Re: [Gumstix-users] Re: Suggestions for hardware configuration

[Dave H. <dhy...@gm...>]

> > TTL-level =3D=3D +/- 5V
> > RS232-level =3D=3D +/- 12V
>
> TTL =3D 3.3V
> RS232 =3D 5V

Actually, on the gumstix breakout boards and waysmall, TTL =3D 3.3v. On
the robostix, TTL =3D 5v.

RS-232 is actually a range. Logic 0 is +3v to +12v and logic 1 is -3v
to -12v, although many devices treat Logic 0 as 0v to +12v.

--
Dave Hylands
Vancouver, BC, Canada
http://www.DaveHylands.com/