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LED Puck: Need an Inexpensive Accelerometer

I thought I’d seen an accelerometer chip recently that retailed for $3-5, but the cheapest I can find on Digi-Key is $7-9. I’m really worried about the puck price climbing out of control. Anyone know of cheap accelerometers?

This entry was posted on Wednesday, December 19th, 2007 at 07:50 am by Keith Neufeld and is filed under LED Puck. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

4 Responses to “LED Puck: Need an Inexpensive Accelerometer”

  1. MsJaye says:
    December 20, 2007 at 12:42 am

    Alas, I’m afraid not. The accelerometer I’ve been using is the LIS3L02AS4 that Digikey sell; I suspect it’s the one you’ve been looking at.

    I’m curious — why have you settled on a case rather than the joy of messing about with resin?

  2. Calle says:
    December 20, 2007 at 05:18 am

    You can sample accelerometers from freescale… Delivery in 2-3 days…
    I really like the MMA7260QT because it lets you chose from between 1.5g/2g/4g/6g using two pins… :-)

  3. Keith Neufeld says:
    December 20, 2007 at 05:38 am

    Calle — I know I can sample chips, and I am already using samples in my prototype. But I want to find inexpensive parts for the puck so that other people, who can’t all be expected to sample all of their parts, can afford to build one too.

  4. Keith Neufeld says:
    December 27, 2007 at 10:39 am

    Ms Jaye, sorry to be so slow in responding to your question about case versus resin. Partly I’ve been busy with the holiday break, but partly I wanted to take the time to give you as thorough an answer as possible.

    I think it comes down to this:

    • I’m personally much more interested in milling an enclosure than in making a form and casting one. Working with resin just doesn’t appeal to me.
    • I don’t know whether any will actually do it, but I think other people are potentially interested in making pucks, and I think it’d be easier for them to do with a milled case also.
    • And not least, I’d like the circuit board to be removable for repair and/or enhancement. I think that’d be next to impossible to do with resin.

    But . . . there’s nothing to stop you from assembling puck guts and casting them in resin, if you were interested. If you do, I’d love to see how it comes out!

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