Member Since: October 17, 2012

Country: United States

  • I wouldn’t turn them away immediately. Just charge them the $6 at the gate. It’s up to your riot-control-bot to decide what to do if they refuse to (or claim they can’t) pay.

  • How about Carabiner. Or looking at the cover image for the last blog post, how about a heat-gun nozzle for SMT rework?

  • I never got onto the CFL band-wagon because of the mercury vapor that is in the tube, just like every other fluorescent light. To be properly disposed of one would need to send them through a mercury reclamation process, not something that joe public knows about.

    The LED bulbs (unless they use some custom and toxic cooling fluid) are no worse than any other electronics. Dispose of them with all your other e-waste that you already know how to deal with.

    My hat is in the LED bulb camp, I have several Cree bulbs in my home already.

  • I know the mosquitoes are big around here, but WHAT IS THAT?

  • Quick question related to something on the PureEngineering website. (Maybe they can comment here.) I see a picture of it plugged into a UNO, pulling power from the ARef pin. Is that really in spec for the AVR chip to provide power on that pin?

  • That’s what I suspected. I missed the zero reference adjustment, but I only scanned the documentation. Good to know that one can program a zero reference in the sensor instead of having to calculate it in the application for every reading. (Loading a known constant at each power up is a trivial function for boot up).

    The main reason for the zero reference question would be to figure out the best place for a center of rotation for a circular scanner. (Or even a scan-line type scanner to “map” a surface.)

  • Nice demo by Nick. I know he was wearing the “black out” glasses, but I wonder if he actually did the demo with his eyes closed anyway. I probably would have to allow me to concentrated on just the sound. He states “hypothesis confirmed”, but what did he think of the experiment? Was it cool, freaky, difficult, all three, what?

    One thing that bothered me about Robert’s presentation… I know the clam knife isn’t sharp, but having any knife sitting on a desk with the edge up makes me nervous.

  • But if one LED fails as an open (like from over-aggressive cleaning to get that dried on blob of food off a LED), wouldn’t the entire strip go out? The old Christmas tree string problem?

    Not a problem, per se, but a design quirk. ;-)

  • This is one of many cases of where “common usage” and “technical accuracy” are at complete loggerheads. Many people call a AA cell a battery… :-/

    Technical accuracy states that a single cell (terminated or not) is just a single cell. In order to be a battery there needs to be multiple cells connected together.

    But, common usage states that both individual cells and batteries of cells are all called “batteries”.

  • Actually, the datasheet that I looked at specified a range of 20m for the LED/Pin model with optics. The Laser/Pin model is (as you said) 60m. The data sheet doesn’t have a configuration for a range limited at 40m…

    One thing that I’m not sure about (either the datasheet, Operating Manual, and Tech Brief don’t mention or I didn’t notice when reading all three) is where is the 0 reference for the measurement? The PIN diode or the front of the optics?