Provides a inline breakout to access USB power and data pins.

(http://friedcircuits.us/docs/wp-content/uploads/2012/12/USBTesterFront_labled.jpg)

USB TESTER SECTIONS

1. Breakout of all connections, used for males headers to backpack2. Current Test points

Provides banana size holes for Digital Multi-Meter (DMM) test leads.The right one is connected to USB Mini and the left one is USB A.Current would past from right to DMM to left one.

3. Current JumperRemove before testing current with DMM.When jumper is installed allows to bypass current testing

4. Voltage Test PointsBanana size holes for DMM or 0.1 header for test leadsRight is VCC.Left is GND.

5. Breakout of all connections, used for male headers to backpack

JP3 and JP4 are connections for backpacks and arelabeledon the rear of the PCB.

USB A port on the left connects to your device. USB B mini connects to your computer orpower source.

(http://www.sparkfun.com/products/507)

You can use leads like these from SparkFun toconnectyour DMM to the USBTester:http://www.sparkfun.com/products/507 (http://www.sparkfun.com/products/507)

Note: Becarefulwhen using test leads as you can easily short out the power connections.Your computers USB port should protect itself but dont rely on it.

How to:This is a general guide on how to use the USB Tester to monitor current and voltage using aDigital Multi-Meter. Your meter may operate differently in which case you should refer tothe operation manual.

Measuring Current:

(http://friedcircuits.us/docs/wp-content/uploads/2012/12/USB_Tester_Curr_Setup.jpg)

USB TESTER CURRENT SETUP

(http://friedcircuits.us/docs/wp-content/uploads/2012/12/USB_Tester_Curr_Setup_DMM.jpg)

CONNECTIONS TO DMM FOR CURRENT

(http://friedcircuits.us/docs/wp-content/uploads/2012/12/USB_Tester_Curr_Setup_DMM_Full.jpg)

DMM MEASURING CURRENT OF AN XBEE SERIES 1

Your DMM might be auto ranging, if not make sure you select the proper setting for thecurrent you are measuring. Otherwise you can blow a fuse. This DMM has two fuses one forthe 4mA/400mA range and another for the 20A range. For 20A there is aseparateport.

Since USB is 500mA but other devices while charging can be more you should use thehigher setting.

Measuring Voltage:

(http://friedcircuits.us/docs/wp-content/uploads/2012/12/USB_Tester_Volt_Setup.jpg)

USB TESTER SETUP FOR VOLTAGE

(http://friedcircuits.us/docs/wp-content/uploads/2012/12/USB_Tester_Volt_Setup_DMM.jpg)

DMM SETUP FOR VOLTAGE MEASURING

(http://friedcircuits.us/docs/wp-content/uploads/2012/12/USB_Tester_Volt_Setup_DMM_Full.jpg)

DMM MEASURING VOLTAGE TO AN XBEE

Things to look out for:

Be careful that the leads on the rear dont touch. One way to prevent this is to insert onelead from theoppositeside instead of both on the same side of the PCB. If you have theheaders and/or jumper soldered on, it will keep the leads from going too far in so theycannot touch on the back side.

(http://friedcircuits.us/docs/wp-content/uploads/2012/12/USB_Tester_Volt_Setup_Rear.jpg)

USB TESTER, REAR SIDE WHILE MEASURING VOLTAGE

Versions:

1.0: Initial

1.1: Ground plane both sides

1.2: Different USB A footprint for better alignment during assembly

1.3: Updated traces for D-\D+ for good measure, and increased thickness of VCC

OtherGuides

USBTesterandPhoneCharging(http://friedcircuits.us/docs/usbtesterandphonecharging/)

LEDMatrixMaster(http://friedcircuits.us/docs/ledmatrix/ledmatrixmaster/)

USBTesterOLED(http://friedcircuits.us/docs/usbtesteroledbackpack/)

USBTester2.0(http://friedcircuits.us/docs/usbtester20/)