The drawing of USB Port Tester Board

Today I sketch an official drawing for the USB Port Tester Board. This circuit basically tie the input to input high (1) when there is not input present. Connecting a switch to GND would trigger the INPUT port to low (0). In short, so (1) is OFF and (0) is ON then. As indicator, when the input is on then the LED will light on. This is the circuit diagram for the design.

Once the circuit diagram is completed, then I design the parts/components layout to facilitate the PCB fabrication later on. This is the TOP view (component side) of the PCB. Here is the board layout design. As for the parts required to built the circuit, they are just some common parts only. To make board nicer actually its better to use the array type resistors. But then since it is not available in SS2 that day so I just use the discrete type which occupy more space and more wiring. However, the result would be the same then. The 1kohm is R1, 100kohm is R2 and the R3 is 100 ohm. As for LED I will use two different colors, GREEN and YELLOW to differentiate the ports. The usage of IC socket just simply to make the IC replacement easy in case of IC faulty.

To get the full version of the design click here