[1000mp] MAX232 replacement.... not a big deal.

[Mark Marsden]

Hi all

I developed an opto USB RS232 interface for the MP for my keyer, if you
want to make your own have a look at the schematic on
http://granta.digital-crocus.com/USB_Voice_Keyer.php3

73, Mark G4AXX

-----Original Message-----
From: 1000mp-bounces at mailman.qth.net
[mailto:1000mp-bounces at mailman.qth.net] On Behalf Of PA5CA Frans
Sent: 28 August 2006 22:15
To: 1000mp at mailman.qth.net
Subject: [1000mp] MAX232 replacement.... not a big deal.

Dear Guido,

Thanks for the excellent input for the CAT users however I need to make
one little remark on the schematics.

In your drawing you are feeding the OPTO"s from the RS232 port. we know
from experience that some RS232 ports do not deliver enough current, so
I designed an interface which ccan handle that phenomenon.

It is a pitty that I can not up-load schematics so I 'll  place modified
schematics on the PA6Z home page.



Please note that you may read the text at
http://www.pa6z.nl/PROJECTS/INTERFACE_v2/interface_v2.html first.

After reading this part go to the following link with the modified
schematics for the FT1000mp.xx

The URL will be www.pa6z.nl/ft1000mp.html



Good luck... and have fun.



De PA5CA Frans.......73


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