Why did my buck DC-DC converter burn out?

[Floriandu64]

@jim-p

Well you never mentioned that in your original post.
How much current does the LED strip use?

1.1 amp on full duty. However I only plan to power the LED strip with a PWM 20% duty at most.

[Floriandu64]

@jim-p

Maybe you overloaded the buck and the L298

the buck converter is only meant to power the Arduino board, two 20k pots and and a TM1637.

[Floriandu64]

@ZX80

SMPS or linear power supply ?

I guess it's a linear one

[Wawa]

@Floriandu64

I guess it's a linear one

No, universal input voltage (100-240), so SMPS.
Leo..

[gilshultz]

@Floriandu64

I contacted the vendor, who said the problem probably came from a voltage peak on the input side of the transformer I used

What voltage on the power supply does the output measure? The MPSM1586 is only rated for 28 volts input. Using 24 is extremely close. Next go around get something with at least a 40 volt rating or a power supply that puts out less voltage.

[Floriandu64]

Now my strobe light works, I used a 36V -> 5V buck converter.