A quick search at Farnell lists the cheapest 34063 at 41p for one and the cheapest 555 at 36p. I just don't get why 555 based supplies are so popular.
On Nov 21, 10:56 pm, "MrNixie (UK)" <[email protected]> wrote: > No doubt these 555 power supplies can work, but the efficiency can be > poor, and there is no current overload protection. If you can live > with the extra wasted power (means a heat sink, for your numbers) and > can trust yourself never to short the power supply out, then these > circuits will deliver. But you will never beat a custom SMPS IC with a > generic 30 year old one IMHO. > > On Nov 21, 5:50 pm, "chuck richards" <[email protected]> wrote: > > > > > > > > > All of the recent discussion about the little boost converter > > HV supply is getting me interested in trying the idea. > > > I looked around on the web and came across a few schematics > > for it. It uses a 555 timer ic as the controller, and I > > see that various frequencies are used. Looks like > > rounding up the FET, the diode, and the inductor would > > be no big deal. > > > But, are these things really any good? Will one of them > > hold decent regulation when running (6) nixies? > > > My estimated total current at 170 volts DC would > > be about 2.2 mA per tube. That would be about 13.2 mA > > total. Is it worth experimenting with? > > > I ask, because it seems quite tough to beat John Taylor's > > model 1363 and 1364 power supplies. I have one of his 1364 > > supplies here, and it's really slick! > > > Thanks. Chuck Richards > > > $4.95/mo. National Dialup, Anti-Spam, Anti-Virus, 5mb personal web space. > > 5x faster dialup for only $9.95/mo. No contracts, No fees, No Kidding! > > Seehttp://www.All2Easy.netformore details! -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
