muy inferior a 40mW (suposición de que la tensión y la corriente fuesen máximas todo el tiempo lo cual no es cierto ya que son pulsos muy estrechos; parece que brilla más tiempo del real por el tiempo de respuesta de nuestro sistema visual). Estes transistores soportan muy holgadamente esa potencia. Si bien los picos podrían ser destructivos incluso sin aumento de temperatura, estos picos son de solo unos 4 mA. Por otra parte, he visto videos con niveles de tensión en torno a 100V con otros transistores claro, puedes invesigar...
Can anyone here how the set up would look like if I wanted to use more LEDs, for example 5 or even 10 without having to make the whole thing over and over again. I want to make a warning light for a gate.
I had already contructed the circuit with VRs too instead of Resistors to observe the blinking effect and is working fine but very strange fact I could notice but couldn't find the exact logical reason behind the issue. When I use ordinary BC547 the circuit works fine but I used the same transistor from leading manufacturers the circuit even didn't start and each and everytime same result obtained. Can anybody let me know the reason??? Thanks in advance.
I have all the parts and hooked up. No strobe effect. Followed instructions as indicated on your UA-cam video. Please advice as to what I'm doing wrong. Very much like to have a few of these to light up my model StarTrek Starships. Thanks for your time, Jim.
Hola el montaje no esta igual que el esquema del circuito, por ejemplo el led va directo al colector y en esquema va a traves de la resistencia de 150 Ohmios
I tried this circuit on bread board. Didn't work. Checked connections again and again. What could be the problem? FYI i am applying 9 V instead of 12 as mentioned in the diagram / video
' that nice idea... can do that work with 6 volts batterys... dont need 12 volts... what size of LED 3mm or 5mm... what BC547 to do with middle pin between C and E
Thank you for the video. I am nubie in electronics, I tried and did like what you showed, but it worked only if I touch the led's plus pin with one of the multimeter needle. May I ask what seem to be the problem?
Check the soldering if you do not have much experience in soldering .Erratic behaviour of the circuit is possible in case of wrong or loose connection.
This 'negative resistance' oscillator uses the transistor's emitter to base in breakdown mode, which is to be avoided because it degrades the transistor. This circuit is never used in any mass produced equipment because the transistors are not tested and were not designed to be used in breakdown mode. It must be avoided to prevent damage.
@Acme Fixer: I don't think so. Assuming the LED chokes 2V, then breakdown voltage of the transistor is max 10V, so max current thru C-E is 70mA (limited by 150R resistor), not enough to kill the transistor.
03:05 I would suggest a 1N4007 in series with the 3K3 Ohm resistor sothat )I electrolytic capacitors could be safety used.
This guy is making real things,and he even answers to questions to explain his projects.for that reason.I subscribe.
Thanks very much
Where is his explanation on how this works?
@@SixOThree In the circuit diagram.
@@SixOThree capacitor charges itself through battery, and transistor consumes capacitor's energy and convert the electrical signal to turn on the led, as much long power is hold by capacitor, led will be "On", once capacitor is fully discharged led turns "off" and capacitor charges itself again, and the cycle continous to infinity, that's what we call "blinking of led" the purpose of resistor is to glow led without burning it
Is it possible using three or two light?
Let me try to explain how it works. By RC = t, 3.3k resistor and 100u cap forms a time constant around 0.33s. When the cap just be charged, voltage of cap is lower than the acceptable reverse voltage of the VCE of the transistor. CE of transistor keeps open circuit then LED is off. However, once the cap voltage reaches over VCE, transistor becomes short circuit. It turns on the LED and also discharge the cap at the same time to complete one cycle operation. However, this circuit just works in high power supply voltage and the transistor may be damaged after a long time operation. To make this circuit more reliable, the transistor can be replaced by a zener diode, then using a NPN transistor which drives from the net between zener and LED to discharge the cap.
I agree with the zener diode. the transistor isn't doing much other than acting like a diode. base isn't being used switch it on/off.
That's what I looking for :D explained very well and without this shitty music. Thanks [°√•]
Do you have a schematic of that? Thanks!
All these fun little projects on youtube make me want to invest in some tools lots of tools
I love the ideas and I really like it! Simpoe and easy! Thank you.
But, is there a way to power on in 3v-3.7v battery? What changes will be needed?
Perhaps we could skip making music videos and actually explain stuff by talking?
English may not be his first language.
No need for the talking but no music I agree on.
Then get assistance from someone who is a native English speaker. The vast majority of people watching youtube speak English.
