[neonixie-l] Re: Constant current source design

A word of caution...the next article in the allaboutcircuits link in Paul's posting discusses current mirrors. You *can* use that technique for multiple anodes with a few caveats 1. If you use the R1//R2 voltage divider, you will need to account for base-current of additional regulators.

[neonixie-l] Re: Constant current source design

I just want to add that for the low current scenario, the voltage should be consumed by the nixie. The voltage across the LM317 will continue to drop with reducing current, down to about 0.75V at 0.2mA under a test I did. Only in overcurrent would there be an issue, as the voltage across it

[neonixie-l] Re: My favorite Nixie tube

There's some interesting tubes for sale on ebay atm. DR-2010 (made in Brasil?), and in light of Tomasz post, some ZM1080

[neonixie-l] Re: Constant current source design

My parts arrived, so I finally got to try it. It actually works! Now on to trying variations - I plan to follow the course here . On Friday, March 24, 2017 at 11:26:32 PM UTC-4, Paul Andrews wrote: > > I wanted to

Re: [neonixie-l] Re: Rare tubes on eBay..

I agree, I can't figure out the market on there sometimes. I mean it's obvious why the larger rare ones go for a ridiculous amount, but I can't imagine paying more than $10 each for these. On Fri, Mar 31, 2017 at 10:31 AM, Nick wrote: > Odd really - they're a nice tube, but

[neonixie-l] Re: Rare tubes on eBay..

Odd really - they're a nice tube, but that's a lot of money for those. Nick (not the Pharma one) -- 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

[neonixie-l] Rare tubes on eBay..

You don't see these everydaylots of interest too.. http://www.ebay.com/itm/252837161607?_trksid=p2050601.m570.l5997&_trkparms=gh1g%3DI252837161607.N34.S1.R1.TR2 http://www.ebay.com/itm/252837150321?_trksid=p2055359.m1431.l2649=STRK%3AMEBIDX%3AIT Not my listing etc etc.. (Pharma) Nick. --

[neonixie-l] Re: Raspberry PI controlled Nixie display

These work great. If anyone wants to try one, I have some extra PCBs I can sell. On Thursday, March 30, 2017 at 6:10:07 AM UTC-4, okniew wrote: > > I also found 1 more place having exactly what I was looking for, although > at a rather steep price.. > >

[neonixie-l] Re: Taylor Edge Nixie Clock Kit

On Friday, March 31, 2017 at 4:42:53 AM UTC-7, Chuck wrote: > > 360 ohms is way too little resistance for *any* sort of > TTL pullup resistor! That apparently got confused with > the standard *pull down* resistor used to keep an unattended > TTL input *low*. 360 ohms for a TTL pulldown is

Re: [neonixie-l] Re: Taylor Edge Nixie Clock Kit

Yeah Chuck.. but the interesting thing is that it is supposedly very closely based on a TI ap note or some such. I was looking forward to some input from the seller. But maybe this is public and wasn't "addressed" to him. Still think it is/was in his interest to comment though. John K -

[neonixie-l] Re: Taylor Edge Nixie Clock Kit

360 ohms is way too little resistance for *any* sort of TTL pullup resistor! That apparently got confused with the standard *pull down* resistor used to keep an unattended TTL input *low*. 360 ohms for a TTL pulldown is just right. 2.2k ohms is the standard value to use as a TTL pullup. That

RE: [neonixie-l] Re: Taylor Edge Nixie Clock Kit

Yep, those old plain 7400 series TTL ics are little juice-hogs! Changing that whole thing over to 74LS is a good idea. The plain old 7400 series TTL works ok, but it hogs a lot more current, and it's also much more susceptible to noise and transient spikes. 74LS series is a vast improvement!