Hi Jason,
A schematic would tell a lot more.
Fading is often done in software, by PWM drive of the tube.
This method also allows for crossfading of digits. Don't know
if folks want to that by fiddling with the supply voltage going to
all tubes.
How do you regulate the voltage? Would like to see that.
You mention HV transistors, do you mean you have a linear
regulator made of some HV transistors, fed from a constant
voltage which is set by a pot? If so, what about dissipation
in those transisors?
Your description is rather vague. I have to do a lot of guessing
and actually makes me worry that your design is not as good as you
make it sound. You don't tell us the maximum current it can
deliver at let's say 180V. A quick test that it delivers 7.2mA
is not very convincing. And 'only limited by traces and components'
applies to every power supply I know of.
Give the schematic and full specs, and let the folks here do the
comparison...
Cheers, Frank
----- Original Message -----
From: "jason greskoviak" <[email protected]>
To: "neonixie-l" <[email protected]>
Sent: Tuesday, April 05, 2011 5:08 PM
Subject: [neonixie-l] Re: Nixie Tube Power Supply
I also looked at Taylor's board and a few things stand out between the
two. Yes his board is much smaller, but you need external components
for voltage adjust. Mine is on board with a 2mm pot for adjustment in
the range of the selected voltage. I.E. 100 to 50 or 150 to 200. his
enable is either on or off, mine is driving some HV transistors so you
can vary the enable to achieve a "glowing/fading" effect. his does go
lower in voltage- from 2 volts, but i cant see driving it that low.
mine works well from 9-16v. I guess the biggest feature for mine is
the pwm feature. And that it's an all in one solution. drop it in the
breadboard or design it into your circuit. More work will definitely
need to be done to get some hard specs. I need to build a few more to
play with. right now i have 1.
Jason
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