SparkFun will be closed Nov 26th and 27th for the Thanksgiving holiday. Orders placed after 2:00pm MT on the 25th will ship out Monday the 30th.


Alexander Riccio

Member Since: April 19, 2012

Country: United States



  • Whoa @ the clock that plays life!

  • Yes, I’ve tried this - they’re too weak.

    HOWEVER - 8xC batteries & 8xD batteries work very nicely, and I prefer them to the lithium batteries that are seen in the product video (PRT-10470)

  • I’m guessing that a PNP/pMOS transistor would accomplish this far more effectively than a reed switch of greater complexity. The PNP/pMOS transistor performs a logical inversion - thereby switching off when the reed switch is closed (conducting), and switching on when the reed switch is open (“off”).

    Sparkfun (and every reputable electronics supplier) carries both.

    PNP Bipolar-Junction Transistors: https://www.sparkfun.com/products/522

    p-Channel MOSFET (pMOS): https://www.sparkfun.com/products/10349

    the MOSFETs are better for higher current applications, but (speaking only for myself) are more slightly less intuitive for a beginner.

  • Datasheet?

  • Sparkfun - I’m going nuts trying to get these to work! Could somebody provide a nice tutorial/good schematics???

    I have a feeling it has something to do with the fact that the horns are a massive inductive load, but I don’t understand why that prevents a SparkFun li-poly battery + 5x 2.7v 5F supercaps, from driving it.

    I’ve tried using the 20A SPDT relay, but the tutorial is for a different relay, and I think the datasheet is - for lack of a better word - crap.

    Of course you’re gonna immediately think “BEEFCAKE KIT!!”, but I’d appreciate something more fun :)

  • LOL – any idea where I can get one of [Air Horn/subway]???

    Also: Be careful about quieting parties with it. Certain parties might actually like it ;) http://www.youtube.com/watch?v=P6NoOFuvyq0

    edit: changed ambiguous “these” → Air horn/subway

  • Boom. http://www.youtube.com/watch?v=m4R3hODnTGo

  • Buying this for my sparkfun soldering iron, was easily the best soldering decision I’ve ever made. This is better than the stock tip by an order of magnitude, of magnitudes.

  • I bought this to replace the stock tip on my SparkFun soldering iron (TOL-10707). Buying this possibly was the best (soldering) decision I’ve ever made!

    It transfers heat better, is more precise, and is all-around a better soldering tip, by at least an order of magnitude.

  • As long as they follow good procedure, who cares if it’s easier - it already takes just the “blink of an eye” - http://www.infosecisland.com/blogview/21043-Why-Security-Through-Obscurity-Still-Does-Not-Work.html

No public wish lists :(