Need help wiring this smps transformer.

Thread Starter

psrkallez06

Joined Dec 17, 2015
68
So i found a transformer in my junkbox, the problem is that I've only worked with "normal" transformer, not pcb mounts/smps ones. How do i identify the primary and secondary winding since it has multiple pins? On my other transformers i just measure the resistance and the one with highest is the primary but this doesn't work on this (all pins show 0 resistance)

The transformer i have looks almost exactly like this only different wires on the pins:

http://uk.rs-online.com/web/p/switch-mode-power-supply-smps-transformers/4184073/?origin=null|fp&cm_sp=featureproducts-_-FeaturedProductsContent-_-4184073

Thanks!
 

ronv

Joined Nov 12, 2008
3,770
So i found a transformer in my junkbox, the problem is that I've only worked with "normal" transformer, not pcb mounts/smps ones. How do i identify the primary and secondary winding since it has multiple pins? On my other transformers i just measure the resistance and the one with highest is the primary but this doesn't work on this (all pins show 0 resistance)

The transformer i have looks almost exactly like this only different wires on the pins:

http://uk.rs-online.com/web/p/switch-mode-power-supply-smps-transformers/4184073/?origin=null|fp&cm_sp=featureproducts-_-FeaturedProductsContent-_-4184073

Thanks!
Mabe you could post the picture on this site? I can't get the link to work.
 
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