#146 – Hamvention, Arduino and Intel – Burdensome Background Battology


  • A new t-shirt idea? Dave didn’t understand the reference to “All your base are belong to us
  • Dave’s op amp problem turned out to be from the rails (or so he says!). The “burden of experience” had him testing (and had Chris guessing) at all the wacky things it COULD be before checking what it actually was.
  • Learning how to read schematics comes with time. Bob Pease schematics were notorious for being hard to read.
  • Would there be interest in doing obfuscated circuit contests?
  • Chris just got back from Hamvention, down in Dayton OH. It was great!There was a meetup on Saturday evening, where some t-shirt wearing listeners came to hang out. They were awesome!
    Thanks to Bill Boyer (far right) for the picture!

Lost and found: At the end of the meetup at Hamvention, Chris found a pair of Ray Bans. If you lost a pair, please send an email to chris@theamphour.com.


  1. says

    Chris, you mentioned learning Python in this show and I was curious if you’ve seen Learn Python The Hard Way (available free here http://learnpythonthehardway.org/book/ ). It’s meant to be a very pragmatic and opinionated way of teaching the language, with a major focus on writing programs. I liked it a lot because each lesson is short and to the point. Check it out if you haven’t seen it already.

  2. says

    Chris, I really enjoyed meeting you at Hamvention. It was too bad I could not attend the get together Saturday evening, but the FDIM banquet was well worth it.

  3. says

    OpenWRT is a linux distribution focused on very underpowered SOC. Originally it was developped to be used as an alternate firmware for the DLink WRT54 wifi router (hence the name). Now it’s the birthplace to a truck load of ports to cheap harware, like the ever popular TP-Link TL-WR703N wifi router

  4. says

    Arduino Yún :
    Yay, another Arduino wifi shield at 3x the price of TP-Link TL-WR703N, but this time _IT IS_ TP-Link TL-WR703N (ar9331). They basically took TL-WR703N and transplanted it into a shield PCB at triple the price.
    Lets hope it will introduce Arduino people to Linux and make them migrate away from AVRs. Although knowing them we will still see project using three 400MHz 32bit boards chained together just to turn on the light over the internet.

    Masters in Python? Sign me up! 😀

  5. Alan W2AEW says

    FYI – hamfests are generally early morning events, at least in the US. Around here (NJ), most open up for vendor/seller setup around 6AM, and open for buyers by 7 or 8. They usually are wrapping up by 11-12. Chris, you should check into locally run hamfests, might be a good place to find parts, equipment, etc. of course they’ll be orders of magnitude smaller than Dayton.

  6. says

    linux can kind of run without an MMU, you basicaly just dont have a fork syscall, only vfork, and all programs land in the same memory space

    vfork was originaly a speed hack to make the child use the parents memory space (no copy) while the parent is frozen, and also happens to fit MMU free cpu’s perfectly

    but you would loose all of the cross-process security and other stuff