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93 wiersze
4.1 KiB
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<!-- received="Sun Sep 6 02:17:03 1998 PDT" -->
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<!-- sent="Sun, 06 Sep 1998 11:15:48 +0200" -->
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<!-- name="Bostjan Lemut" -->
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<!-- email="Bostjan.Lemut@klub-kas.si" -->
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<!-- subject="Re: How to build a db25 terminator" -->
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<!-- inreplyto="How to build a db25 terminator" -->
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<title>sane-devel: Re: How to build a db25 terminator</title>
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<h1>Re: How to build a db25 terminator</h1>
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<b>Bostjan Lemut</b> (<a href="mailto:Bostjan.Lemut@klub-kas.si"><i>Bostjan.Lemut@klub-kas.si</i></a>)<br>
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<i>Sun, 06 Sep 1998 11:15:48 +0200</i>
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<p>
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<ul>
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<li> <b>Messages sorted by:</b> <a href="date.html#43">[ date ]</a><a href="index.html#43">[ thread ]</a><a href="subject.html#43">[ subject ]</a><a href="author.html#43">[ author ]</a>
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<!-- next="start" -->
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<li> <b>Next message:</b> <a href="0044.html">Paul Clark: "Re: Mustek 600 II CD - y limit"</a>
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<li> <b>Previous message:</b> <a href="0042.html">Kurt Schafer: "Dexxa Flatbed Scanner 4800 support?"</a>
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<li> <b>Maybe in reply to:</b> <a href="0034.html">Bostjan Lemut: "How to build a db25 terminator"</a>
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<!-- nextthread="start" -->
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<li> <b>Next in thread:</b> <a href="0050.html">Bostjan Lemut: "Re: How to build a db25 terminator"</a>
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<!-- reply="end" -->
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</ul>
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<!-- body="start" -->
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Rogier Wolff wrote:<br>
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<p>
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<i>> Bostjan Lemut wrote:</i><br>
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<i>> [Charset iso-8859-2 unsupported, filtering to ASCII...]</i><br>
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<i>> > Hi!</i><br>
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<i>> ></i><br>
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<i>> > I've bought a second-hand UMAX Astra 600S scanner, but it came without</i><br>
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<i>> > terminator (the scanner won't work without it). Since I can't buy it in</i><br>
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<i>> > any computer shop in our country (it's very small one), I decided to</i><br>
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<i>> > make one by myself. The problem is, i can't find a scheme on the WEB.</i><br>
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<i>> ></i><br>
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<i>> > I would be very greatful if anyone send me the scheme how to build the</i><br>
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<i>> > damn terminator.</i><br>
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<i>></i><br>
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<i>> +5V</i><br>
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<i>> |</i><br>
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<i>> |</i><br>
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<i>> |-|</i><br>
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<i>> | | 220 Ohm</i><br>
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<i>> |_|</i><br>
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<i>> |</i><br>
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<i>> Signal ---------+</i><br>
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<i>> |</i><br>
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<i>> |-|</i><br>
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<i>> | | 330 Ohm.</i><br>
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<i>> |_|</i><br>
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<i>> |</i><br>
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<i>> |</i><br>
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<i>> GND</i><br>
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<i>></i><br>
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<i>> I don't know what the signal lines are on a DB25 SCSI connector.</i><br>
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<i>></i><br>
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<i>> Roger.</i><br>
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<p>
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Hmmmm, I've done some measurment on centronix to db25 adapter and I came out with<br>
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a strange results:<br>
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according to connections, the signals DB0,1 joins to one pin on db25, also<br>
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signals 2,3,4 and 5,6,7 to the third pin<br>
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also some control signals join on the gnd.<br>
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<p>
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I also borrowed a terminator and I measured resistance between some pins. As<br>
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expected, between pins wich carry db signals, and +5 (assuming) i get 136 ohms,<br>
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but on other (i/o) and similar pins I got some weird resistance.<br>
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So, could you explain what is ment with "signal" in the resistance scheme. Is it<br>
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a DB signal or any signal.<br>
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<p>
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Any other suggestions?<br>
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<p>
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Thanks,<br>
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<p>
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Bostjan<br>
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<p>
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<p>
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<pre>
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--
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Source code, list archive, and docs: <a href="http://www.mostang.com/sane/">http://www.mostang.com/sane/</a>
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To unsubscribe: echo unsubscribe sane-devel | mail <a href="mailto:majordomo@mostang.com">majordomo@mostang.com</a>
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</pre>
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<!-- body="end" -->
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<p>
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<ul>
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<!-- next="start" -->
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<li> <b>Next message:</b> <a href="0044.html">Paul Clark: "Re: Mustek 600 II CD - y limit"</a>
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|
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<li> <b>Previous message:</b> <a href="0042.html">Kurt Schafer: "Dexxa Flatbed Scanner 4800 support?"</a>
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<li> <b>Maybe in reply to:</b> <a href="0034.html">Bostjan Lemut: "How to build a db25 terminator"</a>
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<!-- nextthread="start" -->
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<li> <b>Next in thread:</b> <a href="0050.html">Bostjan Lemut: "Re: How to build a db25 terminator"</a>
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<!-- reply="end" -->
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</ul>
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