AC/DC PS using LM2596

[akobari]

Hello all,

I am trying to use Ray’s AC/DC design based on LM2596 which is a very popular switching PS in my project, and I need some help, please, here is the site I am using:
http://rayshobby.net/24vac-to-5vdc-conversion/

I am using 24Ac for power source, I measured the input to LM2596 is around 37 volt DC with no load, which is expected , but when I measured the output volt is about 1.8, it suppose to be 5 volt after 5.6 Zener diode. I have tried at lease 3 different LM2596 and the result were the same! Any hint or clue in this matter would be great.

Thanks

[akobari]

sorry I posted in wrong forum, I meant Hardware section,

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