I agree
@@erbenton07 r u fu....in' nuts?
spanish is , actually😝😛😝😛
go get a forest and get lost ! 😁😁😂😂
Collector is on the right side and emitter is on the left side; I think you need to switch the C and the E on the video. I never knew a transistor allows current to flow without any current to flow through the base.
Not on a BC547, it's opposite of a 2N2222 from what I've seen online.
your presentation skills are getting better. nice little project.
Changing the value of the capacitor alters the time constant increasing or decreasing the rate of flash.
Hey, the music is repetitive and annoying. Every dam video has the same distraction. But good work 👍
So? Turn it down or off! 😕
True.
That looks great! Excellent strobing effect! 🚨👍🏼
If I gonna use this in a 2v led strip what value of capacitor and resistor will I use?
It would have been nice if you had explained why it works.
That looks like an Esaki oscilator you can check it out
@@cosmogrid - Thanks for that info. Transistor saturation is pretty cool.
Thanks for that, my limited knowledge of electronics didn't help me understand how this circuit worked.
@@davidjohnston5329 - I looked it up and this transistor is being operated in a "avalanche relaxation oscillator circuit". Many transistors can be damaged by this, but it's still a neat trick.
Good content bro, love from kerala
ഹായ് 🤪
If that cell is a Li Ion cell, it needs to have a bms chip to avoid excessive discharge which would risk explosion or fire.
They can be had even for a single cell, and are very cheap. A couple of dollar "insurance policy" can avoid those risks.
Someone has probably already answered this I'm sure, but isn't this avalanche pulse generation? The transistor rapidly conducts current when the voltage across the capacitor reaches the collector-emitter avalanche voltage. I thought the capacitor in an avalanche pulse generator had to be small to keep the energy from causing the PN junction to fail? Does this having the emitter connected to the positive plate, instead of the collector, have something to do with keeping that from happening?
Must be tray to make this ideas. Love it 👍 and Thank You 🙏
Working fine... someone please explain why the base terminal is not connected to the external circuit.
Bought an airplane to take that transistor out and complete this video tutorial
12v led use kr skte hai....
Always connect the negative terminal from the supply first to the circuit :-)
Why? Lol.
This is not 10000v 100a supply
@@JamilKhan-hk1wl Not necessarily. Even a 5V supply is enough to burn your components and damage your board.
@@imtheroboart not if there is current limiting resistors
Jamil Khan Wait, you’ve never seen a resistor flash-fry? 🤨
Can be use for RC PLANE nice 👍
Hhahahah 😂😂 input 12v rc main kahase layega re baba
@@learnmore6760 change value of resistor from 3.3k to 2.2k ohms for 2S Battery 7.4V
WHY NOT?
@@tylerjames1716 fuck off your market style. Money? You can build from scratch noob!
@@joeycarr1398 The circuit here only works with battery voltage above the transistors reverse breakdown voltage, which is something like 5V.
(Note that the transistor is connected in reverse polarity on purpose for the circuit to work)
Also the timing is highly dependant on the supply voltage.
Thats why sawajiri100 suggest a different resistor value of 2.2K to still have a decent blink rate on a 2S battery.
A 1S battery in the RC hobby world is one 3.7V cell LiOn battery, hence a 2S battery is 7.4V.
A very nice work. I have a question! Can we burn more than one led diode with this circuit or a different circuit? Thanks.
If same question how many led can be added to this circuit?
Avalanche breakdown.
Nice illustration.
sir pls explain how its avalanche breakdown
Great, is it what I was looking for, how many LEDs can be connected to this system? How many volts does it work with?
Can you make it 10watt led strobe lights
This will work perfectly on my Airplane ✈️ models.
Can you please show me how to make the same thing but a double strobe ? Shown on the ends of the wings of a 747-8 Jumbo.
I follow this idea last night but it doesn't work... I'm so sad
me too, 2 time try, but still doesn't work, sad too
COOL . SIMPLE E MUITO BEM EXPLICADO E MONTADO . PARABÉNS . VALEU
Wow , you are very generous giving us all those informations (meaning all your projects).For an 50 W (maximum) led outside projector with sensor, what modification should I do?Thanks.
No work is small. Happiness is similar if we succeed in making small projects or big rocket.
What if I want to have a super bright strobe? Can you do a video on that?
I like the old Method by using a Voltage Multiplier Circuit, then you can flash a LED even with a AA/AAA (rechargable) Battery
Can u give the link for that video
I think that 12V supply charging the 16V capacitor and when it discharge the bulb is blinking. but durring charging there's no current flow through bulb because of resisters.
