[neonixie-l] GRA-AFCH 1kOhm Resistor

If you have some different resistors you can experiment a little. Yes their firmware does multiplex the tubes. By doing this the power is already only applied to the tubes 1/4 of the time for 4 tubes or 1/6 of the time for 6 tubes. I have some of their 6 tube clocks. I've seen how they say

Re: [neonixie-l] OT - 20 chr VFDs >blech

I wonder are they individual displays all connected together or do they come apart? If they work it's kinda cool. Bill -- 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

Re: [neonixie-l] Hewlett Packard Power Cord

If this instrument is dual-voltage for 120/240VAC operation, there should not be any issue with hot/neutral being swapped because both leads are hot in the high-voltage case. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from

Re: [neonixie-l] Hewlett Packard Power Cord

Well, that's interesting! I got an old HP 130C 'scope in a pallet of surplus gear, which is in very good condition and works; my plan is to restore it to as close to factory-new as I can. I powered it with clip leads for a while, until the (irritatingly expensive) eBay power cord arrived,

Re: [neonixie-l] OT - 20 chr VFDs >blech

> On 8 May 2019, at 19:01, Dylan Distasio wrote: > > Good point. BTW, just a heads up, but based on the same seller's eBay > listing, it looks like all of these boards being sold were returns initially. Also a good point. I await their arrival to see what dogs I have bought, or not. Best

Re: [neonixie-l] OT - 20 chr VFDs >blech

Good point. BTW, just a heads up, but based on the same seller's eBay listing, it looks like all of these boards being sold were returns initially. https://www.ebay.com/itm/ALVIN-G-DISPLAY-BOARD-untested-PCA-003-pack-of-10-/153370861342 On Wed, May 8, 2019 at 1:47 PM 【ツ】John Smout wrote: > >

Re: [neonixie-l] OT - 20 chr VFDs >blech

> On 8 May 2019, at 18:26, Dylan Distasio wrote: > > Thanks, I was about to place an order but the shipping to the US is extremely > expensive, so now I'm debating (It's $64AUD for the cheapest!). Maybe. With US shipping based on 10 PCBs that is US $4 for each 20 character VFD and people

[neonixie-l] Re: Suggestions for a LiPo powered nixie power supply design?

Interesting point Paul regarding turns ratio. The PA0367 is 1:12, and even though ringing on primary and secondary were small, it was causing havoc with devices methods for measuring primary voltage and secondary current. On Wednesday, May 8, 2019 at 7:45:04 AM UTC-4, Paul Andrews wrote: > > I

[neonixie-l] Re: Suggestions for a LiPo powered nixie power supply design?

Good Point Greg. The LT3420 has Charge (CHG) pin which is essentially an enable/disable. If CHG=HIGH, device charges to set voltage. If CHG=HIGH and voltage is reached, device enters a refresh mode to regulate. CHG=LOW is low power mode. CHG can also be PWM'ed by micro to control input

[neonixie-l] Re: GRA-AFCH 1kOhm Resistor

I suppose the RMS current in each tube is reduced by using PWM. I've only designed+built one clock with IN-18's, and I use direct-drive with a current-regulator set to 5mA, so I cant comment on how well these tubes handle PWM. -- You received this message because you are subscribed to the

Re: [neonixie-l] Re: Hewlett Packard Power Cord

Skycraft is a great site! To bad it's 3,000 miles from me. Better to visit in person I'll bet. On Tue, May 7, 2019 at 6:21 PM Richard Arndt wrote: > You might try a call to SkyCraft Surplus . > They have been around since the 70's. > > > On Tuesday, May 7, 2019 at

[neonixie-l] Re: Suggestions for a LiPo powered nixie power supply design?

I could've sworn I replied to this. Anyway, my design uses an LM3478 and an AO4294 - a combination I have used on many boards with different transformers - and fits on a 17mm diameter board. However driving an IN-18 at 155V/6mA the transformer gets very hot! This particular board doesn't do any

[neonixie-l] Re: Suggestions for a LiPo powered nixie power supply design?

I did some tests with the PA0367 and LT3757 using the datasheet schematic (350V/flyback), regulation was ok but the efficiency was poor, 78% at 5ma/170V with 5V input voltage Am Mittwoch, 8. Mai 2019 02:18:49 UTC+2 schrieb Richard Arndt: > > I've made several PCB design attempts of a small USB