Only lift the transmitter output. Note that by design, 232 ports can be floated. Receivers all have pull-down resistors. For much of the world today, if they have a 232 port, it is floating.
A little heat and exacto knife should lift the pin just fine. I've done this before. It helps to own a stereo microscope. -----Original Message----- From: Robert LaJeunesse <[email protected]> Date: Thu, 28 Jul 2011 10:51:25 To: <[email protected]>; Discussion of precise time and frequency measurement<[email protected]> Subject: Re: [time-nuts] Electronics Question Lifting "a pin" often causes it to break off. May as well pull the part for later reuse. Agree on the inversion issue. One needs to be careful as 3.3V CMOS logic is usually not (or "not exactly") TTL compatible. Crossing power supply boundaries means having to assure the associated pins are not unhappy - i.e. drawing excess current - when either supply is missing. ________________________________ From: "[email protected]" <[email protected]> To: Discussion of precise time and frequency measurement <[email protected]> Sent: Thu, July 28, 2011 1:39:06 PM Subject: Re: [time-nuts] Electronics Question Technically, he just has to lift the offending pins. My recollection is the transmitters invert, so that might be an issue. _______________________________________________ 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.
