Very useful circuit for everyone

[@chila70]

Which Is autonomy of the bulb with this circuit.? Congratulations from Argentina

[@andrimastirta4736]

Nice video 👍 I want to ask, If the voltage is increased to more than 100V, will the voltmeter be damaged?

[@TechIdeasAG]

Yes it will

[@kabandajamir9844]

The world's best teacher thanks

[@paulosantos2023]

Use uma mangueira de borracha para na ponta para romover soldas

[@vernonbosshard9317]

Interesting rendition of a boost converter.

[@zarnianali8091]

Is it safe to touch?

[@ALEFILES]

YES, because its current is LOW... BUT... BE CAREFUL! This circuit is ONLY for test LED and ZENER diodes! DO NOT connect to a dichroic lamp or similar...will make EXPLODE it! Greetings from Argentina😂

[@vernonbosshard9317]

@@ALEFILES Don't tempt me.

[@vernonbosshard9317]

Hows the old ticker? working good?

[@ALEFILES]

@@vernonbosshard9317 ticker? You meant hearth? Yes! It must be working fine, because If I can write you now, is because I'm alive... Greetings from Argentina! :)

[@ALEFILES]

THE (+) TERMINAL OF THE 4.7 mf capacitor MUST BE connected between the 1N5408 cathode and the 15K resistor... You can improve this circuit using a FAST DIODE (e.g. UF5408) instead the 1N5408... Greetings from Argentina!😂

[@vernonbosshard9317]

I understand everything except the operation on the transistor switching.

[@vernonbosshard9317]

I think I see it, when the circuit is first powered on the inductors polarity is reverse of the battery, that would put a negative base signal to the transistor turning it on, the field would build and the polarity would reach null after 5 Tau, turning off the transistor, thus letting the inductor collapse into the cap.

[@mustaphabenali5167]

Thanks for the idea

[@Ben-Tronic]

an again.. the Joule Thief 🙂

[@HYTMUAE]

You have changed the connection "+" of 4.7uF without mentioning it during the video!!!

[@ALEFILES]

You are right...Thanks for the advice! Greetings from Argentina!😂

[@alekseioarev6501]

Отлично а схему можно?

[@meddiys6171]

Excellent.

[@jayan3538]

What is the output current?

[@vernonbosshard9317]

The voltage of the cap over the load resistance plus the 15K is my guess.

[@kouiderz-39.]

excellent 👍

[@TechIdeasAG]

Thank you! Cheers!

[@Валерий-ю3я]

😅 отлично