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.. 👍👍👍
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
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
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 😌
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.
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.
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.
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.
@@markangelosegurola2941 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..
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.
Works fine! The simplicity I like more, thank you very much!
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
Wow..amazing bro...
#regard from indonesia
It works,thank you very much.
🙏❤️ Pretty awesome. I was searching for something to replace the 555 on my project. It'll be very useful.
Thanks
U r all videos is super..
Really you are The Man of perfection.I love your work . Keep it up & spread your knowledge.❤️
That's cool! I will make it on my channel.
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
Cool.....im wait more creation teknik
Works great :)
Nice idea👍
I want to use 18V DC... What Resistor do I need to change? THANK YOU!
works perfectly, good circuit
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
I like pc817. Thanks for knowledge.
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 .
cool work )
Ficou interessante. Abraço!
New to optocoupler, why does flash in the first place, could you explain. Thank you if you can
Super bro
Nice idea, it can use for testing optocoupler
kapo!!! saludos of argentina
What resistors or capacitor do I need to make this a 12V and/or a 9V?
that's cool bro
4 to 9 voltage working & 3 to 4 LEDs connect parallel ?
How many leds we can blink on single Optocoupler.. ? Thank you
Perfect
I like it
Great idea
keep up good work bro :)
Optocoupler pode usar qualquer um ? ou só este modelo PC8017 ?
Nice simple usefull circuit.
Cheers from Indonesia
Thank you very much
OHH IT IS NOTHING
Mantap ye ide nya...😀🙏
Fantastic
It works with 5 volt input!
Does it work with 6 volts?
Excellent
Is there any way to adapt 12V?
Работает. Главное полярность резисторов не перепутать...
Полярность резисторов .👍👍👍👍
И синию изоленту.
Excuse me, is it possible in 3v battery?
How much LED we can use for that ?
mind blowing
Flashing ki speed ghatane ke liye kitne ka capacitor laga na parega
will this work on 1.5v?
Does it work with 4.5 volt
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 💪
3.7 v work?
Kitna volt se chalega .Ye adha audura video huaa
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
can you tell me which background music is there in this video
what voltage?
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.
Well done
Good, can we increase capacity of. Capacitor for slow blinking
Yes we can
Nice
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.
12v R?
White led??
So nice 😗😗😗
'
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
Bhai eis 12v me kaise chalay,? please batiye
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?
Sir can you help me? I need led blinker with quick on and slowly off.. thank you
Is it possible to slow down LED frequency blink? Thanks!
Yes , just increase the capacitor value
@@TechIdeasAG Perfect! Thank you Sir!
Song??
Good
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.
Excelent
Pls.. Make a video using 5 led light with on/off switch thank u
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
Wow
que isso ....... 1000000000000 like demais mesmo
817 and 817c will work
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. 👍
👍👍👍
great
What is use of capacitor ?
Saurabh Suryawanshi timing
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
👏👏👏👏
Thanks for Sharing. ;-)
Thanks
Aur kay karna chahe ye
...навесной монтаж...четко ясно понятно...куда только можно применить такую приблуду...
Полиция в глубинке себе такую сирену ставит
Как вариант , украшение на рекламный щит .
How long does the battery work?
It consume very little power so battery will last long
Kalo untuk led 12 volt apa bisa mas
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.
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.
Cap is is charging/discharging?
Old stuff!
Yeah, but with light emitting and sensing semiconductors.. relays were used in the old days.
good good
does this work for 6 pin 4n35?
As long as you have the datasheet, yes. But beware, the pinout is different!
Can I use this curcuit for 24 watts LEDs???
Nope,
@@TechIdeasAG 12V LEDs?
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.
Hi...Will this work on 12v dc input ?
Yes, you can use 12v
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.
Et si on branche 10 leds avec une alimentation de 12/15 V........les valeurs sont les même ?
mustang gt 500 Yes
NOW DATS SIMPLE ....................
Can xc 529 replace it?
Yes, you can use it.
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.
Like)))
How do i make it strobe once every minute?
Add big capacitor
@@markangelosegurola2941 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..
Show
explain clearly