Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!uunet!seismo!lll-lcc!ames!sdcsvax!ucsdhub!jack!man!crash!pnet01!rpluth From: rpluth@pnet01.CTS.COM (Ron Pluth) Newsgroups: sci.electronics Subject: TTL Questions Message-ID: <1395@crash.CTS.COM> Date: Thu, 16-Jul-87 20:56:27 EDT Article-I.D.: crash.1395 Posted: Thu Jul 16 20:56:27 1987 Date-Received: Sat, 18-Jul-87 11:18:56 EDT Sender: news@crash.CTS.COM Organization: People-Net [pnet01], El Cajon, CA Lines: 29 I have a couple questions about TTL logic that I hope can be answered here... 1. What's the easiest way to go about interfacing a TTL output (from, say, a standard S or LS AND gate) to a relay, for controlling anything from automobile (12VDC) to house (120VAC) environments? These are two *different* situations. I'm look ing for hardware that can be easily picked up at Radio Shack (gasp!)... if anyone would even happen to know part numbers from such equipment, this would also be great. 2. I've worked with Schottky and Low-power Schottky logic chips in the lab, and have seen that a no connection to inputs, such as a simple AND or OR gate, even sometimes in MUX's and others, drives the input high. Is this guaranteed true? If so, does it apply to all families (S, LS, CMOS, etc.)? I'm working on projects that would be a heck of a lot easier if this were true. Send messages to sci.electronics or directly to me. Any information is greatly appreciated! Ron Pluth UUCP: {akgua, hplabs!hp-sdd, sdcsvax, nosc} | "We are all in the gutter, !crash!pnet01!rpluth | but some of us are looking ARPA: crash!pnet01!rpluth@nosc.mil | at the stars." INET: rpluth@pnet01.CTS.COM | -Oscar Wilde USPS: 13704 Celestial Rd. Poway, CA 92064 |