Re: on winding a transformer

mrdarrett@[EMAIL PROTECTED]
 wrote:

> Yep, same project, and learning is the main objective (along with
> powering an LM3886 someday).
>
> I already built a boost power supply with a 555 switching the same
> inductor, pulsing at 100 Hz.  It provided about 100VDC (!!), powered a
> 4W 120V night light, and heated my TIP31As (but not my IRF530 - guess
> the R_ds_on, was lower than the resistance of the TIP31A).
>
> I've learned loads since the boost converter project, and I'm still
> learning.
>
> I'm using a 12V battery as a starting point - safer than a first
> homemade switcher powered by the mains.

Flyback converters are a completely different fish from forward
converters.

Power Integrations (powerint.com ?) has a wealth of application notes
obviously
targeted at their own parts yet which are incredibly useful for learning
about
switching supplies.

Graham