This can also be used to test optocouplers. If the LED is flashing, the coupler works, if the LED is always off, the internal LED is bad (open circuit), and if the LED is always on, the internal light sensing transistor is shorted.
wow.. yours is the best among all I've watch today while searching for a single led flasher with 3.7v input..! Thank you so very much.. You've earned my subscription.. 👍👍👍
Hello, the circuit in video will work with 12V? I need to put that with a switch on my motorcycle to know when the switch (wich control pit lane limiter ) is at ON position. Thank you Bro 😌
buenas tardes lo felicito por sus proyectos muy eficases para probar componentes,una pregunta tines entre tus proyectos algun probador de transistores npn y pnp una herramienta para ambos,espero su respesta gracias Douglas dsd Caracas Venezuela
You can also change the value of the 5.6k charging resistor, but I don't recommend using anything smaller than 3.3k, as it can damage your optocoupler.
@@Angelo1111z Big resistor included as well. Increase value of charging resistor (5.6k) to at least 50k. It's gonna charge much slower, but there's some possibility that the optocoupler will drain the capacitor instead, not charging it up enough..
The circuit won't work without an LED or any loading resistor replacing said LED. The capacitor's voltage will quickly exceed the trigger voltage of 1.1V, which if not discharged through some load will overload and later destroy the coupling LED. Around 20 mA. Theoretically, this circuit can oscillate at over 10 kHz if you use a really tiny capacitor, but you won't be able to see that.
A cheap option to replace my 555 with single use 9v battery. 4v rechargeable battery will be the logical reason. I'm still wondering why bc547 blinker only work above 12v
Because the two pins circuits uses Tr break voltage not gate. And this voltage is usually 8-12 on common transistors. You must use gate-based (three pins) circuit... but in that case the strobe effect is not so strong because bipolar(linear) transistors have some forward resistance. Adding high-power optorelay or mosfet (which have minimum Dss resistance, usually under 0.1Ohm and currents in amps or tens of amps) into the circuit as an effective power-output may solve this problem - and you can use it even for very high-power cobb diodes or other high-power outputs.
In this circuit, it works like a electromechanical relay (switch) that switches once a threshold value is reached (around 1.1V), the same thing that transistors would do. This discharges the capacitor into the LED, lighting it up. Then, the voltage drops and it won't be high enough to trigger the optocoupler anymore, and the charging/discharging process repeats.
Bhai meain optocupler ic ke bare meain sikraha hu aur practical karke working dekna chatha hu tho bhai ap batha sakthe hain kya video meain jo optocupler ic hain uski input pin ke liye kithna value ka resistance chahiye
Also ich verstehe das das Funktionsprinzip dieser Schaltung nicht. Der Kondensator zb soll ja wohl das Blinken verursachen. Aber wieso sollte er das? Ein Kondensator wirkt als Zwischenspeicher für Spannung. Er sorgt zb dafür dass der Strom einer Schaltung weiterläuft wenn winzige Störungen diesen stoppen würden. In diesem Aufbau fungiert der Kondensator nach meinen Verständnis als Leitung. Wenn man den Strom abstellt zb. geht die LED nicht schlagartig aus sondern allmählich (wenn auch schnell). Wenn mir das jemand erklären kann wie das hier funktionieren soll wäre toll.
@@TechIdeasAG nhi bro mera box kahin miss place ho gaya hai jis me ziner diod condenser sub tha... or kisi spare parts ki shop pe bhi nhi mil raha hai ye transter
Are you sure? Yes, it will work with a simple diode and a normal transistor but I believe that the optocoupling adds some feedback/reaction to the effect. I don't have the means but maybe you could see the differences on an oscilloscope. ;)
Well it can, but optocouplers behave like relays, just solid state based. You need to apply a voltage (around 1V) to one side to get a closed circuit on the other. This makes it slightly easier to understand unlike transistors.
This can also be used to test optocouplers. If the LED is flashing, the coupler works, if the LED is always off, the internal LED is bad (open circuit), and if the LED is always on, the internal light sensing transistor is shorted.
wow.. yours is the best among all I've watch today while searching for a single led flasher with 3.7v input..!
Thank you so very much..
You've earned my subscription.. 👍👍👍
Thank you very much
few quisten/help
1)what should we do to change the time if light blinking.
2)how much difference should there be,if we use two different resistance .
Works fine! The simplicity I like more, thank you very much!
🙏❤️ Pretty awesome. I was searching for something to replace the 555 on my project. It'll be very useful.
Thanks
Really you are The Man of perfection.I love your work . Keep it up & spread your knowledge.❤️
Is there any way to adapt 12V?
New to optocoupler, why does flash in the first place, could you explain. Thank you if you can
U r all videos is super..
can you tell me which background music is there in this video
Does it work with 6 volts?
I want to use 18V DC... What Resistor do I need to change? THANK YOU!
