Re: [neonixie-l] Re: New single tube clock - Hivac GR10J rarity
Hi John, No scaling of the pictures. And the GR10 is no broad, she's a lady, and a royal one at that. No arguments here ;-) I should have been more specific: on the pictures everything seems fine, but the video was where I thought the scaling might have been changed. Maybe it is just an illusion because the image is so wide. Best regards, Jens -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
Re: [neonixie-l] Nixie Tube Power Supply: 0..300V @ 30mA max.
Hi all, there actually was a problem with my first design, as some folks pointed out to me: http://www.jb-electronics.de/tmp/400v_adjustable.png The PNP transistor (whichever type) will always conduct because the 5V from the PWM will never lock the transistor, it is by far not close enough to +400V. I should've seen that. This is why I added this level shift stage, based on a MPSA42 (Q2) for example: http://www.jb-electronics.de/tmp/400v_adjustable_2.png What do you think? Best regards, Jens -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
[neonixie-l] Re: How often does a 74141 go bad, or arrive dead?
But the powersupply, which is the simplest part of Mike's circuit, would need a complete overhaul. TTL parts need a solid +5vdc and won't work with Mike's unisolated zener shunt logic supply. Also, as you say, the 74142 won't work at the 250vdc provided by the unisolated DC doubler circuit. Probably I'd do the AC wall-wart, 7805 (or bucking switcher) boost switching supply... That right there takes away a lot of the simplicity that the 74142's add to the circuit.. One can always use the back-to-back transformer trick. 220V:6V - 9V:220V will give about 180VAC 220V:6V - 12V:220V will give about 110 VAC Simplicity itself, and if one adds a nice tube shunt regulator, 2x0B2 in series, it has a +10 in coolness :) Gastón -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
Re: [neonixie-l] Re: How often does a 74141 go bad, or arrive dead?
I might just have to add some 0B2's to a nixie clock just for the coolness factor now. :) Antique Electronics Supply has them for $6 each. :) -Adam On 7/27/2011 5:44 AM, GastonP wrote: Simplicity itself, and if one adds a nice tube shunt regulator, 2x0B2 in series, it has a +10 in coolness :) -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
[neonixie-l] mm5311
i made a nixie clock using the MM5309 chip using the BCD out to drive a 74141 my question is ... i cant seem to get the nixies to display very bright i did have to play with the c and r values to get it to look readable but i would like it brighter has any one ever used the mm5309 or mm5314 chips thanks jerry -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
Re: [neonixie-l] mm5311
On 7/27/2011 6:26 PM, jerry kimento wrote: i made a nixie clock using the MM5309 chip using the BCD out to drive a 74141 my question is ... i cant seem to get the nixies to display very bright i did have to play with the c and r values to get it to look readable but i would like it brighter has any one ever used the mm5309 or mm5314 chips thanks jerry Jerry, Nixie power supply voltage? Anode resistor value? Type of nixie tubes? -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
[neonixie-l] Re: mm5311
On Jul 27, 6:26 pm, jerry kimento wb9...@gmail.com wrote: has any one ever used the mm5309 or mm5314 chips Sure. Burroughs used the MM5314 in their SP332 Panaplex clock kit. It works OK, except that it teded to run fast. Rightly or wrongly, I attributed it to inadequate noise filtering on the 60Hz derived from the mains, allowing extraneous additional pulses to get sent to the chip. -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
