inventor aw - That's why you shouldn't throw away your old phone charger !
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- Опубликовано: 9 июн 2023
- I modified an old phone charger and made it output 30 volts then, I added a voltmeter screen to use it as a tester for measuring any LED or zener diode less than 30 volts.
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Warning: ⚠ ⚠ ⚠ have fun but always remember to be Safe, anything you try is at your own Risk , thank you
Can you use any phone charger on the table?
@@aivonabeywardana4213 6:44 6:44 Thank you. I have every charger and transformer that ever existed at every voltage. Higher voltage will really help my issues?
@@gaswirt ❤❤❤
Hmm, a neat little circuit, but I worry about folk who don't know what they're doing messing with mains voltages. At the very least, it should be encased in something to prevent straying fingers touching the 'wrong end'.
Thank you for the great solution and footage. Please make another video with the installation of components in which a 110v power supply will be used
These small switchers are invariably flyback types. Significantly raising the output voltage of the supply MAY result in damage to the switch on the high-voltage side. If you are using an AC line voltage well below the allowed maximum you are probably safe. If your line voltage is already near the maximum allowed, you could destroy the switcher.
The secondary voltage is "reflected" back to the input side and "stacked" on the supply voltage according to the turns ratio of the so-called transformer when the switch turns off and the energy stored in the input winding is being transferred to the output winding. This is the only time that the inductor really acts as a transformer, and it is a design limitation for a flyback converter. Typically the inductor is designed so there is some safety margin between the sum of the peak DC on the input side and the reflected output voltage and the voltage rating of the switch. If you increase the output voltage it may result in exceeding the maximum allowable voltage across the switch which usually causes it to fail short-circuit.
Another potential problem is that many of these switchers use an extra winding on the inductor to power the switcher IC after it initially starts. If the output voltage is set too low the IC may get insufficient voltage to keep it running, resulting in in shutting down, trying to restart, running for a fraction of a second (typically) then shutting down again.
Thanks to the clear and concise way you explain it makes one want to go do it right now
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It will work in low current range (ae no load), because voltage output element is transformer, that zener only for voltage stabilization via feedback circuit.
An excellent and necessary device, thank you!!!
I have analog version made from little tranformer 30V 150mA with current limiter at few mA so i can check the Zener diodes values up to 30V.....but this is AWESOME idea as well...very compact!!! Will do some of this as well for sure!!!
Your idea is good but this is dodgy as hell somebody will get hurt I think you know this
Very useful to discover the power of any components.
Thank you for the useful information, you explained it clearly and made it easy to understand! 👌🏻
Verdade
easy to understand......even to lezard-men like you
@@yusufgaridi9523 now you, I don't understand, on account of the fact you make no sense... You're better off blowing things up instead, like national monuments!
Fantástico! Indispensável na bancada de qualquer profissional da área da eletrônica. Parabéns e obrigado por compartilhar. Um respeito abraço do Brasil 🤗 🇧🇷🙏
Obrigado
@@Inventor_AW9l😅
Thank you very much for this very useful device. In my opinion because of the voltmeter power supply is maximum 30 Volts, you don't want to excess 29 Volts. If it is possible to increase the output voltage more than 30 Volts, you can add for example 7812 voltage adjusting device and take + 12 Volts for power supply of voltmeter. Thanks again. 👍
I just didn't want to strain the transformer
THAT WAS BEAUTIFUL !
I tried to take an electronics course at a local high school tech night-school, but there weren't but 5 in my class. I was 15 and tge average age was 25 to 40. They cancelled our class & gave us the choice of getting our tuition back or choose another class. I went to MACHINE SHOP.
What you did I followed, but didn't understand the WHY's and Where-fores. I understand, pretty much, what each thing does, kind-of, but not together.
Please do a video on HOW components do the outcome, together. My expertise was rewires and burn-ups on Locomotives. I let somebody else take care of the solid state stuff.
Thanks again fir your content. It was very well done! I'm fixing to SUB.
Nice!
Looks similar to the TV backlight tester device.
Thanks to you, I can evaluate our old chargers, thank you very much...
if you just turn the pot around, you would get increasing voltage with clockwise rotation....
, 😊😊😊
Why *you{͡ ಠ ̯͡ಠ}* are telling this deep secret ㋛ ! - _? ?_
@@ernstlessau8208he he!!!
careful...folks will be looking for some POT. (Some of that wacky-backie, "smoke it and take a trip and never leave the farm!")