The base of the transistor ar not connected how it will work
I am thinking same... 😁😁😁
LOL I just posted a comment about this too, it's an RC circuit anyway, but the base is exactly what makes a transistor, a transistor, an electronic switch, so WTF? LOL
I really like your ideas. How to do a circuit like this with 15 reds LED and 12v supply? Thanks
Not possible
That's a nice simple timer circuit. Let's see it on a little circuit board instead of this "mid-air" style of construction. It's kind of cute, but if I'm mounting three of these to my RC plane, I'm looking for stable mounting, not a floppy gob of parts. Or do you pot it in RTV for rigidity?
Are you saying that you have the ability to build an RC plane, but you can't figure out how to stabilize a few electronic components?
The ultimate transistor burning machine.
Can i use it for 9v ?. and im gonna add 3 LED's at the same time , it will work ?.
As a gift to all Amateur and Professional Electronics artisans, working boardless has advantages.
Minimalist designs are beautiful. I wonder only why force 12V on us ?? 6V or less won't work ??
A pair of Crafters wire bending pliers might be a GODsend. Two pair even better.... one smaller, one larger ??
Another tip ... the Weller pen version of soldering iron works nicely with EXACTO BLADES.... cutting shapes and openings in plastics, shall never be gory. Be Careful... Cuts and Cauterizes too !!
How to increase / decrease the time between two flashes?
Thanks for the Video. I wonder how the circuit works when no power is on the Base of the transistor,so the citcuit between C and E is open permanently.. can you help me understand? Greetings
actually the circuit abuses the negative resistance factor in all transistor to produce the blinking effect. Here a common NPN transistor is used. When Switched On the 3.3K resistor charges the 100uf capacitor until the voltage become high enough to get emitter-base junction to avalanche. At this moment the transistor turned on quickly and the capacitor discharged by led through 150ohm resistor, and when voltage across the leads fall, the current stops, then the capacitor again starts to charge through 3.3k resistor.
Thank you
@@TechIdeasAG Thank you very much:-) that helped me :-)
If you wish to have Tesla's inspiration turn off sources of noise when you work.
Very well commented, bro! 100% agreed!
Oscilador por saturación a ruptura o vavalancha, ¿es cierto? Buen video, gracias.
Hey how can I blink my 220f tail lamp like the same way, can I use the same circuit directly to a12 volt dc battery of my bike..?🤔
Use realy
saved it for watch later bro nice!
Us Motorcycle guys need help with these. Can you use the clear LED and focus it with a lens so we can put this on the front of our bikes for visability.
how does it works? without triggering base?
Hi , i have a doubt that how transistor switch power without its gate terminal trigger??
same doubt here...
Forward breakover voltage is breaking the depletion layer and thus current flows.
@@santanusaha2241 It is in fact the NPN transistors REVERSE breakdown threshold voltage that causes a current flow and avalanche effect to discharge the capacitor through the LED.
For general purpose type silicon signal transistors, the reverse breakdown voltage is in the region of 5V - 6V.
@@CXensation Thanks a lot for explaining. Your explanation is 100% correct.
I went back to the video and sure enough the gate is free. 1st time I see that I haven't seen it in laptops.
Oscilador por saturación a ruptura o avalancha, ¿es cierto? Buen video, gracias.
Cierto. Carga de C a través de 3k3 que determina junto con valor de ruptura la frecuencia de oscilación. Pico de descarga de C a través de la otra rama al alcanzarlo. Se obtienen unos pulsos extraordinariamente estrechos.
@@ivanperezs Gracias Iván. Por cierto, ¿no acaba dañándose el transistor?
Yo nunca lo he implementado así que no sé cuanto tiempo podría funcionar. Los fabricantes no dan información acerca de este modo en las hojas de características. Yo creo que no es perjudicial a estos niveles y se puede hacer un cálculo térmico sencillo. Que yo sepa la conducción por avalancha no es destructiva si se limita la potencia. En este caso es fácil ver que la potencia es muy inferior a 40mW (suposición de que la tensión y la corriente fuesen máximas todo el tiempo lo cual no es cierto ya que son pulsos muy estrechos; parece que brilla más tiempo del real por el tiempo de respuesta de nuestro sistema visual). Estes transistores soportan muy holgadamente esa potencia. Si bien los picos podrían ser destructivos incluso sin aumento de temperatura, estos picos son de solo unos 4 mA. Por otra parte, he visto videos con niveles de tensión en torno a 100V con otros transistores claro, puedes invesigar...
