I use AC drive for multicharacter displays, where there's a definite
gradient from end to end. I use the Si9986 H bridge. It works over the
range 3.5V to 13.5V with TTL level inputs over the whole range.
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On Thursday, July 23, 2015 at 10:38:26 AM UTC-4, Chaos Hydra wrote:
Well, as a newb, I do not how to do AC filament drive so I settled for DC.
Since I will use tube play later on, Would you mind show me some good
resourse explain how to do it? Ｉ appreciate any help!
There used to be nice
On 24 Jul 2015, at 12:01, Terry Kennedy terry+googleb...@tmk.com wrote:
There used to be nice single-chip solutions for this, like the TI LM9022 (now
obsolete, and the wrong output voltage for the IV-4 or -17). As Pete
mentioned, you don't need to do this for small tubes like these. But
Well, as a newb, I do not how to do AC filament drive so I settled for DC.
Since I will use tube play later on, Would you mind show me some good
resourse explain how to do it? Ｉ appreciate any help!
On Thursday, July 23, 2015 at 3:04:04 AM UTC-4, Terry Kennedy wrote:
On Wednesday, July 22,
On Wednesday, July 22, 2015 at 2:12:43 PM UTC-4, Chaos Hydra wrote:
I see what you mean now. Still, I managed to find a regulator chip that
can do the trick, because it take 5V input.
http://www.linear.com/product/LT1587-1.5
Thanks a lot!
If possible, you want to use AC filament drive. DC
Beg pardon. I had originally written 4.7 ohms, changed one instance, not
the other.
On Wednesday, July 22, 2015 at 8:43:22 AM UTC-7, I wrote:
Yellow violet gold ?? Try again. Ira
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Yellow violet gold ?? Try again. Ira
On 7/22/2015 2:59 AM, petehand wrote:
Not quite. The pin 11s go to a (20 divided by 8) ohm resistor, like 2
point 7 ohms. Yellow Violet Gold.
On Tuesday, July 21, 2015 at 6:05:22 AM UTC-7, Chaos Hydra wrote:
Thanks for your reply! Yeah I mean
I see what you mean now. Still, I managed to find a regulator chip that can
do the trick, because it take 5V input.
http://www.linear.com/product/LT1587-1.5
Thanks a lot!
On Wednesday, July 22, 2015 at 5:59:53 AM UTC-4, petehand wrote:
Not quite. The pin 11s go to a (20 divided by 8) ohm
So, for MAX 6931 chip, is it static drive mode or pulse drive mode? My
understanding is static and the Vbb need to be 30 V.
On Wed, Jul 22, 2015 at 11:42 AM, Instrument Resources of America
iracosa...@hughes.net wrote:
Yellow violet gold ?? Try again. Ira
On 7/22/2015 2:59 AM,
Not quite. The pin 11s go to a (20 divided by 8) ohm resistor, like 2 point
7 ohms. Yellow Violet Gold.
On Tuesday, July 21, 2015 at 6:05:22 AM UTC-7, Chaos Hydra wrote:
Thanks for your reply! Yeah I mean pin 12 to 25 VDC, mis-type.
So for the first part. I will have 8 tubes. So I put 47 ohm
Heater voltage, I think you mean. How many are you running? Connect one
heater pin (1 or 11) of each tube to 5V through a 47 ohm resistor, then the
other pin of all of them together to ground through one resistor, of 20
ohms divided by the number of tubes. So for 4 tubes, use a resistor of 20/4
Thanks for your reply! Yeah I mean pin 12 to 25 VDC, mis-type.
So for the first part. I will have 8 tubes. So I put 47 ohm in series with
pin 1 to 5 v and all 8 pin 11s together and through a 20 ohm. Well,
everything gets better when my dmm gets here.
The method of testing you said is great! I
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