Member #394180

Member Since: December 31, 2012

Country: United States

  • That clean water AI project does a good job with the AI, but will fail miserably on the microscopy/microbiology side. For one thing, yeast is way bigger than pathogenic bacteria. The latter require magnifications in excess of 1000x for properly seeing their shapes, which in turn requires oil immersion lenses and specialized methods of preparing the slides.

    Then there’s the problem of concentration. A sample of water that can make you sick is not a teeming mass of bacteria. It’s lots of clean water with some bacteria in it. When you take a random sample, then sample that to make a slide, chances are that you’re going to see mostly clear water. That’s why typically you take the sample and grow it in a petri dish until there’s enough bacteria to test.

    Finally, a water treatment facility doesn’t actually have to identify the pathogenic bacteria, just make sure that they are all dead. This is done by unconditionally filtering and treating the water. This needs only enough analysis to show that the processes are working, not to actually identify the bacteria.

    It’s a similar situation with particulate matter. Enough filtering and settling will prevent particles from exiting the system.

    And for toxic solutions, chemical analysis is the only way to go. No microscope-based system will show clear liquid contaminants, no matter how good the AI behind it.

    So as good as the work that went into this project is, it really won’t do what it’s meant to and I’m puzzled that it placed at all, let alone got first place.

  • How about controlling the pattern based on the Qduino’s analog inputs? You could set up an acrylic light organ in no time.

  • Another definition is that Ham Radio is the internet and cell phones without the providers.

    Back in 1984 or so, I set up an HF packet radio station and had a conversation that looked very much like something from a modern chat room with an Italian operator from my North Carolina home on my first try. So I had a keyboard/display interface, digital data and international reach, but without wires, routers or charges. Of course, it was only 300 baud, but who types faster than that anyway?

    Using packet store-and-forward systems is like e-mail, but again there’s no ISP or charges.

    About the same time I was playing with packet, I was up on a mountain top one day and wanted to let my wife know when I was getting home, so I accessed the Raleigh repeater (125 miles away but clear in line of sight), brought up their phone patch, dialed my landline and was talking to my wife. This was the year the first mobile phones went on sale in the US for $4000 each. I was using an established ham radio network to call home on a $125 handheld.

    Ham radio will also help you with your wifi and cell projects. How would you like to extend your wifi range to miles? Ham radio skills will let you build a directional antenna that will do just that. How would you like to concentrate the power from your cell so that you always have max bars? Again, it’s it’s as simple as attaching a better antenna.

    So jump in and learn about this radio service that is free and totally relevant to the modern world. You can use it to prototype your next killer product, just the way it was used to prototype today’s daily technology. and have a LOT of fun.

  • As opposed to authoritarian capitalism?

  • Shawn says “Note: The Raspberry Pi Zero W should also work with this tutorial, if you want a smaller option for your project. ”

    I say, good luck if you want more than one. I recently tried buying a second one here, multiple months and orders after I bought my first one from SF and was told that the RPi foundation has decreed that I may never ever buy a second Zero W board from SF. Nice to know that the spirit of Kafka lives on at RPi (that bunch of giant insects).

  • Yeah, well, when I got my Heathkit boxes SparkFun wasn’t around yet. In fact, not sure if Nate was even a gleam in his daddy’s eyes yet. The next time I need one of these, I’ll definitely get a SparkFun box, but Heathkit equipment doesn’t seem to die (even though the company did).

  • That’s why I have a couple of these babies (and one for caps, too).

  • I went to college in southern California where the weather was perfect and (at that time) the roads were wide and empty. I commuted 20 miles a day for 3 years on my bike, which I still have (it’s 43 years old with over 64K miles on it). The dark side, of course, were the cars. I was hit 3 times. Fortunately, the worst damage to me was a scrape that was covered by a large band-aid. The bike needed a new rear wheel.

    I think it’s cool that SF is bike-friendly. The repair shop is especially nice. Sometimes the choice is to limp either home or to your destination. Having a repair shop helps tilt that toward work.

    I see commuter biking as supported on the tripod of safe roads, support facilities at work (parking, repair shop and showers) and a doable ride (one way distance < 15 miles, reasonably flat on the average and good weather). By that criterion, I’m missing 2 of 3 legs where I work now and the 3rd leg is sketchy. Not feeling suicidal, I now do my biking on the weekends on dedicated bike paths where the only hazard is dawdling pedestrians who don’t realize that a lack of cars does not mean a lack of traffic, causing them to spread out all over the bike path.

    Hope your crew has fun.

  • The idea of using WIFI to trigger explosives makes me very nervous. I’ve been working with WIFI (as in RF design and embedding in computing products) since the late 90’s and want to emphasize that the average hacker/maker should NOT buy an off-the-shelf WIFI board and just put it into a pyrotechnic controller.

    For this kind of application, there should be modifications to improve the datalink’s reliability and immunity to accidental and deliberate interference, as well as protocols to guarantee that only authorized members of the subnet have access. Fail-safe high reliability coding should be used to guarantee that in case of error the system shuts down and disconnects from power.

    The electrical and physical construction should continue this theme with hardware interlocks and the ability to remotely mechanically disconnect from power. As the article says, do your research. Even better, apprentice yourself to someone who has done this professionally for years.

    That said, cool article. I wish I lived in a state that allowed this kind of stuff.

  • Yes. That’s it, exactly :-)

No public wish lists :(