@@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
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.
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?
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.
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 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.
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.
' 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
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.
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.
@@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.
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.
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.
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
I have all the parts and hooked up. No strobe effect. Followed instructions as indicated on your RUclips 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.
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.
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...
@@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.
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 !!
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?
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.
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?
All these fun little projects on youtube make me want to invest in some tools lots of tools
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.
your presentation skills are getting better. nice little project.
That looks great! Excellent strobing effect! 🚨👍🏼
Its fantastic! Many thanks!
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?
If I gonna use this in a 2v led strip what value of capacitor and resistor will I use?
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?
Changing the value of the capacitor alters the time constant increasing or decreasing the rate of flash.
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!
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.
Must be tray to make this ideas. Love it 👍 and Thank You 🙏
COOL . SIMPLE E MUITO BEM EXPLICADO E MONTADO . PARABÉNS . VALEU
superb tutorial..thanks a lot.
Ideal para la moto y chau relé gracias por el vídeo.
good evening you liked the green led. great videos happy New Year
Oscilador por saturación a ruptura o vavalancha, ¿es cierto? Buen video, gracias.
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.
Bloody fantastic thanks
Working fine... someone please explain why the base terminal is not connected to the external circuit.
Good content bro, love from kerala
ഹായ് 🤪
Thank you so much, it's thanks to you that I did what I wanted
Great job brother. .
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.
Avalanche breakdown.
Nice illustration.
sir pls explain how its avalanche breakdown
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 ! 😁😁😂😂
Nice video! Can you explain how transistor switchs on and off without variation of potential on its gate?
Very simple and nice
'
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
Great, is it what I was looking for, how many LEDs can be connected to this system? How many volts does it work with?
What if I want to have a super bright strobe? Can you do a video on that?
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.
hi. I need this strobe light but powered by a 2s lipo, 8,4 v fully charged. It will work?
Thanks
Hola, ¿ Se puede hacer con una fuente de 5 voltios?, ¿que resistencias necesitaría?
Thanks! I subscribed
What is the resistor values for Red, Yellow, Blue and White LED's?
How to increase / decrease the time between two flashes?
Awesome idea
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.
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?
Can i use it for 9v ?. and im gonna add 3 LED's at the same time , it will work ?.
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
Bought an airplane to take that transistor out and complete this video tutorial
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? 🤨
how does it works? without triggering base?
Good job, any simple project for pulsing led ?, thx
Im using 12v led what is the resistor ohm should u use
Wonderful...Thank u...
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
Hi can you please help to make a Butter Churner using bidirectional motor?
parabéns + 1 escrito like
How many LEDs do you support?
Muito bom! Very nice! Sp Brasil , obrigado. Thanks!
Thank you very much
@@TechIdeasAG you ar10
Great
Mantap kreatif
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.
how many leds can be used in this circuit?
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.
saved it for watch later bro nice!
I really like your ideas. How to do a circuit like this with 15 reds LED and 12v supply? Thanks
Not possible
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.
12v light use kr skte hai....
Nice video, thanks :)
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 :-)
how to modify for 20 watts LED?
fantastic
Nice!
What are the materials? is it easy to do?
For 5 v supply resistance used?
I have all the parts and hooked up. No strobe effect. Followed instructions as indicated on your RUclips 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.
Nice job
அருமை....
just for one LED?
hahaha great job😀
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.
What are the specs on the LED? 5V? 12V? How many mA?
Did it work for 12volts led?
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...
Total cost kitni padegi bro if i use 3 watt led bulb
Hey, the music is repetitive and annoying. Every dam video has the same distraction. But good work 👍
So? Turn it down or off! 😕
True.
very nice 👍👍👍👍
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.
thenks bro nice
perfect man
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 !!
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?
Can i use 12v led smd instead of single led 3v
What changes need if we want to add 50 led
अगर 10 10 led लगाना होतो कैसे ऑपरेट होगा और क्या क्या वॉल्यू होगी कंपोनेंटस की
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.
What are the requirements for 24v dc pls comment
How do i make it strobe once every minute?
How can I make the blinking slower?
This led strobe can connect to bike?
How to increase blinking time to 4 or 5 seconds ..?
Can you make it 10watt led strobe lights
Bisa diaplikasikan untuk lampu senja di motor ga ?arus dc 12 volt
Nice project
how can I make one for 5 V input ?