/diy/ - Do It Yourself

>>1733113
>they are the same thing
no doubt

>>1530072
See for yourself.

>>1206038
Your text is riddled with misconceptions. A comparator is essentially a 'truncated' opamp (see pic). Both compare the levels at their respective inputs. An opamp does not 'amplify voltage' it can amplify a _signal_ with a definable gain. A comparator cannot do that because it is inherently unstable, by design, but it still amplifies its input signal to switch (!) its output. Without external feedback an opamp acts as a comparator.

Look at the Kodak max circuit above. No opamp, no comparator. But it realizes a comparator function (!) that shuts down the generator when the capacitor is fully charged. How does it do that? What does it compare to what? I'd say get rid of this obsession with specific components, learn to understand circuits at the functional level.

Moral of the story: Knowing the name of X doesn't mean to know X.

>>1206143
>something like pic
Something like that, but not as drawn. If it works at all it will be a very, very 'sparky' affair. Where does this nonsense come from that you need to switch off the capacitor and the primary of the transformer? Wouldn't it be enough to simply stop (open) the 'very speedy' switch for the same result? Also, no one in his right mind would ever connect a comparator input directly to the supply voltage which isn't even within the specified limits. That thing only needs an input difference (!) of a few millivolts to switch its output. Normally you would use something like a Z diode (e.g. 3V3 or less) as a reference and divide the high voltage much further down. Your current values of the divider load the hv output with about 10mA, and 10mA*450V=4.5W, wasted. A typical 9V battery cannot even supply that power.

And on that note, good midnight. I wish you all a steep learning curve and lots of fun with your high voltage experiments. May the spark be with you.