CodePudding user response:

R56 how much, how much load

CodePudding user response:

R5 is 2.49 k, R6 is 2.4 k, load is 5 v microcontroller

CodePudding user response:

High-frequency transformer magnetic gap is too big, too much or secondary turns,

L1 is not power inductor!!!!!!

More likely

CodePudding user response:

Today just to do the test, a light-emitting diode and 3 k resistance and voltage is normal, but a connected to microcontroller voltage was reduced, could it be the problem of load