Say Variable Resistor or POTentiometer.
Very good information, earlier i show one circuit with multimeter after adding some circuit we able to measure led, zener diode , mcpc ect, and there voltage.
thanks for watching
Bruh, I've got to say this has been one of the best demonstrations on how to desolder components from a PCB. I WILL be referencing this in the future when I move and have time to get into electronics again...
I wish you a good luck
Well at least it's not as deadly as some - but i'd still look at that transformer closer before using it.
Also most phone chargers will have a '431 reference of their own, so modifications are either easier or harder, depending on the circuit...
Finally, you should never push a transformer winding too far outside it's design voltage, as things get quite inefficient - possibly even dangerous! There is a reason why a relay clicks in the benchtop power supply; it selects three taps on the secondary winding - 0-7V, 7-15V and the final one goes to 30V... Simply looking at transformer action etc. should make it clear as to why it does this (hint: it's to do with 3Amp output current)
Here there is a 10K? resistor, to limit the current - so the power handling is actually not bad...
Saludos desde Medellin muchas gracias por compartirnos tus grandiosas investigaciones
WOW!!! Thank you so much for sharing your tips and tricks with all of us and I’m very impressed 😊
So nice to see a fellow who actually knows how to solder!
thank you bro
Excelente video. Sus videos son muy útiles.
Grand idea and useful point. I at first thought you were going to just make a adjustable power supply, but what you made was very good a testing device for Zener diode mostly or LED diode power value.
I am still shocked to see the original power adapter have the possibility of 30 volts. I'm assuming that phone charger is a 5-6 volt power adapter, so that Zener diode had a lot of blocking to do.
It is no shock these can still overheat. That voltage drop energy has to go somewhere....
Very interesting noticed
The zener is part of the regulation circuit with the opticoupler, it wasn't directly on the output
@ Ok, I have seen that on a older circuit years ago, the Zener being the last low end regulator after many voltage dropping resistors and capacitors.
I'm guessing that if this is a so called "universal input voltage" model, it won't make 30 VDC in the US. But you are right in that if it was designed like that, there's a lot o wasted energy and heating, built into the design. I guess it's easier and makes manufacturing simple, but it is inefficient.
I'm in the US with the 120v 60Hz standard and I've seen a lot of issues with this universal input designs. Mostly, underperforming issues. I suppose the heat and efficiency issues are more likely in the 240V world.
I hate looking at these kind of videos for a bit and then realizing what they are building was designed for the 240 volt world! I get that there are only about a billion of us using split phase voltage, 60 Hz in the100-125 volt range and that many more people have the 240is volt, 50Hz standard, but realistically, most of those people can't even read!! AW says it doesn't matter, but in many cases it does.
Just my two cents, but electricity as distributed, is not universal. The physics works the same no matter where you live. But when you are modifying consumer goods for alternate purposes, one needs to understand that those items really are universal. Modification you make to devices in one country, very well may not work in another,
@@professorg8383: questo progetto va bene sia per alimentatori per 230 volt sia per 110 volt. La dissipazione è uguale in entrambi i tipi di alimentatore perché il funzionamento è switching.
here multimeters are cheap at harbor freight, etc. Does this do something a regular multimeter can not? It might be more useful to use a case mountable potentiometer that can be easily adjusted and make this into a variable power supply. you could use this voltage display or use a voltmeter ammeter display.
Rapaz, muito bom mesmo. Simples mas eficaz. Parabéns pela excelente ideia. DEUS continue te abençoando.
Obrigado
I just did this, was testing a smd LED, touched the uninsulated connections to the power supply inlet with my elbow…. Muscle spasmes and my arm shot out…. Punched the cat….. cat went out the window…. Landed on my old school teachers head….she fell over onto my car and broke my door mirror! Thanks! Now I have no door mirror and a vets bill for a cats PTSD fear of heights and a school teacher that now gives my kids bad reports at school parents evenings! All for saving a couple dollars on a ready made unit!
A wonderful fairy tale .. Thank you for sharing
I am industrial technician, repairing and installing freeze and cold systems. I´m not into electronics repair, but that looks great tool for you guys. I saw the complete video, very interesting. Thanks for uploading clear and good quality explaining. Best,
Muy buen video y excelente explicacion. Muchas Gracias.
Gracias
Muito bom. Assim que eu tiver o voltímetro e o resistor variável, vou tentar fazer, um pois é muito útil. Saudações do Brasil.
