I want to make SMPS power supply.

[zxpa]

I want to make SMPS power supply?

As a beginner I don't know are these circuits are workable?
Please if somebody who has more experience to recommend me the scheme I uploaded here?

All of these schemes are different power.

Is this scheme workable?

Is this scheme workable?

Is this scheme workable?

Is this scheme workable?
Does this EMI filter hase built in NTC resistor?
https://www.tme.eu/en/details/fyb10t1/iec-60320-connectors/yunpen-electronic/

Is this scheme workable?
There is transformer connected at 220V AC
Do I need 150W iron cored transformer for this circuit?

 

[zxpa]

I connected my multimeter to positive and negative rail and set it to measure DC voltage to max 1000V.
I have not connected transformer yet. I have not winded it yet. I am connecting and examinig the circuit step by step.
How I say use light bulb in series to secure each step.

The kickback voltage start happening when I come to step to connect the transistors.

 

[KlausST]

Unclear.

--> mark the position of the connections in a schematic.
Or upload a photo (max 100kBytes) where we can see the whole circuit and especially the connections.

Klaus

 

[zxpa]

 

[KlausST]

Hi,

at this point .... there are two 1000uF in series.
According my understanding it is impossible for "kickback" to generate voltages in the range of 1000V there.

There must be something wrong.


Klaus