[rescue] Anyone build this kit?

[Doug McIntyre]

On Sat, Nov 13, 2021 at 05:49:22PM -0500, Andy Wallis wrote:
> If you set the serial kit to RS232, nothing will come up. If I set the
> option for TTL, you'll get different character glyphs based on if the
> character set is set to UTF-8, ISO-8851, or IBM-437 encodings. It's
> possible that I have a bad solder somewhere, but everything else comes up
> fine.


I've seen serial TTL levels be either 3.3V or 5.0V.
Are you matching your TTL voltage levels correctly with your RS232 adapter?

I have an RS232 adapter that jumpers for 3 settings, it even does 1.8V TTL,
but I don't know what equipment that works with. I do have some gear that
does 5V TTL, and some that are 3.3V TTL, so the jumpering comes in handy. 

It sounds a bit like like an undervoltage threshold garbage.