Obrigado e desejo-lhe sucesso
Very wonderful idea
Depending on voltage drop in wattage is how much heat your have to absorb
Acho sensacional esse tipo de recurso eletrônico para recuperar aquilo que está danificado e até melhorar o seu funcionamento. A eletrônica sempre me fascinou desde de criança. Meu pai estudava eletrônica via correios e chegou a montar um rádio. Enfim, o video foi muito interessante.
Obrigado ❤❤
Meu falecido pai aprendeu pelo instituto Universal Brasileiro, todo mês saia um livro diferente, chegavam partes do circuito todo mês pra montar.
ну радио это круто, но мой дядя собрал компьютер в 88 году, и это делали очень многие советские студенты) называется zx spectrum.l
essa pecinha azul serve para aumentar e diminuir a voltagem? por que tem um no AVR do meu gerador e eu aumentei e vi que mesmo ele em marcha lenta a energia ficou mais forte, só que não sei se isso pode estragar ele.
Que bueno !!! Te felicito un buen probador de diodos comunes , zener y led, lo voy hacer , gracias amigo . y Viva la libertad, carajo !!!
VLLC!!!
Gracias y buena suerte
Ferramenta excelente!
Good job, Thanks a lot.
It's amazing! Thanks a lot!
Adoro eletrônica parabenizo vc por compartilhar seus conhecimentos 👍
crt tv fly back nosel which is having high heat resistance, cut the half inch straight part and push on soldering sucker that work well and this way sucker white plastic tip will not damage the pcb.
Please make a short vlog on this.
I will
Why waste our time. Tell us at the start what this is supposed to do.
Exactly.
It's supposed to test the rated forward voltage of diodes by dropping down to their voltage when connected. One slip & you electrocute yourself it's stupid
are you a puny and arrogant muslim?
@@neiliewheeliebinmost of these electronic channels are
Diode tester. It works to seek the voltage of LEDs and Zenners. And it drives LED series.
модифицировал старое зарядное устройство для телефона и заставил его выдавать 30 вольт, затем я добавил экран вольтметра, чтобы использовать его в качестве тестера для измерения любого светодиода или стабилитрона с напряжением менее 30 вольт.
Awesome! Thanks!
Sir please make a video about auto on off timer circuit for any project.
I will
*Не стоит забывать о том , что не смотря на изменение выходного U , выходная P (мощность) = остаётся прежней* ☝
Ferramenta incrível. Vou fazer uma tbm. Obrigado
Boa sorte
i advice you to use a piece of silicon cable isolator for your soldering pump's end pipe.
it's original part is normally too rigid plastic and you can buy a lastic cover but they are expensive, whereas 2-3 cm silicon cable cover is almost free and more useful than original one.
Thanks for the advice.. Yes I know it and you can find it on an old CRT TV high voltage transformer cable
@@Inventor_AW
i don't know your country's trade conditions but we can find the silicon cables at any electrician shop. for this application (to cover soldering pump edge or mouth) it's ideal just 6 mm outer diameter of cable isolator.
great idea, but LEDs are current sensitive it means that if more current is passed than what a led is designed for , it may cause burning. most of 5mm LEDs requires about 20mA to work properly. so how output current is controlled!!
There is no worry about current because there is a 10k resistor connected in series with the voltage source. On the other hand, the voltage rises at the expense of the current decrease
this is zener diode checker and tester.. briliant...
would this work with a 2 wire (red/black) voltmeter? and how would you alter the circuit in that case?
2 wire voltmeter won't measure less than 3V
Nice trick, don’t forget to change the output capacitor to one with 30v or over
I replace it to 50V cap
Thank you sir! very amazing! But what happened to LED?
which LED?
I like how you explain what the name and number of the part your using
thanks for watching
I have a question? Can it modified to use the Multimeter, We will not be spending on extra Voltmeter and Probe and if Yes. Please share the modified schematic.
Eu tenho uma pergunta? Pode ser modificado para usar o multímetro, não gastaremos com voltímetro e sonda extras e se sim. Por favor, compartilhe o esquema modificado.
Yes you can.. It's simple.. Connect the black wire of the multimeter to GND and the red wire to the 10k resistor
Is it possible to make a power supply 5V 1.5A with this modification if I have a 2A charger ??
This modification is for controlling the voltage via feedback
Hi, I never through old electronic stuff and it very often find its use, even just for study of their design and not only electric parts ...
