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RoadTests & Reviews

27 Posts authored by: colporteur
After completing the power testing and while waiting for some USB-C adapter changers to facilitate some further testing, let's follow-up on LG comment in Insight into lan78xx driver support for Pi  about interface throughput.   Since I don't have a network analyzer to checks throughput, I did an internet search and came up with a software tool https://iperf.fr/  to make some measurements. From their website, iPerf3 is a tool for active measurements of the maximum achievable bandw ...
  The circuit diagram is the equipment setup used to perform the power measurement readings on the Pi4B. The Microchip PoE to USB-C provides replaces the traditional wall wart Pi power supply. To test the power performance of the Microchip PoE, the Pi4B will be subjected to an increasing load thereby demanding more power from the source. The voltage output on pin 1 & 2 (5v & 3V) will be monitored with a volt meter to record any changes.   Two load tests will be used. One is a ...
  A credit thank you to GL lui_gough for providing the configuration details required to get the lower circuit working.   The vendor alluded to the requirement for a lan7800 driver. When the interface didn't work initially, I thought  the driver wasn't supported in the Raspberry Pi Operating System (O/S). Microchip PoE to USB-C® Power and Data Adapter RoadTest Review Data   After much testing, I became convinced a missing driver wasn't the issue and the interface ...
I am unable to establish a data path from a Raspberry Pi via the Microchip PoE USB-C adapter.   Failure to establish some data connection is a disappointment but not a surprise. Data via the USB-C on the Pi was an unknown entering into this RoadTest. This post will provide the setup and configuration details that were used in the testing. The plan for the review process is to make another post seeking E14 Community assistance in finding a solution. As was mentioned in the introduction, the ...
Will the Microchip PoE power a Raspberry Pi 4B?   The initial test involved establishing a host hardware and software configuration that works with traditional wall wart power. Then using the same host power it from the Microchip PoE.   As explained in the introduction to this RoadTest, only Raspberry Pi hardware will be used as host devices.  The initial test used a Pi4B (my apologies I may have used Pi4B+ identifier in earlier posts) hardware that was provided as part of the R ...
I recall a forum post discussing unboxing content being included in a RoadTest Review. Some members supported the idea others not so much. I like including some unboxing content for a review were it provides value.     I omitted photos of opening the shipping container and displaying all the packaging material. Not much value there. What I removed from the manufactures box I positioned under a desk lap for the photo op. I was all out of limelight to display the star performer so I h ...
  I received noticed from UPS that there is a package on route to me. I will assume it is the equipment for this RoadTest. I have no other items I am waiting to receive. I didn't click the link to confirm. I'm hoping it not just a UPS related phishing attempt. Oh well, let's post some theory for this RoadTest in the mean time.   What is Power over Ethernet (PoE) as it relates to this device. With the Microchip PoE, a USB-C powered device can get power over the same cable that carries ...
I just received a request to confirm if I will accept Element 14's offer to complete the Microchip PoE to USB-C® Power and Data Adapter RoadTest review. I guess that makes it official. While I wait for product shipping I figured I would attempt to generate some interest with a blog post.   For my application, I leveraged the understanding that I have RoadTested a PoE device in the past Raspberry Pi4B (4GB) plus POE Hat - Review  . I thought the knowledge gained through that RoadT ...
Before tackling the actual review document for the PicoScope 6424E Oscilloscope + Accessories I was encourage by other blog posts about the 6424E to try another test. The motivation for this additional testing was after reviewing the the blog post Picoscope 6424E RoadTest - Testing a power supply  done by michaelkellett . I recalled a E14 series  Workbench Wednesday 25: Measuring a MOSFET’s Miller Plateau  , a look at the switching of a FET. I was fascinated by the knowledge ...
This is a blog post in support of thePicoScope 6424E Oscilloscope + Accessories . It is the eight and final blog post in a series exploring the equipment in order to generate the content for the final RoadTest review.   The operating system (O/S) I primarily use is Linux. Being retired, the requirement for me to work in the Microsoft Windows Operating system is greatly diminished. I rarely open the O/S. I was concerned when I applied for the RoadTest Review regarding testing in MS Windows. ...
This is a blog post in support of the RoadTest PicoScope 6424E Oscilloscope + Accessories . It is the seventh blog post in a series exploring the equipment in order to generate the content for the final RoadTest review.   When fitted with optional 8-channel TA369 MSO (Mixed-signal oscilloscope) pods, the PicoScope 6000E Series adds up to 16 high-performance digital channels to up to eight analog channels, enabling you to accurately time-correlate analog and digital channels. Digital channe ...
This is a blog post in support of the RoadTest PicoScope 6424E Oscilloscope + Accessories . It is the sixth blog post in a series exploring the equipment in order to generate the content for the final RoadTest review.   A less than ideal showing in the PicoScope 6424E Oscilloscope + Accessories: Application Objective motivated me to investigate some other capabilities of the PicoScope. Servo motor operation on the Pi has be lack lustre in comparison to that of a microcontroller like an Ard ...
This is a blog post in support of the RoadTest PicoScope 6424E Oscilloscope + Accessories . It is the fifth blog post in a series exploring the equipment in order to generate the content for the final RoadTest review.   My application pitch was to review the equipment while analyzing servo motor operation. I did a tutorial for a magazine publication back in June 2019, describing the operation of servo motors on a Raspberry Pi. The python scripts doesn’t work on a Pi today. What has c ...
This is a blog post in support of the RoadTest PicoScope 6424E Oscilloscope + Accessories . It is the forth blog post in a series exploring the equipment in order to generate the content for the final RoadTest review.   This blog post will provide: the classic unboxing descriptions with images a look at quick start guide a setup tour initial impressions. what next   After some shipping delays the equipment arrived. It sat on the shelf for a few days until I freed up some time in ...
The Pico Oscilloscope RoadTest Review is currently in a holding pattern due to a shipping error. I figured I would fill the wait time by sharing the methodology or my approach for the RoadTest. I value the input from members. On past RoadTest their commentary has improved my review by providing knowledge I didn't have, thereby enabling me to correct details I stated in error.   My application offered to review the equipment while analyzing servo motor operation. Recently, I discovered a tu ...

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