DIY Doctor UK DIY Forums

Posted: **Tue Feb 24, 2009 12:49 pm**

Hi

I need some help. I have a surface mounted down-lighter and wish to place the switch in the output circuit (DC) of the transformer and not in the 240V AC supply to it. Can anyone see any problems with such an arrangement?

Regards

Oldcodger62

Posted: **Tue Feb 24, 2009 8:13 pm**

Hi oldcodger62,
The problem I can see is that your transformer would be constantly on!
KB

Posted: **Wed Feb 25, 2009 9:36 am**

Thanks KB. Appreciate that transformer would be permanently powered as would the rectifying bridge, but with no load on the rectifier when the lamp is off, will this place excess strain on the electronics and possibly shorten it's life?

Regards

Oldcodger62

Posted: **Wed Feb 25, 2009 11:48 am**

your primary would be

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Switching Supplies

Switching Supplies