Re: RS232 and HP49+ or HP50

<blueelectron9@xxxxxxxxxxx> wrote in message
news:t75tp214qgato7ede25irdifl8fgbiiscr@xxxxxxxxxx
On 1 Jan 2007 22:51:50 -0800, "Marten" <marten@xxxxxxxxxxx> wrote:

I've searched in this group, but did not find any working solution -
therefore again this question:

Is there now any suitable hardware solution available to connect to
standard RS232 hardware ?

Found an interesting site that may help us DIY's:

http://www.superdroidrobots.com/shop/category.asp?catid=41

It's a 3.3V/5V TTL to RS232 converter that's built-into the cable
head. Requires external power, which can be provided by the battery
output of the HP50G (perhaps with a diode to limit the 6V to 5.3V).
Should solder directly to a clipped store-bought USB cable.

but wasn't that the "problem" with the 48GII's serial port:
external power neede from PC => no good as a host/controller
on as a slave/client of a PC, (which then provides the power)

Anyway a hardware hack is needed...


.