No, you can't simply wire two logic outputs together. One or the other logic state is "stronger" (Yes I know poor analogy) and "wins". The details are here. http://en.wikipedia.org/wiki/Wired_logic_connection
But it is pretty easy to remove a chip especially if you don't care if you damage it. The classic method is to clip all the leads from the IC toss out the chip then de-solder the leads one at a time. When chips cost 2 cents it's better to trash them than waste time with complex rework methods. (Different story for expensive parts.) On Wed, Jul 27, 2011 at 1:48 PM, Jason Rabel <[email protected]> wrote: > This is only pseudo time-nuts related... > > I'm wiring up (yet another) net4501 with a Motorola M12 GPS.. > > This net4501 has the RS232 driver chip there for the 2nd serial port > (previous units I purchased didn't, which made life easier for > me). > > Can I solder my GPS tx/rx lines on the ttl side of the RS232 chip and will it > work? Or will the rs232 chip hold the voltages > low/high because there is no signal on the input sides? > > This is just kind of "for future reference" question. I half wasn't sure if > it would work, and half didn't care to try and solder a > wire to a TSOP lead. So I bought a Max3222 PDIP and can make a proper > interface. The prototype board will also give me room for some > extra LEDs. ;) > > This is kind of an experiment to see how a regular M12 compares to the M12+T > for NTP purposes. I'll probably build a fresh NanoBSD > image because I need to modify a line of code in NTPns to remove a TRAIM > command that makes the regular M12 PPS stop. I also want to > build the latest regular NTP distro. > > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > -- Chris Albertson Redondo Beach, California _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
