Has anyone trie to make their own RJ11 > USB interface ca

Gawdo · Occasional Visitor Joined: Oct 04, 2004 Posts: 4

I already have the 9532 Y interface cable for my HP 5410 for in the car, however I would like to take my laptop for longer trips in either the boat/car for when I need a larger screen for more detailed topographic/navigational charts than the PDA can display.

Looking at the pin diagram for the 9532 the RJ11 has 4 pins (VCC 5v, Data In, Data Out, Ground) and USB has 4 pins (VCC 5v, Data-, Data+, Ground) I have no intention of cutting one of my USB cables and crimping an RJ11 socket to the end and plugging my GPS in just yet, so I was wondering if anyone has tried to make this type of cable yet?

Something tells me there are inline diodes/resistors/fuses on the commercial cable from Leadtek, but my optomistic side is hoping its just as simple as cutting the end off a usb and crimping an RJ11 on.

Gawdo · Occasional Visitor Joined: Oct 04, 2004 Posts: 4

4550 not 5410 ... dammit dyslexic fingers.

ljhamilton · Occasional Visitor Joined: Jul 04, 2005 Posts: 8

Just tried it, ripped a RJ11 socket out of an old telephone, cut up a brnad spanking new USB cable, scoured the internet trying to get the pinouts. Made the cable and nothing. USB detected something there for a second, but that was it. Looks like its back to the drawing board.

simontdc · Posted: Wed Aug 10, 2005 10:44 am Post subject:

RJ11 connections are RS232 at 12V, USB is 5V, so don't do it again, or you might blow something up! 8O
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G1NTX AFRIN LRPS

vlad_br · Posted: Sun Nov 26, 2006 3:02 am Post subject:

Hi, if the leadtek 9532 output is serial (thru rj11), is it possible to use a cable that converts the rj11 to rs232 (9 pin)? Idea

If the cable works, the PC software should just try to read from the COM port.

I need to know that, because its impossible to find a cable from rj11 to usb :x , so I may go for rj11 to rs232 for the pc serial port. Rolling Eyes

Thanks a lot,
Vladimir

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