Re: 2018A33 step up converter

In article <nnd$06a1c856$7ded3f70@07ce76ea2de4e870>,
 <albert@spenarnc.xs4all.nl> wrote:

I am experimenting with the 2018 step up converter.
The circuit is available from aliexpress , most everywhere.
>
There is a inductance, a Skottky diode, and capacitance, and the
circuit. The 2018 cuts the coil short to earth. The diode fill the
capacitor and the output is measured for a feedback.
Textbook step up. Rock solid 5 Volt.
>
Now I have this (apparently) wild idea. I add another diode reversed
and a capacitor, to prey on the output. The circuit is not phased at all,
solid 5.08 V as far is it original function.
But I get a couple of negative millivolt out.
>
What am I doing wrong? Or should this work?
I checked this over and over again.

Too late to cancel this post. I discovered that I rectified
the negative swing. Soo embarassed to leave out the charge capacitor.

>
Groetjes Albert

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