[Oberon] Re (2): Re (2): File transfer.

[Tomas Kral]

On Sat, 10 Jun 2017 13:54:29 +0000
"Skulski, Wojciech" <skulski at pas.rochester.edu> wrote:

> 
> > But how about if we really need to connect RS232 signals to USB,
> > because different signal are levels used there.
> 
> > RS232 - "0" ~ -12V, "1" ~ +12V
> > USB   - "0" ~ 0V, "1" ~ +5V
> 
> > I can imagine RS232 -> USB is easy as to dropping voltage from 12V.
> 
> > But how about USB -> RS232? Does not seem possible to transform
> > 5V->12V without external 12V power supply.
> 
> Here is the relevant FTDI cable.
> http://www.ftdichip.com/Products/Cables/USBRS232.htm
> 
> I also attached a schematic page in case you want to build something
> on your own.
> 
> Wojtek
> 
> 
> 

Hi Wojtek,

Nice drawing. What if I needed h/w flow control for some other
non-oberon application. How would the wiring change?

Many thanks

-- 
Tomas Kral <thomas.kral at email.cz>