erenhdhjd

modified 7 years ago

320volt to 12 volt

329

03:49:44

No smps 

published 7 years ago

hurz

7 years ago

How much load is allowed to this PSU? The 1kOhm resistor at the 13V zener must be a 100Watt heater, doesn't look very efficient!

eekee

7 years ago

Ouch! Yes, 306mA squared times 1kR = 94W (approx). Some component adjustment required. :)

erenhdhjd

7 years ago

I tried to redo the circuit again if you study whether there is a problem in this real life yapıcam full mje13007 trsasitor kunlanacam

erenhdhjd

7 years ago

mje13007 has better transistor

hurz

7 years ago

mje13007 i know from CFLs and can take some power at those voltages. It all depends what load you plan to add. The resistors are now a little more then 1Watt, why not

erenhdhjd

7 years ago

I want to make this circuit structure tda7375a la kunlamom room is healthy

hurz

7 years ago

So a 2x 37W audio amplifier without galvanic separation to mains???? Oh no, please use a transformer or switched PSU but not this methode to power an amplifier with all its lousy isolated cabels to the loudspeaker.

erenhdhjd

7 years ago

what can i do without transformer

hurz

7 years ago

Buy one

erenhdhjd

7 years ago

😲😲😲

hurz

7 years ago

So 12V at 2Ohm is as bridged amplifier 36W Its only 37W for marketing purpose were they calculate with 10% distortion. Without distortion you can only get 36W in best case. So buy a 5A 12V power supply switched mode which you can get cheap. With some extra filtering you can get a good quality audio amp for two times 4Ohm output. So 2 × 18Watt

erenhdhjd

7 years ago

alabirisi dionda class teacher claimed 10 minutes 15 minutes calissin enough

erenhdhjd

7 years ago

There is 12v 50a

hurz

7 years ago

???

erenhdhjd

7 years ago

google converts yanis translates

hurz

7 years ago

As i expected, google cant help to translate that. A little more care on your side is needed to understand what you are talking. And whats that “there is 12V 50a“ you mean there are power supplies 12V 50Ampere ? Right, and even bigger, but does it help you?

hurz

7 years ago

“alabirisi dionda class teacher claimed 10 minutes 15 minutes calissin enough“ ????

hurz

7 years ago

The teacher claimed what?

erenhdhjd

7 years ago

google ceviri yapiyorum ingilizce bilmiyorum

erenhdhjd

7 years ago

Yes

erenhdhjd

7 years ago

I tried the circuit and it exploded at 0.5.

hurz

7 years ago

Simulation already showed you why. There was no need to built it in real. (320V - 12V) × Loadcurrent = dissipation power of your final transistor. E.g. load 1A results in more then 300W HEAT AND A BIG BANG !

erenhdhjd

7 years ago

MJ15003 x 5

hurz

7 years ago

Check the specification and see they are not made for 320V !

erenhdhjd

7 years ago

Mje13009 x7

hurz

7 years ago

Doesn't matter how many transistors you use, for every ampere you get out you burn 320W into heat. If you spilt it on 7 transistors they might survive, but its highly inefficient to transform 320W into heat to get 12W for audio ! E.g. for 36W audio (3A) you will burn almost 1000W !!!!

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