Regards
Jean-François
Neat little project. :) The video is easy to watch and listen to. It was good to clearly see how to desolder; I haven't had enough practice at that.
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Obrigado por colocar legenda!
Здравствуйте.Лазерные диоды с cd rw или другие лазеры, проверяет? Вы, можете дать ответ?
Super job
thanks
I own an UT33C since 2016.
excellent
thanks
nice, but why don't you show the schematics of this diode-replacement (potentiometer circuit) at 2:33 ?
thanks , We replaced the fixed zenner diode with the variable one
Forgive my ignorance, but what's the use of the pot if it's to be set to its highest value? Wouldn't be more convenient to use a resistor, was it 500K?
It was possible for me to do without all this and just put only a 30 volt zenner diode.. but I wanted to communicate the idea to everyone.. Maybe you want 16 volts or 12 volts...
@@Inventor_AWthanks for your reply, but what I was thinking is what is the point of having that maximum value adjustable: do you get more accuracy if you keep the highest voltage at 16V instead of 30V or I don't know how high it can go. Could I place a pot with external knob so I can adjust it as needed?
@@alessandroricci7294 Yes, you can use it as a variable voltage source, but the higher the voltage, the lower the ampere
it is quite dangerous to OVERCLOCK the fly power supply at 6 V to 30 V with such a power, the reverse voltage on the output diode will grow (up to 250-300v) and it needs to be changed!
but what is much more dangerous is the gratifying voltage on the 1 winding and the corresponding impuls on the MOSFET DRAIN inside the PWM CHIP! if it exceeds the limit for them (and this is very likely), then there will be a big EXPLOSION and possibly a fire!
but the idea itself is of course interesting, just for the correct and safe release of it, you need to recalculate and rewind the transformer for your new voltage and replace the diode with a corresponding voltage 400-800v ulta fast diode!!!
... and his mounted Resistor is instead of 10 KΩ = 1 KΩ :
brown-black-black x brown ➜ 1-0-0 x 10¹ ≙ 1000 Ω !
And why no one did realize that ! - ? ? { ͡ ๏ ̯͡๏ ?
Yes, it can destroy the mosfet, but the reverse voltage on the output diode will be about 60 v, not 250-300v.
@@mikemir6738why?TheMaxVoltageIs EfectiveVoltage times 1.41 🤔?
@@ovidius2000 On output side U max = 30 V. M1U schematics (wih middle point) : reverse voltage on diode = 2*Umax out. If you have fullbridge rectifier : Urrs = U max out.
Wow it's so awesome. Really I fulfill my all requirement from this project. Thanks to share this knowledgeable video for us.
"The Technical Learner"
( Mr.Chandrakant.S, From India.)
Interesting, but I would have picked a better charger to modify. That's one of those dangerous Chinese suicide chargers that doesn't even have a fuse or interference filter, and if CY1 is really a Y-rated capacitor and not just a 1KV cap I'd be surprised. I don't even like having those things around.
This is a super cool device that I would have had use for recently! Instead, I took LEDs of differing voltage ratings and a whole bunch of resistors to make them equal brightness.
Question: how can this circuit measure the "voltage" of an LED, which obviously can be safely run at different voltages? How does it find the nominal or ideal voltage?
A semiconductor PN junction has a certain forward voltage, depending on physics and chemistry. If you apply a rising voltage to it in the correct direction, nothing happens until that threshold voltage is reached and then current starts to flow. Raising the voltage will dramatically increase the *current* flowing through the junction, while the voltage across remains fairly constant, until it overheats and dies. Here a 10k resistor is put in series to limit the maximum current. The 30V is high enough to turn the PN junction on, which then remains at its forward voltage, with the remainder dissipated across the resistor. The voltmeter simply measures across the PN junction, showing the forward voltage, which is relatively independent of the current.
Well explained
This is an incredible explanation, thank you so much!
Thanks for tutorial yhanks for sharing.. 👍
Earned a sub. Great content!
thank u
Excelent.
thanks
Muito útil o equipamento que construiu!
Desejo-lhe sucesso na vida e sucesso profissional.
Obrigado
That 470 uF 16v cap dies anyway on these units anyway. Even without the mod it’s a good idea to replace it.
I'm assuming he replaced the cap with a higher voltage rated one. Otherwise the original cap would have popped like a party favor when the output was cranked up to max.😳 you could use an LM317 too.
Hi What are the specs of the phone charger you used to build this?
