Anyone use this before?
I registered but it seems sorta hard to get the handle on.
Do they source the components for you via mouser / Digi-key and have the board made in China?
This is the board I'd like to try and make:
A site in Italy has done this but wont sell to the US anymore.
I used these centuries ago:
Why not use a potted dc/dc converter?
Or a SIP 3t switcher?
John Larkin Highland Tech Glen Canyon Design Center Lunatic Fringe Electronics
Not the best circuit in the world. When and if Q3 saturates, C2 will charge to about 12V, and this will become a reverse voltage applied to Q1 EB when Q2 flips. Since VEBO of the 2SC2712 is only guaranteed to be 5V, it may avalanche without current limit, shortening the timing from what they think it should be and reducing the output of the C625/C626 charge pump, lowering the output voltage. And Q2 is probably overstressed by the C625 discharge in the best of circumstances. The circuit is abusing all the transistors and that's why it keeps failing.
I searched Mouser and Digi for one with -6V out, nothing came up.
Dunno what the SIP thing is...?
Right.
There are crazy cheap 3-terminal switchers, intended as replacements for LM317 and 78xx parts. They can do + to - conversions too.
Hmm, it also has a limited input voltage so would have to knock down the 12V input to like 5v with a
7805 or somehting?
Some only ever see problems, while other see solutions.
sometimes if u See the problem....
You BECOME the problem.
Is this what you're referring to?
If they don't ship to the US but do to the UK I could forward it to you if you want.
I got one and put my 5v bench supply into it, its putting out 7.5V
I see they had a 470 ohm resistor in series with the output of the multivibrator, to feed the Zener on the main board the small board is soldered to.
Should I put one of those in series in with the Recom converter to absorb the difference for the Zener?
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