Thank you so much, it's thanks to you that I did what I wanted
12v light use kr skte hai....
I have personally built this exactly as shown in the video with the same components and it doesn’t work I think it is B.S. to be honest
Now i am going to make my own home made plane with strobe light😅
Can anyone here how the set up would look like if I wanted to use more LEDs, for example 5 or even 10 without having to make the whole thing over and over again.
I want to make a warning light for a gate.
I had already contructed the circuit with VRs too instead of Resistors to observe the blinking effect and is working fine but very strange fact I could notice but couldn't find the exact logical reason behind the issue. When I use ordinary BC547 the circuit works fine but I used the same transistor from leading manufacturers the circuit even didn't start and each and everytime same result obtained.
Can anybody let me know the reason???
Thanks in advance.
How to adjust the speed when blinking?
Love the strobe!. Can you provide materials and steps to make it? Also Can you adjust speed (make it slow) blinking? I am subscriving.
Very simple and nice
hi. I need this strobe light but powered by a 2s lipo, 8,4 v fully charged. It will work?
Thanks
Bloody fantastic thanks
Nice video! Can you explain how transistor switchs on and off without variation of potential on its gate?
Its fantastic! Many thanks!
I have all the parts and hooked up. No strobe effect. Followed instructions as indicated on your UA-cam video. Please advice as to what I'm doing wrong. Very much like to have a few of these to light up my model StarTrek Starships. Thanks for your time, Jim.
Ok, you've done alright, now just increase the input voltage to about 13.5 to 14 volt.
I figured another way. Put the 150 ohm in place of the 3.3k. Then removed the 150 ohm and put a 75k in it's place to run off of 12v.
good evening you liked the green led. great videos happy New Year
Good morning very good Bhai kya ise hum bike pe chala sakte hai
Ofcourse
Cannot get how current goes through the transistor from collector to emitter with no base feeded.
Can we make this to blink every 10 seconds?
Hola el montaje no esta igual que el esquema del circuito, por ejemplo el led va directo al colector y en esquema va a traves de la resistencia de 150 Ohmios
hi did you use a normal led diode at 2.5 or 3 volts or 12v
Can i use led strips at 12v?
12v led wouldn't work
how can I make one for 5 V input ?
I tried this circuit on bread board. Didn't work.
Checked connections again and again.
What could be the problem?
FYI i am applying 9 V instead of 12 as mentioned in the diagram / video
Can I reduce the input v by removing the resistors?
Will not work below 12v
Not working...
What does a resistor doing in the circuit ? I know it resist the current. But how is it helping the circuit ? i really wanna know
4 led lagau to support kr jye gaa?
What are the requirements for 24v dc pls comment
Any problem of changing Supply volt...
Can use 3.7v, 7v, 9v, is it work correctly...?
Plzzz rplyy
I want to make the same scheme but voltage 24 V. Dc What needs to change
Whats the durability of this circuit, will the led stop working sooner beacuse of the flashing?
Nope, it will work very well
Sorry, can't take the music so I just turn the volume down
Ideal para la moto y chau relé gracias por el vídeo.
Great video... Plz explain it's working principle, means what is the work of each component in it & flow of current.
superb tutorial..thanks a lot.
Kya ispe 2 led chalegi ek saath ??
What are the materials? is it easy to do?
Nice job
Nice video Make video with 5w led flasher with 12 v dc input
अगर 10 10 led लगाना होतो कैसे ऑपरेट होगा और क्या क्या वॉल्यू होगी कंपोनेंटस की
Itu LED biasa apa led udah berkedip
just for one LED?
'
that nice idea...
can do that work with 6 volts batterys...
dont need 12 volts...
what size of LED 3mm or 5mm...
what BC547 to do with middle pin between C and E
Can we connect it on motorcycle???
What are the specs on the LED? 5V? 12V? How many mA?
Hola, ¿ Se puede hacer con una fuente de 5 voltios?, ¿que resistencias necesitaría?
can we add 4 other LEDs to this?
Thank you for the video.
I am nubie in electronics, I tried and did like what you showed, but it worked only if I touch the led's plus pin with one of the multimeter needle. May I ask what seem to be the problem?
Check the soldering if you do not have much experience in soldering .Erratic behaviour of the circuit is possible in case of wrong or loose connection.
@@chetananam475 ok. Will try again from start. Thank you.
Sir please ask first background sound name
Mạch chớp này rất hay
Bisa diaplikasikan untuk lampu senja di motor ga ?arus dc 12 volt
Total cost kitni padegi bro if i use 3 watt led bulb