Richard Testardi
UNITED STATES OF AMERICA • + Follow
Nov 19,2023
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  • Thank you for your way wonderful open hardware project! This is a really nice resource, not only for people of all ages to learn from, but also as a very nice, very inexpensive portable scope.

    Richard Testardi 2024-03-11 20:38:21Reply

    You're totally welcome! Thanks for the kind words! Let's hope we can engage some kids and get them excited about designing and building stuff! :-)

    Reply
  • Awesome project! The fact that only a web browser is needed blew my mind, never heard about WebUSB / WebSerial before. Also I'm impressed about the user manual with all the important specifications documented on the first page, like we know from professional products. Hope this tool is successfully used by schools for teaching. Like already mentioned, using open-source tooling would make it perfect :-)

    Richard Testardi 2024-02-27 10:09:19Reply

    Thanks -- I started dreaming about this the day I learned about WebUSB and Web Serial -- I just hate having to install apps... BTW, I did get an article in Circuit Cellar which is basically trying to draw attention to both these technologies: https://rtestardi.github.io/usbte/gadget.pdf

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  • Very nice project! Very complete, pretty well described, and indeed an excellent teching/learning project. And big plus, everything is published in the open. Only thing missing to be perfect, be designed with open-source software ;)

    Richard Testardi 2024-02-20 20:53:35Reply

    Thanks! I use Microchip MPLAB X (for firmware) and Novarm DipTrace (for hardware), both of which are not open source, but they are free. (DipTrace is free for up to 300 pins, and Flea-Scope uses just 216 of 300.) For an MCU programmer, I use Microchip Direct "Snap" -- for 40 USD.

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  • Hi exciting project, just a question I do not understand how to connect your device to a mobile phone thank you

    Richard Testardi 2023-12-11 10:33:42Reply

    You need a mobile phone that supports USB -- typically android... Then you will need cables to connect from the phone (which typically has micro-USB or USB-C connector) to the Flea-Scope, which has micro-USB. In the third picture above, I use a micro-USB to USB A female adapter to connect to the phone, and then use a USB-A male to micro-USB cable to connect to the Flea-Scope. When you plug the Flea-Scope into the phone, you should see the blue LED blink_ -- telling you it is getting power from the phone. Then just launch Chrome on the phone and you should be able to open the webpage and connect to the Flea-Scope.

    Richard Testardi 2023-12-11 10:36:33Reply

    PS some Samsung phones do not work because they allow a serial driver to bind to the CDC/ACM port exposed by the Flea-Scope, but they do not support "Web Serial" in javascript_/Chrome (only WebUSB). This is unfortunate -- they should either not have a serial driver that automatically claims USB devices, or they should support "Web Serial" so that javascript_ applications can talk to the USB device.

    Engineer 2023-12-11 17:15:23Reply

    thank you so much

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  • This is what I have always dreamed of!

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