DIY - LAN Cable Tester - With or Without Arduino

There is nothing worse than running your drops only to realize that you have a fault in one of the cable runs. The best approach is to get it right in the first place by using a "LAN Cable Tester". Sometimes, cables can also tear because of poor material quality or bad installation or sometimes they get gnawed by animals.
In this project, I am going to make a LAN cable tester with just a few basic electronics components. The entire project, excluding the battery cost me just a bit over $3.
With this tester we can easily check RJ45 or RJ11 network cables for their continuity, sequence and if they have a short-circuit.
Links
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Blog: diyfactory007.b...

[@OriginalDeadGuy]

This is great. Demonstrates the basic functionality of a cable tester very well and answers my question on how they work :D

[@CrazyCoupleDIY]

Cheers thanks

[@bnepeople8740]

Nice one bro, keep it up I loved the way u hacked a chaser circuit and created a lan cable tester

[@fik_of_borg]

I built it with some improvements: 1- moved all LEDs, resistors and diodes from 4:40 in the video and that RJ45 to a separate "receiver", and then I can connect the 555+4017 "transmitter" unit at one office, walk to the switches cabinet in another room and identify the cable by connecting them one by one to the receiver to see which cable lights the LEDs. 2- added to the 555 another capacitor and a switch, so I can have a two-speed scan. Fast is for looking at a glance if all LEDs light indicating that there is no open circuit due to a broken cable or bad RJ45 crimping. Slow is to check for swapped / shortcircuited lines. 3- added a piezo speaker to the 555 output, so it emits a chirping sound and is less likely to be left on draining the battery. 4- added an 8 position SIP connector both to transmitter and receiver to ID+check the cable without connectors. It's a nuisance when one checks the cable and one or two signals are missing, and it's unknown which RJ45 is bad or it's the cable itself.

[@mattbireta]

This will not test for shorts. The wires are already shorted at the other end. If there is a short it would just return to ground potential through the shorted wire and diode. It won’t light the led because it would be reverse biased. This tester won’t test sequence either, you’re just lighting the diode on the wire you wish to test, not what wire it actually ends at. Congratulations, you made a 555 8 light sequencer.

[@kaischapen3552]

That was my initial thought also. The original idea works fine for broken connection, but is not good to test shorts or sequence. Still a nice starting point for as tester, though. And well prepared video. Thumbs up for that!

[@hobbit1766]

Very informative bro. I have been watching all your videos since morning Thanks for sharing them all

[@CrazyCoupleDIY]

Thanks mate

[@BNBLamai]

I always get cool ideas from ur channel...this is a great channel

[@haukauntrie]

Wow! I love that you provided a version without arduino! In Fact, this project looks fully fleshed out. Did you ever consider ordering some costum pcb's and selling theese testers on tindie? You could sell them for 7$ and make a good profit.

[@CrazyCoupleDIY]

Thanks for the appreciation Na, I havent ordered any custom PCBs yet, but I will definitely consider that as an option. Thanks. Stay tuned for more projects and have a look at my other tutorials if you want , cheers

[@JanDillmann]

I just completed a PCB layout inspired by your video, but modified for USB power (e.g. a power bank or a phone charger) and using SMD components. easyeda.com/derjan/lan-cable-tester

[@CrazyCoupleDIY]

This is amazing. I will put the link on my instructable and my blog. Thanks :)

[@ShailSonsTech]

Wow the best idea for lan-cable ever

[@CrazyCoupleDIY]

Thanks my little friend :)

[@ShailSonsTech]

Your welcome my big bro

[@hobbyelectronicsRU]

Does not detect short circuit and junction

[@JamesDeanRivera]

Very nice. Awesome tutorial

[@trishyajameen336]

loved this DIY

[@verma0111]

Very useful electronic device.thanks foe sharing

[@wickedfun911]

Loved this project, built my own and it works well. I have done the same as @fik_of_borg has done with a "remote" end. Is there any way to take this to the next level? I have a building with many unlabelled network ports, I would like to have the "remote" ends identifiable (remote 1, remote 2, remote 3, etc) so I can plug the remote ends in, and back at the switch identify what is what?

[@MountainRidgeMalamutes]

Nice tutorial, love the intro

[@CrazyCoupleDIY]

Thanks for watching 😄😄

[@stevenbrown8782]

Very good presentation. Thank you.

[@CrazyCoupleDIY]

Thanks ✌️👍

[@waqaswajid156]

Very informative Dear

[@umairalich287]

Good work dear

[@bestnless4649]

Very nice, keep it up

[@alexaanna5277]

Fantastic Dear

[@hpphpp1297]

Good once Dear

[@sanawajida528]

I always like your videos dear

[@KanchanDas]

Very much helpful.....

[@CrazyCoupleDIY]

Thanks :)

[@azrafatima641]

Very Nice Dear

[@misbahatir1004]

Very Nice Dear

[@varelaalfredopanolt.m.2617]

led is 3mm?

[@CrazyCoupleDIY]

Yes, that’s what I used but if you want u can use 5mm. But obviously then you may struggle a bit with the available space.

[@HemantRangdal]

great dude....

