As I see it, the base voltage needs to be -5V wrt to the emitter, so if the emitter voltage is 200, then the base voltage needs to be 195. Am I missing something?
> On Apr 1, 2017, at 9:42 AM, JohnK <[email protected]> wrote: > > I suspect that he meant if you wanted the 1ve supply, then the devices he > mentioned give it easily directly from your low voltage supply - I don't > think he meant you to use up your precious High Voltage. Presumably you are > running the high voltage generator DCDC conv off a low voltage? You aren't > getting High Volts dangerously from the mains? > > John K > > > > > ----- Original Message ----- From: "Paul Andrews" <[email protected]> > To: "neonixie-l" <[email protected]> > Sent: Saturday, April 01, 2017 11:51 PM > Subject: [neonixie-l] Re: Constant current source design > > > If I just look at all of the circuit diagrams for various current limiters, > it begins to seem like any combination of a couple of transistors and a bunch > of resistors works! Hence my need to do some 'practicals', it makes me go in > to it all in enough depth to actually begin to understand. > > BTW, how exactly would I drop 5V from 200V using a DCDC converter? I.e. which > converter (part number?) and how would it be wired up (diagrams help, I'm a > visual type of person). > > Thanks in advance. > > Maybe I should just do a masters in electronics. > > -- > You received this message because you are subscribed to the Google Groups > "neonixie-l" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send an email to [email protected]. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/c8b42ecf-2ec3-4b13-9bdf-60756b034537%40googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > > -- > You received this message because you are subscribed to a topic in the Google > Groups "neonixie-l" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/neonixie-l/gbJ0Beiu66I/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > To post to this group, send an email to [email protected]. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/B1651375EFEC4E4096A7089BAAA54BC5%40compunet4f9da9. > For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/6875DA44-C17F-4161-AAE8-AD4B877C89E9%40gmail.com. For more options, visit https://groups.google.com/d/optout.
