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kellys_eye · 21st Jun 2018, 9:09 am

Has anyone built their own SMPS? If so, was it from existing plans, self-design or an adaptation of existing device?

I have a number of SMPS transformer cores and quite a few magazine articles relating to SMPS designs - most involving the rewinding of existing cores etc - and I'm considering throwing a few together and looking to avoid pitfalls, both obvious and unintended.

Having a few multi-purpose SMPS units ready for general experimentation seems a practical use of otherwise 'junk' parts and I'm thinking along the lines of them all being 12V input (only because I don't like the idea of a bridge rectified mains source) and having outputs such as 90V/1.5V (battery eliminator), 250V/6.3V (general valve experimenting) and 24V-36V (@10A) for some testing/repair work I have lined up.

Pointers to reliable (i.e. known-to-work) designs and/or advice on avoiding aforementioned pitfalls would be appreciated.

21st Jun 2018, 9:09 am	#1
kellys_eye Octode Join Date: Jan 2014 Location: Oban, Scotland, UK. Posts: 1,129	Switched Mode Power Supplies Has anyone built their own SMPS? If so, was it from existing plans, self-design or an adaptation of existing device? I have a number of SMPS transformer cores and quite a few magazine articles relating to SMPS designs - most involving the rewinding of existing cores etc - and I'm considering throwing a few together and looking to avoid pitfalls, both obvious and unintended. Having a few multi-purpose SMPS units ready for general experimentation seems a practical use of otherwise 'junk' parts and I'm thinking along the lines of them all being 12V input (only because I don't like the idea of a bridge rectified mains source) and having outputs such as 90V/1.5V (battery eliminator), 250V/6.3V (general valve experimenting) and 24V-36V (@10A) for some testing/repair work I have lined up. Pointers to reliable (i.e. known-to-work) designs and/or advice on avoiding aforementioned pitfalls would be appreciated.