Calculation of current limiting resistance of light emitting diode

To tell you directly, the plug-in voltage is 220V V v.

Then the resistance of 330K on the LED string with any parameter must be OK, which is a relatively safe number. If 330K is not bright enough, it will be replaced by more than 200K, which is not a big problem. 560K is safer, but the brightness is not very bright.

This is the data I have practiced. If it is useful to you, please take it as the answer.

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