Conclusion of my first look at the black version of the YZXstudio USB power monitor.
http://www.ebay.com/itm/USB-2-0-Power-Monitor-Black-YZXstudio-18-Bit-Voltage-Current-Meter-OLED-/201397906943
http://www.ebay.com/itm/Bluetooth-Module-UART-Serial-Interface-SPP-CA-works-with-YZXstudio-USB-Monitors-/201414967094
http://www.ebay.com/itm/USB-2-0-Power-Monitor-Black-YZXstudio-18-Bit-Voltage-Current-Meter-OLED-/201397906943
http://www.ebay.com/itm/Bluetooth-Module-UART-Serial-Interface-SPP-CA-works-with-YZXstudio-USB-Monitors-/201414967094
The reason why black is such a popular color for plastics is simple. When recycling plastics, and you mix all sorts of different colors together, black is what you end up with. This is why so many car batteries are black, as that industry is very heavily into recycling…
you should take an plunge on the most advamced fellow YZXstudio1270 or the newer 1271/1272/1273..there has happen a lot since..btw are you familiar with any android app or windows software there can take bluetooth serielvalues and map them on the fly– got no problem in getting the seriel or the hex values out from the usb meter on bluetooth, but would love if there was an software there could graph them out on the fly.
Julian says the tech inside is massively improved but it is USB2. Is USB2 really a big advantage?
I guess its like the one i got, it also from ZXYstudio, but with lcd colorscreen and the bluettooth raw stream can be adjusted from 0.36sek to the minutes, and makes it easy to just copy paste the dataloggin-numbers to make an graph.
so quite usefull to see the voltage & current comsumption over time in an visual graph and fx how an powerbank performs over the battery-range.
I know numerous multimeters got the bluetooth datalogging feature, and take this raw value-stream from wireless bluetotth and put it into an graph on the fly..anybody familiar with "apps" to any system that can graphf these values on the fly… in praksis it should be pretty basic to write & compose, so I would reckon it exist..? but sofare cant find any on android, or osx, or win10/7 / windows phone app that can plot these values on the fly..??
btw' Have you tested the ZXYstudio powerbank gen7 or 8.. pretty wicked the manage of power there exist to manage 12A !! (gen8)
Anyone have a schematic or firmware source code for these they are willing to share? I'm trying to understand a why some devices are able to draw more power when one of the monitors is inline. I'm using a yellow model. I suspect a low resistance is temporarily across D- and D+ when power is first applied and some devices think the monitor is a charger.
YZXstudio just released a upgrade to the black on their taobao update page, to version 2.7. It now has the 2 graphs on the same screen like the green meter, and also has the same data line graph.
the green monitor launched
I will be using the newer black 2.0 yzxstudio out in the field or out doors and the protection of this version from the elements makes it a good trade off for me, 🙂
How can that little board handle 100W of power? 😮
The sampling speed is VERY IMPORTANT unlike what you state in the video. To calculate mAh/mWh rating you need to measure area under the current/power curve. If you have just 3 samples per second, this curve is going to miss most current bursts. It is going to be a very poor measuring device.
The only hope is if you are doing some kind of analog averaging using capacitors and/or inductors before measuring with the ADC.
Hi Julian… thanks for the videos.
3.5v to 24v / 3amps
hmm thinking would this be ok to put in line with a solar panels wiring to display volts and amps.
Also could you do a video on its output to bluetooth or wifi "data logging" please. that would be cool.
If it has I2C, then you could connect it to an arduino and that can send data to big display or internet site?
That is pretty nice
Unfortunately increasing the range means lowering the resolution.