raschemmel:
I have been a forum member since 2013 so I know what the toolbuttons look like because I use them on my computer but as I said they don't exist on my phone.
Im curious what kind of phone you are using, since both my phone and tablet definitely have access to the tool buttons.
raschemmel:
FYI, the cable you linked ("this one") is a SERIAL printer cable and your post Title is "LPT parallel printer cable" which , not to be cliche is "apples" and "oranges" because the only thing those two cables have in common is the word "printer" in their name. Everything else about them is different. Zapro's reply (the first reply to your post) was correct. He stated that the typical printer cable (meaning the type of cable described by your post title) has a DB25 at one end and a Centronics connector at the other end. The serial printer cable you just linked is NOT the cable described by your post titile because they are ad different as a prop plane vs a jet plane. They might both have wings and fly but other than that they are very different, so now would be a good time for you to set the record straight. Are you talking about a Serial printer cable OR the LPT Parallel Printer described in your post title (the one with a DB25 at one end and a Centronics connector at the other ? Did we waste all that time talking about the standard LPT Parallel Printer cable described in your post title ?
I guess I was mistaken in the name of the cable; I don't want centronics, I don't want crossed wires, I don't want jumped pins. I just want two 25 pin connectors with a clean connection between them. Whatever that may be called.
The Arduino comes into play because I am looking to interface my arduino mega controlbox with an AC power outlet relay box that is about 4ft away from it, as mentioned in the opening post.
Sokonomi:
I just want two 25 pin connectors with a clean connection between them. Whatever that may be called.
The supplier may well label it as a "serial cable" or whatever, but I'd ask for a "straight through cable with DB25 on each end" and just specify the genders.
Presumably you can do whatever you like at the Arduino end to ensure pin goes to pin.... If not you would need to get it made up to do that, or use a break-out box.
Yes, you want “straight through.” But the other problem is how many wires are actually present in the cable. A “serial db25” cable could have as few as three wires (Rx, tx, gnd), and somewhere at about 10 signals it will work with almost any serial device. The 25wire cables are heavier and more expensive.
You might be better off with 3x rj45 connectors and common Ethernet patch cables...
FYi, not that it matters anymore, but
the title of this post should have been:
"DB25 STRAIGHT-THROUGH (screaming again)
extension cable"
I would leave out the word " serial" and the
word "printer" .
You'll need to ohm the cable out to verify
all 25 wires go all the way through pin to pin.
I'm running chrome on android, I guess it displays this forum a little different.
And heh, well I guess that explains why on earth some people are using up to four common serial ports (Dsub 9p, RS-232, comport, whatever its official name is) for this project. I was looking to combine them into one thick cable to make it a little neater, but I suppose I better not unless I can find a 25 lead cable and solder the headers on myself to avoid funny business.
I've got plenty of RJ45, CAT5 and a crimper, so I could do it that way.
I need about 16 leads in total, so that works out to two RJ45.
@sayHovis : It could be my end, but it seems the picture is broken?
@JohnLincoln : It has to go through a few bends and turns, and be partially flexible (controlbox will be inside a moving drawer) so a flat ribbon cable would be a little cumbersome I think.
Barring the whole serial straight-through option, I do like the double RJ45 suggestion. Its easier to thread through than a clunky DB25 connector, and if I really want to, I can just shove it in a braided tube or one of those cable management spines. Certainly is a heap cheaper.
Oh that's an interesting tool. If someone nearby had one to borrow it would make quick work of it, though I wont be needing it enough to warrant the purchase myself. Thanks though.
Thanks though.