2011 July 12

Long USB cable problem solved

Filed under: Robotics,Underwater ROV — gasstationwithoutpumps @ 22:07
Tags: , , ,

I posted a couple of days ago about determining that the USB cable-length limit is real, and needing to get a USB-CAT5-USB converter. I found a couple for only $8 (and free shipping) from “bargain cable” sold through Amazon.  I ordered one of each, and they came today (order on Sunday, delivered on Tuesday is pretty good turnaround!).

Although the two parts I ordered had different prices:

HDE USB over Cat5/5e/6 Extension Cable RJ45 Adapter Set    Sold by: bargain cable    $8.60 each
USB over Cat5/5e/6 Extension Cable RJ45 Adapter Set    Sold by: bargain cable    $7.99 each

they were identical.  The prices seem to be different today also, but within a few cents.

There is one minor problem:  there is not a USB type-B connector on the slave end, but a USB female type-A.  This is easily fixed (just plug in a standard USB A-to-B cable), but it does indicate sloppy engineering.

50' CAT5 patch cable

I tried hooking one set up with a 50′ CAT-5 patch cable (under $5 from Parts Express) that we are likely to use as part of the ROVtether. I had no trouble downloading Arduino programs or getting data back at 115200 baud—even powering the Arduino over the cable worked fine. So that seems to be one big problem solved very cheaply! I love it when off-the-shelf cheap parts do exactly what I need.



  1. […] they will need several IP-68 connectors for the tether power, for the tether CAT-5 cable (see Long USB cable problem solved), for the motors, and for whatever suite of tools they build for this year’s challenge.  I […]

    Pingback by Pressure sensor « karplus4arduino — 2011 August 14 @ 22:05 | Reply

  2. […] pushing it. One solution that is apparently simple is to put a piece of ethernet cable in between (Long USB cable problem solved | karplus4arduino and Long USB cables | karplus4arduino). Did you consider using VNC instead? A light weight thing […]

    Pingback by USB trouble with ZWO cam — 2014 June 29 @ 08:42 | Reply

RSS feed for comments on this post. TrackBack URI

Leave a Reply

Please log in using one of these methods to post your comment:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )


Connecting to %s

Blog at WordPress.com.

%d bloggers like this: