USB Port Tester Making
Standard problem when visiting customer place for computer troubleshooting in laptop & desktop when we connect the pen drive some time it works some time it gives errors some time; USB mouse also some time detects some time not. searching on net I found this circuit diagram for reference. So for simplifying process I made this USB Port tester. I took one broken USB Male connector, 2-nos. 1KΩ Resistors & 5mm LED in Blue /Green/RED color, one each.
Now time to process the soldering ……………
Ready after solder. Did you say one LED is Missing??
As per the circuit diagram there are 3 different colors of LED is used.
- GREEN for Power OK.
- RED is for Error i.e. +5v & Ground is reversed.
- Blue – is Data indicator (When you plug the tester you get message on the screen of the computer “USB Device not recognized” & Blue LED Blinks, it indicates data signal is also working.
When I opened my LED Box I found some Bi directional LED (Green & RED color). Hence instead of using two LED (Red & Green) for power line testing I used only one Bi directional LED (Green & RED color), which indicates both the direction of the power. Now is the time to test.
On connecting to the USB port Green LED lights up showing power is OK
& Blue LED Blinks with message on computer screen.
By the way this project is just for R&D & not having proper housing for this USB dongle. Hence kept it on hold till find the solution.
This article was prepared for you by Yogesh Panchal who works as a Computer Hardware Engineer in Mumbai India.
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Note: You can check his previous repair articles on Battery Eliminator 1.5V To 12V No Power