This circuit is a simple test of USB ports, it is a circuit very useful for anyone working in the field of computer science. To be "stuck" in the PC USB port or an information display Notebook USB device not recognized, just after the yellow LED flashes 3 times, and since it is not a normal USB device, the connection is not established, and micro displays an error message.
Tester for USB communication ports Circuit Diagram
List of Components
1 Red LED
1 Led Yellow
1 Green LED
3 per 1k 1/8W Resistors
1 USB connector male
Simple Test for USB communication ports
Indications of LEDs when lit:
Red - Polarization USB port was mounted inverted
Yellow - Wire USB port data were linked inverted
All Deleted - No power to the USB port
Green and yellow lights flashing 3 times when turned on - Normal Operation
Tester for USB communication ports Circuit Diagram
List of Components
1 Red LED
1 Led Yellow
1 Green LED
3 per 1k 1/8W Resistors
1 USB connector male
Simple Test for USB communication ports
Indications of LEDs when lit:
Red - Polarization USB port was mounted inverted
Yellow - Wire USB port data were linked inverted
All Deleted - No power to the USB port
Green and yellow lights flashing 3 times when turned on - Normal Operation
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