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A PSU controller on a shoestring
A PSU controller on a shoestring
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Old 10th December 2018, 02:28 PM   #11
Elvee is offline Elvee  Belgium
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Quote:
Originally Posted by FauxFrench View Post
Impressively simple. C2 (100nF), first schematic, is that added to slow down the loop?
As Mona hinted, it does rather the opposite: it increases the loop gain of the regulator in AC.
I had to drop it in the final version: it interfered with the ON/OFF circuit

Quote:
Originally Posted by PRR View Post
> the finished GM detector

A "Geiger Counter"?

Here's a clever (no range switch) compact job from long ago.
A neat shortcut indeed, but I wanted to reuse as much as possible the (linear) scales of the salvaged galvanometer, and anyway I preferred explicit controls of the sensitivity and integration time for this one

Quote:
Originally Posted by Ketje View Post
The transformer has a max current independent of the output voltage, so the VxA power will be less with less voltage.
To elaborate, 75% of the nominal voltage means 75% of the power for an ideal transformer, except of course the transformer has a finite regulation, and the I*R drop will remain the same irrespective of the operating voltage.
At low voltages, the proportion of the losses will become increasingly dominant

Quote:
Originally Posted by Ketje View Post
Well, now you are ready when something goes wrong at Doel or Tihange
Or anywhere else in Europe, thus proving that some aspects of the Union actually work....
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