Introduction: USB Tester


This simple device allows you to check the correct working of the USB ports of any computer, using a green led and message from your operative system.
It will allow you to test the proper assembly of any port without risking any expensive device.
If you normally work fixing computers this is a must in your tool kit.

Ps: I'm from Argentina so let me know any grammar mistake


Step 1: The Circuit


The circuit is very simple using only some discrete components.
The operation is simple, you connect it to the USB port, if it's okay, the green LED is lit in all its intensity and you will have a message from your operative system telling you than a USB device has been detected. If the polarity is reversed the red LED is lit in all its intensity. Any other combination causes lit one of the two LED but very dim.

You will need:
The PCB (see step 2)
The USB connector (see step 3)
Two 22K resistors
One 1k resistor
One 100 ohm resistor
One 1.5 k resistor
One 3v3 zener diode
One 1N4148 diode
Two leds (green and red)

The diagram was extracted from this forum (in Spanish): http://www.ucontrol.com.ar/forosmf/proyectos-en-general/probador-usb/

Step 2: The Board


The PCB is very small and simple.
I made it using the method of ironing.
PDF file annexed contains the design ready for printing.


Step 3: The Connector


This project seeks to be economical so you're not going to buy a connector. We will recycle a cable that does not work.
First we remove the plastic guard with a knife.
Then remove the remains of cable and solder it new terminals.
Finally I soldered two terminals to the metallic body to keep it firmly attached to the PCB:

Step 4: Soldering Components


The components are easy to weld.
Try not to overheat the diodes and not allow shorts in the PCB.
Use the second image as an assembly guide.

Comments

author
gmrad (author)2016-10-26

Clever hack!

author
Aaaecm (author)2016-07-29

Great project! Very useful. This is just what I needed. Thanks!

author
ortegacomputacion (author)2015-07-27

Hey Bruno, thanks for sharing, this is exactly what I was looking for. I'm planning to use a bicolor led, the one which turns green or red depending which way the current flows. anyways, I'm from argentina too, and I have a small grammar correction for you, "Try not to overheat the diodes and not allow shorts in the PCB." should say : "Try to not overheat the diodes and don't (or do not) allow any shorts in the PCB" brunoip, you are legendary , here in Argentina. also se dice easy to solder, weld is for big uniones.

author
TheGimpAddict (author)2010-06-26

Did you design the pcb by yourself?

author
brunoip (author)TheGimpAddict2010-06-26

Yes, I did.
Using PCB Wizard.

author
AtLarge (author)brunoip2015-07-20

Thank you Brunoip. I made mine on a breadboard. Seems to work work fine although I only had 15k resistors on hand not the 22k you had specified. Need you to design one for testing a USB 3.0 port now. :-)

author
MildredGreen (author)2015-06-09

very good article for IT students like me :) thnx

author
azimovismayil (author)2014-11-30

very good.I could make it at 4th time :D

author
Machintosh1984 (author)2013-10-23

Can anyone please tell me the working principle of this USB tester

author
cholerah21 (author)2013-05-13

sir laptop got like this http://www.usbman.com/Guides/Belkin_F3U001.jpg? hhh

author
m1s73r (author)2011-11-16

When does the red LED light up?

author
panic mode (author)m1s73r2013-04-24

Q: "When does the red LED light up?"

A: when USB polarity is reversed. this little mistake can easily be done on auxiliary or remote ports on desktops. those are ones that connect to motherboard through cable, for example:
http://www.usbman.com/Guides/Belkin_F3U001.jpg

plugging in camera or phone etc is an expensive way to test for this.

author
brunoip (author)panic mode2013-04-24

Pánico mode is right, Thanks for answering him.

author
bobbock (author)2010-11-01

What wattage resistors are you using, or does it make a difference?

I'm new to building electronic devices, and thought this would be a good one to try. When I went to get the supplies from my local store the first question they asked was what wattage. I bought 1/4 watt ressistors assuming that the voltage of a usb port is around 3.3 volts.

