[amsat-bb] FT736R cable
dan at post.com
Tue Mar 24 12:47:19 UTC 2015
On 24/03/2015, Andre <sats at pe1rdw.demon.nl> wrote:
> If fyou are going to homebuild you can skip the whole level shifter and
> Just get a usb to ttl cable an attacht the needed connector to the open
> end of the cable.
Just be aware, as already said the signal is INVERTED so a 1 is a 0
and a 0 is a 1, so the logic level needs to be the opposite of normal
RS232 TTL levels, so connecting a standard 5V TTL to a connector
probably will not work with a circuit to invert the logic.
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