[@CrazyCoupleDIY]

Thanks a lot for watching :)

[@reshmabegum3677]

Awesome technic

[@sanawajid2870]

Good job Dear

[@majmuawazaif2445]

Nice Dear

[@0ffGridTechClub]

Awesome

[@CrazyCoupleDIY]

Cheers thanks

[@allenhiyas3979]

may i know the wattage of resistors? and the votage of capacitor? Resistors 220Ohms resistor 10K resistor 150K Capacitor 4.7 uF

[@CrazyCoupleDIY]

1/4 w for resistors The voltage rating is only the maximum voltage that a capacitor should b3 exposed to, not the voltage that the capacitor will charge up to. So anything is fine

[@LOSER-xu2ld]

Awesome

[@DilnuwanAmaraweera]

what's the drawing software ?

[@CrazyCoupleDIY]

Fritzing from: fritzing.org Courtesy: diy-projects4u.blogspot.com/

[@GautamElectronics1807]

Why to use another ic while we can use 8 pin of arduino nano.

[@CrazyCoupleDIY]

What about without nano?

[@gokulgochi]

If you are using Arduino then no need of 4017 too I suppose as you can use other digital pins to switch led if led current can be supplied by uc.

[@CrazyCoupleDIY]

Well yes and no.

[@CrazyCoupleDIY]

Well mate you will run out of gpio pins that’s why no And I hate the lazy way of using arduino for everything when I have the proper knowledge of how the components work that’s why no.

[@gokulgochi]

@@CrazyCoupleDIY you won't run out of pins as nano as 13 digital io and only 9 output is required for you.

[@CrazyCoupleDIY]

Well I guess u are not someone who has more experience but u sound more like a fucking winger who has nothing else to do in life other than poking their fingers in someones asses and licking the shit out of it. Ur experience is useless as I dont see u smart enough, u should better go back to school and learn some fundamentals of electronics and not how to use an Arduino

[@adelaidepeople4810]

I agree with you @crazy couple and will rather use a 4017IC and not use out all the GPIO pins of an Arduino and then use a port replicator or a MUX for other sensors. I guess this @Евгений Поправка is here to create a fuss With some idiotic videos on his profile he is trying to be the big daddy. I will keep such idiots aside and keep moving on. People like this only gives you publicity - thats it

[@jamalalhaj2022]

Great topicVery special

[@CrazyCoupleDIY]

Thanks mate

[@likini6179]

Hi is there anyone who can help me get 16 core cable testing?

[@gurudattag8777]

Bro make a device that use for long distance cable

[@CrazyCoupleDIY]

This setup is not idle for long length cable. However, by adding few transistors to amplify low current you can make a long range tester.

[@rimshaali7277]

Thanks for sharing Dear

[@CwC_Academy]

The Arduino code for this project please

[@CrazyCoupleDIY]

Hi mate This is not an arduino project This is based on 555 timer IC

[@senthramiljohnlandingin3728]

what is the code for this mate?

[@CrazyCoupleDIY]

You can use the blink code As you just need to send a high followed by a low every lets say 100ms

[@senthramiljohnlandingin3728]

void setup() { pinMode(LED_BUILTIN, OUTPUT); } void loop() { digitalWrite(LED_BUILTIN, HIGH); delay(100); digitalWrite(LED_BUILTIN, LOW); delay(100); } //is this the code your talking about mate?

[@CrazyCoupleDIY]

@@senthramiljohnlandingin3728 yes, increase the delay a bit more based on how fast u want the LEDs to toggle

[@senthramiljohnlandingin3728]

@@CrazyCoupleDIY thankyou so much mate i appreciate your help

[@CrazyCoupleDIY]

@@senthramiljohnlandingin3728 You are welcome Subscribe for more amazing tutorials and projects

[@paulsig8380]

if you use an arduino you dont need a shift register

[@CrazyCoupleDIY]

The point is to use only one pin to generate a pulse.

[@DreamSoccer-mt2ls]

can i see the pcb's bottom circuit

[@CrazyCoupleDIY]

It’s in the schematic

[@DreamSoccer-mt2ls]

Crazy Couple Thank me for understanding

[@DreamSoccer-mt2ls]

as on the 2 cable leads cross each other led still work normally, righ

[@CrazyCoupleDIY]

👍

[@zobizobi4374]

Keep it up Dear

[@aashufaizy6555]

nice

[@mohidbari3746]

Good Dear

[@didiedent5742]

i cant find the code for arduino, help me

[@CrazyCoupleDIY]

You can use the normal blink code mate You just need to send like a pulse every let’s say 10 seconds to shift a bit.

[@infoinfo6399]

👍👍👍 Dear

[@aashufaizy6555]

crazy couple i m your frnd....you know who i m 😆😆

[@CrazyCoupleDIY]

Nice to hear, and I am not sure who u are mate

[@aashufaizy6555]

ok

[@adityak3578]

Indian?

[@CrazyCoupleDIY]

Yes I am

[@aashufaizy6555]

sahil 😊

[@CrazyCoupleDIY]

Who sahil?

[@aashufaizy6555]

+Crazy Couple nothing 😊