Thank you for the project and any help you can give.

author
ionic (author)bobbock2011-11-08

Bob
I believe they are 1/8W as they are the same size as a 1N4148 diode.

author
Blip-Blip-Duino (author)bobbock2011-07-12

Wattage(sounds like cabbage, haha) doesn't really make a difference. In this case, seeing as you're using an USB port, with 1/8 you're more than fine. BTW USB uses 5 volts DC, usually @ 200-450 mAh.

author
os_sanches (author)2011-08-07

kkkk, muito bom.

author
jupiter2 (author)2011-07-15

good job!

author
beaver84 (author)2011-05-06

cool! :D

author
inhaos (author)2011-05-05

your schematic is cool
here is a perfect solution for you
http://www.inhaos.com/product_info.php?products_id=29

cheers!

author
mased007 (author)2011-03-17

Hello. How to ironing method do? please

author
MoritzB (author)2011-02-12

Does it only check the voltage at the red and black connections, or does it also check the data lines?

author
dwyatt1045 (author)2011-01-26

I was wondering what the wattage is for the resistor

author
brunoip (author)dwyatt10452011-01-26

The smallest you can get.
1/4 or 1/8 watts shloud be fine.
There is no problem if you want to use a big one.
Regards, Bruno.

author
kenobr100 (author)2010-12-01

how much did this cost to build ?

author
brunoip (author)kenobr1002011-01-26

I think it would be less than 2 dollars.

author
xtagz (author)2010-08-20

Sir.. Can u send me some other links for the PCB design..?? i cant DL the pdf file because im not a pro members... thanks..

author
Minifig666 (author)xtagz2010-11-17

You don't have to be a pro to get that PDF, did you try clicking it?

author
manish_1october (author)xtagz2010-09-29

manish_1october@yahoo.co.in


i need a circuit diagram.


can u help me.....

author
Taran606 (author)2010-10-27

i dont have any 3v3 zener diodes any other parts i can use

author
Taran606 (author)2010-08-19

Insted of using 5 resistors can't u use one 100 ohm resistor and one 46.5k resistor

author
brunoip (author)Taran6062010-08-19

no

author
Taran606 (author)brunoip2010-08-19

Why explain and can u make a smaller compact version plz

author
Taran606 (author)brunoip2010-08-19

Why explain abd can u make a smaller version that's more compact

author
Taran606 (author)2010-08-18

In the 5th pic or the last one what are the extra leeds on the side for and are they inportant

author
brunoip (author)Taran6062010-08-19

Read the text:
"...to keep it firmly attached to the PCB"

regards, Bruno

author
Taran606 (author)brunoip2010-08-19

Thanks

author
Leuh4n (author)2010-08-16

Fa, que trabajo posta :O

author
vhhp (author)2010-08-10

Brunoip, Good work. Liked your product and also your sensible replies. ..regards..

author
MASKELF (author)2010-07-10

excellent creation Bruno after creating it worked perfectly and as expected, is a great tool because I lost a USB memory port through a poorly connected, thanks! add a photo of mine

DSC00260.JPGDSC00256.JPG
author
ozzymon (author)2010-07-07

buenisima la idea, increible tu ingenio!!! segui asi y ojala que tenfçgas suerte con tu usb tester!!

author
brunoip (author)2010-07-07

An user sent me a photo of his prototype.
It worked perfectly.
Here it is:

dsc00240z.jpg
author
papajay_23 (author)2010-07-07

what is the introduction of this usb tester??can i use thiis in thesis proposal?

author
vyncynt (author)2010-07-06

I have been wanting to have one since I got my tech job. this is very neat, thanks brunoip.

author
fpm2000 (author)2010-07-02

Nice instructable! Since I don´t have the skills to build one, I purchased a similar device from www.USBcheck.net.

author
zilcho (author)2010-06-22

I'm a complete noob on electronic stuffs so could you tell me what kind of iron on thing you used to print the circuit board.

author
brunoip (author)zilcho2010-06-23

You can use any type of iron.
Instructables has several posts explaining how to do it.
Regards, Bruno

author
TSC (author)2010-06-22

Cool!!!!

author
The nerdling (author)2010-06-20

hello heres a tip: use a rule for your lines but s is syill good

author
brunoip (author)The nerdling2010-06-21

I prefer it that way. Thanks [i]A la criolla[/i] Regards, Bruno

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