I did read your form over the multi pin selector cable tester. I want to build it at the same way you’re diagram show, bus can you specify the parts that you’re using in de diagram, I can’t read Al of the parts I’ve needed to build this tester
Since there are a lot more than a single form posting a link would help us get the one you are referring to. Also what resources do you have available and how skilled are you in electronics. Have you done anything like this before. Was it a diagram or schematic, if a schematic it should give you enough information to start building it as far as parts etc. It apparently has some electronics and a microprocessor, are you making your own PCB?
You probably need to provide more information…
I checked those @needlegate posts, and there is a complete cable tester defined with good input from @johnwasser .
The diagrams aren’t perfect, but they’re readable if you know what you’re looking for.
To do more, you’ll need to explain a lot more about what you have, and what you want to achieve.
We’ll certainly help you find your feet.
@lastchancename
The form link is:
The specific question is, what are the X1 and X2?
Is this a kind of d-sub connector or something else? And I think he’s using a arduino mega 2560 for this build
I wouldn't build it exactly the same today, if I were to rebuild it. I am thinking about making a new one using shift register instead. But as long as this one works so good I'm waiting.
There are no special parts.
Arduino mega,
A regular encoder knob,
Use a i2c lcd 16x2 display instead,
A button,
Diodes and resistors.
You could use diodes on every output. I have been experienced one output pulled high beeing connected through a bad cable to an output pulled low.
More important is to chose good 16-pole connectors. If you wanna check many types of cables, you want good, easy to use and perhaps cheap types.
I can take a couple of pictures when I get back to work on Tuesday
X1 and x2 is just connectors, yes. And it's not needed if you don't want to be able to disconnect them.
Iam using 2 different programs. One to just check straight cables and display it on the lcd. Another program shows the result on serial bus instead. And shows more accurate. For example if output pin 1 is connected to input pin 2,3 and 4
Ahh ok, it would be cool if you want to take some pictures!
I’ll will use it for 2-16 pole event connectors, so the only importance is that’s pin 1 is connected to pin 1 on the other and and so on.
What would be the benefit of using a shift register?
Good morning and sorry for late reply.
bit shift registrers might not give you much other than that you could have lots of inputs/outputs using just a few ios on the arduino.
The reason i chosed the Mega is because it has lots of ios, But if I were to redo it i would probably make pcbs and SMD components and a arduino Nano or something.
My tester is far from perfect, and one thing I added after that is not in the schematic is diodes on every output. Since I've had headaches from one output pulled high being grounded in another output pulled low from a faulty cable..
This is the adaptor connector, with 16 inputs and 16 outputs, I have 3D printed the white cover that covers the pcb with the 2 green connectors, this could be done better, this is really what take all the action when I change adaptor, I had to fix bad solderings a couple of times here.
This is how it looks
the first row indicates the outputs, the second row shows what is read on the inputs, so the red LED indicating error seems correct since nothing is registered on the input. I put some time when doing adaptors to make them as logic as possible, that way I can fast understand what line in the cable is what input, finding the fault fast.
This is an example of all different adaptors i use. I have to make an adapter for each unique cable. So for just testing just one cable I dont win anything, because it takes time to make the adaptor and also because I could might as well make an error on the adaptor.
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