What resistors or capacitor do I need to make this a 12V and/or a 9V?
how does the circuit work?
Is it possible to slow down LED frequency blink? Thanks!
Yes , just increase the capacitor value
@@TechIdeasAG Perfect! Thank you Sir!
How many leds we can blink on single Optocoupler.. ? Thank you
Hello, the circuit in video will work with 12V? I need to put that with a switch on my motorcycle to know when the switch (wich control pit lane limiter ) is at ON position. Thank you Bro 😌
Ofcourse, will work fine
@@TechIdeasAG Thank you very much. Greetings from Italy 💪
Excuse me, is it possible in 3v battery?
Good, can we increase capacity of. Capacitor for slow blinking
Yes we can
Is it possible to use only one resistor? Because I'm using a 3v bat. And can't light a blue led.ty
It'll not work using single resistor
@@TechIdeasAG oh okay,, so what do you think the resistor will work on blue led using 3v?
buenas tardes lo felicito por sus proyectos muy eficases para probar componentes,una pregunta tines entre tus proyectos algun probador de transistores npn y pnp una herramienta para ambos,espero su respesta gracias Douglas dsd Caracas Venezuela
Very good job. if i want to increment the frequency how can i do?
Use low value capacitor
@@TechIdeasAG Thanks and have a good day.
Does it work with 4.5 volt
Thats good, you show the source of battery, but can I know how to control the faster of the LED?
Decrease the capacitor value
You can also change the value of the 5.6k charging resistor, but I don't recommend using anything smaller than 3.3k, as it can damage your optocoupler.
Bhai what changes to make in this circuit with 12v dc supply.
इस सर्किट को 12 वाल्ट dc से चलाने के लिए क्या बदलाव करना पड़ेगा
please help im using power led 1 watt (3.0-3.3v). so what resistor and capacitor do i have to change?
input 18650 (3.7v)
Hi friend, then it'll not glow in full power, because it uses only the capacitor's store energy.
BTW you have to change nothing in this circuit.
@@TechIdeasAG oke thank you sir
You welcome
What voltage are you using? If you apply another Led where and how to blink separate from green led.
Lithium ion battery - 3 - 4.2V, nominal 3.7V.
Around 3.7V.
Cap is is charging/discharging?
Old stuff!
Yeah, but with light emitting and sensing semiconductors.. relays were used in the old days.
Flashing ki speed ghatane ke liye kitne ka capacitor laga na parega
Can I use this curcuit for 24 watts LEDs???
Nope,
@@TechIdeasAG 12V LEDs?
How much LED we can use for that ?
Работает. Главное полярность резисторов не перепутать...
Полярность резисторов .👍👍👍👍
И синию изоленту.
Wow..amazing bro...
#regard from indonesia
How do i make it strobe once every minute?
Add big capacitor
@@Angelo1111z Big resistor included as well. Increase value of charging resistor (5.6k) to at least 50k. It's gonna charge much slower, but there's some possibility that the optocoupler will drain the capacitor instead, not charging it up enough..
Can I use instead of "radcom 817b" optocoupler
As long as it has "816" or "817" in its name it can be used. Any other letters are markings by other manufacturers.
White led??
does this work for 6 pin 4n35?
As long as you have the datasheet, yes. But beware, the pinout is different!
Kitna volt se chalega .Ye adha audura video huaa
12v R?
How much power consumption without the LED?
The circuit won't work without an LED or any loading resistor replacing said LED.
The capacitor's voltage will quickly exceed the trigger voltage of 1.1V, which if not discharged through some load will overload and later destroy the coupling LED.
Around 20 mA.
Theoretically, this circuit can oscillate at over 10 kHz if you use a really tiny capacitor, but you won't be able to see that.
A cheap option to replace my 555 with single use 9v battery. 4v rechargeable battery will be the logical reason. I'm still wondering why bc547 blinker only work above 12v
Because the two pins circuits uses Tr break voltage not gate. And this voltage is usually 8-12 on common transistors. You must use gate-based (three pins) circuit... but in that case the strobe effect is not so strong because bipolar(linear) transistors have some forward resistance. Adding high-power optorelay or mosfet (which have minimum Dss resistance, usually under 0.1Ohm and currents in amps or tens of amps) into the circuit as an effective power-output may solve this problem - and you can use it even for very high-power cobb diodes or other high-power outputs.
hi... can you please tell me how can i lower the blinking frequency on this circuit?
By changing the value of the 5.6 resistor
@@techmonster2632 thank you. 👍
What is use of capacitor ?
Saurabh Suryawanshi timing
Hi...Will this work on 12v dc input ?
Yes, you can use 12v
How can I reduce the flashing speed ??
Increase the capacitor value
@@TechIdeasAG
Thanks
Can MCT2E optocoupler be used in place of PC817 optocoupler?
Yes, ofcourse it will work fine
@@TechIdeasAG Thanks, dear you.
Kindly guide me to make necessary changes if any while using MCT2E.
