Hello again,
I just thought I'd let people know that I've updated my webpage on the
SDCharger. Basically the news is that it's now on a PCB and supports the
64K Megaboy cart as well.
http://www.schells.com/sdcharger.shtml
I'd also like to ask an electronics question to the list, although I
suppose it is slightly off topic. I have problems with the audio cable
being an antenna for RF noise on the SDC. In fact, this same antenna
effect can be created on just about any atari cart by connecting a long
lead to ground. However, the Supercharger itself seems quite immune to
this noise, they've obviously put in some nice noise rejection features.
I know that it's not the loops drawn on the PCB as the audio signal comes
in from the cable, as connecting cables to ground on other points do no
inject any noise.
So any thoughts as to what's their trick?
Or, for that matter, does anyone have a GREAT circuit for converting audio
to digital signals using a single power supply. Also, it must preserve the
50% duty cycle, as the supercharger audio formats are quite sensitive to
this aspect.
Thanks,
Chad
============================================
Chad Schell
gamer@xxxxxxxxxxx
Like the Intellivision? Check out the Intellicart.
http://www.schells.com/intellicart.shtml
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