When I connected this flyback power supply,
the chip emitted an arc, the optocoupler still blackened.
Strangely it survived, while the LNK363 broke into two pieces.
I don't know what I have done wrong.
Maybe the two primary windings (two layers) were connected in series in a wrong way?
Or the chip's own power supply does not like the fact only having one rectifying diode.
I only use one of the primary windings now. One layer fine wire! While the primary is one layer thick wire, It is visible in the picture. Between the layers, electrical tape is used for isolation.
It works now!
-Not a LED to mains, at least it is isolated.
-Not transformerless, it is a full isolation transformer. I never built one until today. No calculations were made.
But I am not sure how to connect the wires, if multiple layers are used. Isn't it true, one wire runs straight reverse, and then the second layer is added, having the same orientation? But then I don't understand why a large arc occured, and the chip was destroyed. It works fine now having only one layer.
Maybe the small CFL coil I inlined was bad? There should be 1mH to filter EMI. And these coils have 2mH or the like.
My question is mainly how to wind transformers, so it's independent from voltages.
Also this is not meant to be for permanent use, not at all. I have placed it on the big transformer box because there are no clean surfaces nowhere, and pieces of metal on the floor. There is no correlation intended. But isn't it boring only to read some question and not to see the subject in question?
the chip emitted an arc, the optocoupler still blackened.
Strangely it survived, while the LNK363 broke into two pieces.
I don't know what I have done wrong.
Maybe the two primary windings (two layers) were connected in series in a wrong way?
Or the chip's own power supply does not like the fact only having one rectifying diode.
I only use one of the primary windings now. One layer fine wire! While the primary is one layer thick wire, It is visible in the picture. Between the layers, electrical tape is used for isolation.
It works now!
-Not a LED to mains, at least it is isolated.
-Not transformerless, it is a full isolation transformer. I never built one until today. No calculations were made.
But I am not sure how to connect the wires, if multiple layers are used. Isn't it true, one wire runs straight reverse, and then the second layer is added, having the same orientation? But then I don't understand why a large arc occured, and the chip was destroyed. It works fine now having only one layer.
Maybe the small CFL coil I inlined was bad? There should be 1mH to filter EMI. And these coils have 2mH or the like.
My question is mainly how to wind transformers, so it's independent from voltages.
Also this is not meant to be for permanent use, not at all. I have placed it on the big transformer box because there are no clean surfaces nowhere, and pieces of metal on the floor. There is no correlation intended. But isn't it boring only to read some question and not to see the subject in question?
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