Regards
How long does the battery work?
It consume very little power so battery will last long
3.7 v work?
Aur kay karna chahe ye
It works,thank you very much.
Nice simple usefull circuit.
Cheers from Indonesia
Thank you very much
OHH IT IS NOTHING
Mantap ye ide nya...😀🙏
It works with 5 volt input!
4 to 9 voltage working & 3 to 4 LEDs connect parallel ?
Sir can you help me? I need led blinker with quick on and slowly off.. thank you
kapo!!! saludos of argentina
did anyone see the curcuit change at 1.37 ?
Bhai eis 12v me kaise chalay,? please batiye
What is the optocupler function?
Search on Wikipedia
In this circuit, it works like a electromechanical relay (switch) that switches once a threshold value is reached (around 1.1V), the same thing that transistors would do. This discharges the capacitor into the LED, lighting it up. Then, the voltage drops and it won't be high enough to trigger the optocoupler anymore, and the charging/discharging process repeats.
what voltage?
Kalo untuk led 12 volt apa bisa mas
The maximum input voltage?
Forward voltage of an optocoupler is 1.1V at around 20 mA, so not much.
This circuit works from about 3V up to 5V.
That's cool! I will make it on my channel.
Can xc 529 replace it?
Yes, you can use it.
सर मेरा सर्किट काम नहीं कर रहा है सब वायर मैंने ठीक जोड़ी है प्रॉब्लम क्या हो सकता है बल्ब जलते रहता है नहीं ब्लिंकिंग करता है
Optocoupler pode usar qualquer um ? ou só este modelo PC8017 ?
...навесной монтаж...четко ясно понятно...куда только можно применить такую приблуду...
Полиция в глубинке себе такую сирену ставит
Как вариант , украшение на рекламный щит .
Bhai meain optocupler ic ke bare meain sikraha hu aur practical karke working dekna chatha hu tho bhai ap batha sakthe hain kya video meain jo optocupler ic hain uski input pin ke liye kithna value ka resistance chahiye
works perfectly, good circuit
Great idea
keep up good work bro :)
Background music please middle volume
'
nice kit...
can use this a pack of 3 AAA batterys as 4.5 volts and mini switch...
better white LED light
Yes it will work
Works great :)
cool work )
Excellent
Song??
Also ich verstehe das das Funktionsprinzip dieser Schaltung nicht.
Der Kondensator zb soll ja wohl das Blinken verursachen. Aber wieso sollte er das? Ein Kondensator wirkt als Zwischenspeicher für Spannung. Er sorgt zb dafür dass der Strom einer Schaltung weiterläuft wenn winzige Störungen diesen stoppen würden.
In diesem Aufbau fungiert der Kondensator nach meinen Verständnis als Leitung.
Wenn man den Strom abstellt zb. geht die LED nicht schlagartig aus sondern allmählich (wenn auch schnell).
Wenn mir das jemand erklären kann wie das hier funktionieren soll wäre toll.
Nice idea👍
I like pc817. Thanks for knowledge.
Et si on branche 10 leds avec une alimentation de 12/15 V........les valeurs sont les même ?
mustang gt 500 Yes
with a 5mm led can or no sir/(dengan led yang 5mm bisa apa tidak pak)
Of course it can. It's an LED. It will draw a bit more current but nothing horrible.
817 and 817c will work
bhai 2N2222 kis charger ya kis circuit se mil sakta ha plesae help
Ok,
Bc547 hai tumare paas?
@@TechIdeasAG nhi bro mera box kahin miss place ho gaya hai jis me ziner diod condenser sub tha... or kisi spare parts ki shop pe bhi nhi mil raha hai ye transter
si vas a cortar asi los pines de los componentes mejor los reciclas de algun electrodomestico roto
Same component use kar ke bhi led flashing hota nahi
Ficou interessante. Abraço!
Pls.. Make a video using 5 led light with on/off switch thank u
Well done
Cool.....im wait more creation teknik
no need Optocoupler , just normal transistor can do the same !!!
Are you sure? Yes, it will work with a simple diode and a normal transistor but I believe that the optocoupling adds some feedback/reaction to the effect. I don't have the means but maybe you could see the differences on an oscilloscope. ;)
Well it can, but optocouplers behave like relays, just solid state based. You need to apply a voltage (around 1V) to one side to get a closed circuit on the other. This makes it slightly easier to understand unlike transistors.
Nice idea, it can use for testing optocoupler
На опто паре видел усиление сигнала. Ну это так..
Excelent
Ночью,, на,, КАСКУ,,, ато,, на,, СЕВЕРАХ,, ДАЖЕ,, В КАСКЕ
В, СОРТИР,, ТРЕБУЕТСЯ,,//,, идёшь,, и, Моргает,,
Super bro
So nice 😗😗😗
that's cool bro
👍👍👍
mind blowing
Perfect
I like it
explain clearly