caseyh

Member Since: October 15, 2008

Country: United States

  • Product WIG-12000 | about 3 months ago

    Any chance the WAV Trigger firmware itself can be open sourced? I would love to have a few more features on this, including the ability to write WAV files to the SD card over serial, as well as increase the number of supported samples.

  • Product SEN-10742 | about 2 years ago

    My logger has been running for over a year now in Seattle: http://nwrs.net/radiation/

    Typically, not much happens, but occasionally i get some interesting “upset events”. I am not sure if it is the hardware wigging out, or if these are real. The sensor is on a table facing a corner of my house with nothing disturbing it. it is not pointing up either.

    Had a burst of 1314 cpm last month with similarly high peaks for over an hour: http://nwrs.net/RadiationBurst-043012.png

    also, had a similar event that only lasted about a half hour in july: http://seattlewireless.net/~casey/?p=129

    Anyone have any thoughts on this?

  • Product WRL-10154 | about 2 years ago

    Talk about working out of the box. Highly recommend!!

  • Product WRL-10153 | about 2 years ago

    Yes, you can transmit and receive anything between 260MHz and 960MHz. That being said, there is a filter in place that will probably significantly limit your range outside of its intended band of operation.

    Even at something like 550MHz, I have these things about 30 feet apart (with a couple of walls), and some random wire antenna of improper length, and they work fine using the RF22 Library’s datagram server/client. I see an RSSI of 125-130. No errors.

    The 550MHz setting is seeing much better SNR than the 433MHz setting, so I suspect these filters aren’t that tight.

  • Product PRT-10527 | about 2 years ago

    These particular solderless pins make an extremely snug fit, so much that they are just as secure as soldered pins. I tried putting them in by hand, but that proved to be impossible. Using pliers and a bit of force, I was able to rock them back and forth by squeezing the plastic sides. Any other orientation, and you end up covering up the through hole with the other end of the pliers.

    These probably are not the best for temporary headers.

  • Product DEV-10744 | about 2 years ago

    Any fix for this issue? I am having the exact same issues with 0023, OSX, and this board.

  • Product SEN-09848 | about 3 years ago

    I have been running this sensor long term since late March 2011 in Seattle. I graph the data here:
    http://nwrs.net/radiation/
    The background radiation is generally low and stable, but I do have a very strange event logged on July 4, (up to 705 CPM!!) where i received some very high readings for a half hour, and then an additional blurp about an hour later:
    http://seattlewireless.net/~casey/?p=129

  • Product SEN-09848 | about 3 years ago

    This is a great product, and I was lucky to have ordered it before the geiger counter rush.
    This device spits out a random ASCII 1 or 0 on each count, so if you want counts per minute, just count the number of characters received on the serial within 1 minute. I wrote up a python script to do this and http post via curl once a minute on my mac. Its been running constantly since this spring.
    I also had the opportunity to accidentally grab this circuit board behind my computer (i though it was a phone) and received quite a zap. I rate it as the mother of all static discharge shocks. No burns, still alive ;)

  • Product TOL-09625 | about 4 years ago

    Mine came today. Wow, what a neat little device! The packaging was quite thoughtful, as i felt like i was unboxing an iPhone. I never thought an o-scope could have so much sex appeal.
    The battery has a connector, so no soldering involved. However, assembly directions are very minimal. I still for the life of me can’t figure out how to get the snazzy metal back to stay on, and it took me a few minutes to determine that some random 3M sticker thrown in the box is actually a screen protector (!).
    It was simple to turn on, load some Arduino PWM software, and watch it go. The buttons are not exactly the solidest in the world, but once you get used to how they work, you can easily control the highlight around the screen to adjust various settings. The frequency readout was quite nice and accurate. The screen is bright and readable, no real complaints on that front.
    here’s a little demo and unboxing video: http://www.youtube.com/watch?v=oZI5r_wfldo
    I think this is a must have for any geek, budding uC developer as you can flip it on and get instant results why things are broken.

  • Product SEN-08880 | about 4 years ago

    This sensor is a little warm to the touch, but its not anything unreasonable. What do you expect for something with a piece of NiCr wire inside that needs to heat another “resistor” to react to gas properly? It consumes a steady amount of current, so I didn’t bother regulating its current, but perhaps that would not be a bad idea in case of some sort of failure.
    I watched the values normalized over time during break in. Somewhere around 12-18 hours I think its usable, but it almost seems like the full 24 hours is actually required to make sure that its accurate before calibration.
    I still haven’t really come up with a good calibration yet, but we can at least tell if an engineer has had a few beers (or not), along with a nearby cotton ball of rubbing alcohol. I do have a BAC tester, so perhaps I might have a crude ADC calibration soon.

No public wish lists :(