Chinese charger 2 amp
Pregunta este proyecto lo puedo utilizar para el funciomiento de un taladro que consume 18 v.? Muchas gracias desde Cartagena Colombia y muchas bendiciones
No, la corriente a 18 voltios será inferior a 1 amperio.
Do the component values change for 120VAC? I noticed that the unit had a European plug so was probably running on 220VAC @ 50Hz.
no changes
Don't mess around with high voltage ⚡
Maybe he's just giving advice
Gostei muito do projeto, só tenho uma, a fonte utilizada foi de 6v 1A,mas esse projeto eu posso utilizar em outras fontes como de 5v, por que é a fonte mais utilizada nos dias de hoje, ou eu tenho que utilizar o mais próximo do seu projeto, porque eu gostei muito e doido para fazer.
Obrigado por divulgar o seu ótimo trabalho.
Eu te desejo sucesso
Great video thanks! Please can you tell me what model of mobile phone charger was used? My old ones have different PCBs internally...
Chinese charger 5V 2A
@@Inventor_AW Thanks 😊
Hi I wanted to ask what maximum current output would be possible if I use charger 12v 2.5a for this project?
As the voltage increases, the current decreases
Thank You. Could you tell me if this set could handle 6v 5amp or 3v 10amp?
no@@robertmalinowski5451
I wonder how many times you got shocked by the mains during making this.
0
Qual é o objetivo desse tipo ferramenta? Calcular a tensão consumida por determinado componente? No próprio multímetro ja nao é possível fazer isso? Qual a ideia por tras de injetar tensao num componente na placa?
O multímetro não mede o LED mais de 3 volts
can we use lower voltage and amperage adapter? like old nokia charger voltage around 5v and current around 800mA?
Provided that it has the same feedback
@@Inventor_AW sorry didn't get what feedback is?
@@Inventor_AW feedback can only change the voltages according to it's reference, what about the amperage ?
I don't know what was the amperage rating in your modified adapter, how it handled the 15v led bulb load 🤔
I've modified a laptop adapter recently, ratings was 19.7v / 5A. But when I increased the voltage amperage goes lower, and when decreasing the voltage it's came to it's full amperage 5A.
@@atifservicecenter Yes, the voltage rises due to the decrease in the ampere.. But in my project, I used it only to test the zener diode and the LEDs and
this does not require a high current
@@arsalanzia feedback controls the value of the voltage coming out of the transformer.. In the circuit used, the zener diode and the optocoupler represented the feedback
Grazie! Molto utile per scoprire la tensione di qualsiasi LED.
And the fact that the PWM controller will be powered by more than 6 times the increased voltage does not matter?
Sir, the voltage has gone up and the ampere has gone down. As you can see, it is only used for testing and has not been overloaded
I built one, it works well, thank you.
good
Не плохо вы очень просто придумали, как проверять светодиоды сколь они употребляют напряжения, с уважением Евгений. 💯👍
Well done!
Did you just plug into mains voltage to fiddle with it?
I had to test like this so that no one would suspect the video...but I know what to do
Excelente tu proyecto y muy practico.
gracias
Did you solder anything in place of the led?
no
That is nice soldering !
thanks
@@Inventor_AW I have soldered for well over 30 years, no expert, but well trained !
@@andygibson8143 All respect to you sir
Super!
thanks
Bonjour votre montage m'intéresse fortement mais pourriez-vous indiquer la marque et modèle du chargeur car j'en ai déjà démonté plusieurs qui n'ont pas du tout la même configuration. Cordialement
Cette restriction s'applique à tout chargeur doté du même circuit de rétroaction
Excellent work. Great explanation.
thanks
如果一些不常用设备具有一个相通的接口，用它做电源也可以，最好有几个固定档，这样会延长电位器的使用寿命
Simplesmente brilhante a idéia! Só queria saber se podemos fazer com fonte de 5v? Saldaçoēs do Brasil🖒
O importante é que ele contenha um circuito de realimentação semelhante ao que usei no vídeo
Thank you for sharing this video. 👍 👍 👍
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Супер ))) Отличная приспособа получилась !!!
Great video waiting for more
thanks
Please make a video with the installation of components in which a 110v power supply will be used
the same coponents
@@Inventor_AW thanks for the solution
"Watch to the end".
Okay then.
Start watching at 5:10.
There a idea of construction:
Zener diode tester, with 10k series rezistor to DC 30V modified adapter output.
Scheme of TL431 mod: 1:20