The latest version can be found here:
USB has become the core of many projects. In my experience I've found it to be troublesome to test USB voltage levels and current usage using a breadboard. They usually consist of holding wires attached to the DMM’s test leads, making it difficult to get solid readings. The USB Tester will make it much easier to monitor any USB project’s power source.
As part of the USB spec, you are limited to 500ma, so you want to monitor how close you are. Most people use USB hubs, both powered and unpowered, and with many devices connected, you can end up with less than 5V which can cause havoc on you projects. The USB Tester will make it a snap to monitor voltage levels and current usage without having to re-wire your breadboard. Just connect to your oscilloscope or DMM test leads, and you’re good to go! The USB Tester has both banana clip sized drills and standard 0.1” headers. When you are not testing current you can add a jumper for normal operation. The USB D+/D- pins are also broken out so you can monitor those on an oscilloscope, or for USB sniffing.
The USB Tester PCB size uses Dangerous prototypes Sick of Beige standard DP5031 so that it can can be used as a base. You can find an arcylic base here https://www.tindie.com/products/FriedCircuits/acrylic-base-for-usb-tester/
The PCB is made in the U.S. using OSHPark’s PCB service.
Here is a list of features:
•Monitor voltage levels •Monitor current usage •Monitor data lines via an oscilloscope •Banana clip testing points •Jumper connection to bridge current connection when not testing/normal operation •Dangerous Prototype’s Sick of Beige standard PCB size •Headers for future expansion via backpacks •Uses SparkFun's 0.1" locking header footprint
•PCB with both USB A and mini connectors •14 unsoldered 0.1” pin headers •1 jumper
Note: a USB mini cable is not included You can get one here: 3ft White Mini USB Cable
You can use leads like these from SparkFun to connect your DMM to the USB Tester: http://www.sparkfun.com/products/507
You can find the OLED Backpack here: https://www.tindie.com/shops/FriedCircuits/usb-tester-oled-backpack-with-display/
Or you can get a bundle: https://www.tindie.com/products/FriedCircuits/usb-tester-oled-backpack-bundle/
You can find the documentation and support over at: http://friedcircuits.us/docs/usb-tester.
Thanks for looking! Friedcircuits appreciates your business and we hope to provide you with more awesome products, some of which are in the works.
Please feel free to email me with questions or comments about the project. You can also find me at www.mobilewill.us, where I blog about projects, products & more!
Follow us on twitter @friedcircuits.
Jan. 22, 2014, 4:35 p.m.
Do you have a schematic / trace diagram? I have a particular application in mind, but I'm not sure if this board will suffice.
Jan. 22, 2014, 5:27 p.m.
Yes, its one Github. https://github.com/FriedCircuits/FC-USB-Tester/tree/master/USB_Tester-v1
What did you have in mind?
Oct. 13, 2013, 1:02 a.m.
What current levels is this compatible with? some phones and tablets are rated to charge at up to 2.1 amps, and some battery packs up to 3+ amps
Oct. 13, 2013, 8:42 p.m.
The traces allow for around 3A but the USB connecters aren't. But I haven't had any problem measuring over 1A. All the USB connecters I have found are ~1A.
The tester board is great - very helpful when you go to measure power usage. The labels on the PCB were a little confusing, and a quick one-pager on how to actually use the board would have been helpful, but I'm very happy with them.
Feb. 12, 2013
Feb. 12, 2013