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Member Since: January 21, 2015

Country: United States

  • El Duderino,

    Thanks again! The EEPROM erase program clued me in on where I was getting hung up. I reprogrammed the qwiic_button into a 4x5 matrix qwiic_keypad for use in another project. The ATMEGA328 was working great, but I couldn't get the ATTiny working. Turns out you guys were using more EEPROM than I anticipated. After clearing it out and reloading my code everything worked great.

    Don't know how I missed the code earlier. I had actually looked for it, but clearly not in the right place.

    I appreciate the help!


  • Mr Lebowski (Sorry - I mean El Duderino),

    I must have been looking in the wrong GitHub repository earlier. I can see the code now and I appreciate the update.

    Best regards, Brent

  • I'm disappointed that you don't share the ATTiny source code for this as you do on the qwiic keypad. I'm porting over the qwwic keypad code to modify for my changes, but it would have been good to see what you guys are doing for a starting point - just so I can keep it reasonably compatible with the rest of the codebase.

    Thanks as always for a good product.

  • Nice product! Powers right up - although I had to slightly modify the Arduino code to get it working. The board default address is 0x11 hex - but the code is set up to use 0x63 hex. Changing either one works well. Also Nick (I think) looks like he accidentally uploaded a downlevel Transmitter test code. It was including the Si4705 library instead of the Si4721 lib. Changing that and adding in a few calls to turn on the transmitter had this working great and sending the RDS messages just fine.

  • Hey Shawn,

    Good article. I almost commented after your first antenna effort, but didn't want to seem overly critical as the wiki you were following had some good general ideas. I would like to second #394180's comments below about the ARRL books though. Being a long-time ham, I have learned a lot about antennas from reading through the ARRL Handbook (which is republished every year, so stories and information varies).

    Biota's original instructable has a few minor issues that are addressed in fairly good depth in the instructable's comments. The higher yield comments concern using copper wire instead of paperclips, and using an regular dipole instead of the folded dipole as the driven element. Lot's of good discussion on his site, but these are two things that will yield a better antenna and more consistent construction results.

    The ARRL books take you through the math with some fairly simplified formulas, but there is also a lot of antenna lore and rules-of-thumb that you can get out of it that are a big help. In general though, putting ANY kind of reasonably matched external antenna is going to greatly improve your wifi connectivity. I have little experience building circularly polarized antennas, but I have read some interesting things about them in the ARRL Handbook and agree that that will probably have the best results in this case.

    Thanks for the continuing good thoughts.

  • Cool project! I like your improvised vacuum forming setup.

    We used to do this in wood shop (back in the day...) and there are a lot of instructables that show how if searching DIY vacuum forming. Most of them look pretty much like the setup we used (or you used) except to say it is much easier if you use an oven to heat up the plastic. We could form 1/4" thick plexiglass fairly easily.

    Hadn't thought of that for a project container.... great idea!

  • These ATtiny parts are incredibly handy, thanks for the excellent tutorial!

  • SparkFun got a nice little write-up for this board on the Hackaday site

    The consensus seems to be that we like Nate's new direction. Keep up the good work!

  • It would be interesting to see if a Taser-resistant garment could be made out of this stuff... The resistance might be too high. Curious.

  • Jimbo,

    I don't know if you're still monitoring this thread, but what are SparkFun's plans regarding Eagle in consideration of Autodesk's recent announcement that they are moving to a subscription only pricing model (except for the free version...)?

No public wish lists :(