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#33426 - 27/06/2001 20:54 Strange VFD Activity
xanatos
enthusiast

Registered: 08/03/2001
Posts: 202
Loc: Denver, CO
So I just took off the fasica and the screen and I noticed something a little strange.... It appears that some pixels are ligting up VERY faintly in a pattern counting along with the seconds. Lets see if I can explain this.

4x26 thru 4x31 are slightly (very VERY dimly) illuminated. and they change pattern depending on what second count the song is at.

I wouldn't consider this a bug, but I just wanted to see if anyone else noticed this.

Later,

Damien Heiser

RioCar 12GB Blue SN: 120001043
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- Damien - Mk2a 24G Blue SN: 120001043

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#33427 - 28/06/2001 00:37 Re: Strange VFD Activity [Re: xanatos]
altman
carpal tunnel

Registered: 19/05/1999
Posts: 3457
Loc: Palo Alto, CA
I believe this is just a side-effect of the way the VFD is designed; the pixels are clocked into every column pair for each of the 64 columns; however, only two grids above a column pair are powered.

Any stray electrical fields (and that may include circuitry below the display) could in theory cause enough electron movement to give a dim glow in other columns

Hugo



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