Wireless relay control of relays


19 Responses to “Wireless relay control of relays”

  1. Crispinus211 says:


  2. Takuan says:

    you never had the joy of discovery as a child of things actually WORKING? It turns into quiet satisfaction as an adult – no where near as good.

  3. Kimmo says:

    Strictly speaking, she doesn’t demonstrate how to do it, merely that she has done it.

  4. Anonymous says:

    Limor completely rocks my world.
    I have a buddy coming round in few moments to assist with transistor matching so I can start my x0xb0x.

  5. Anonymous says:

    @Kimmo – the schematic is on the site if you follow the link to adafruit…

  6. Drew from Zhrodague says:

    Hooray Limor! Nice to see your fruits on BB every so often.

    We’ve had mention of some of your neat projects at our Hackerspace Pittsburgh, http://www.hackpittsburgh.org – Almost time for POV LED fun with Ardionos!

  7. Anonymous says:

    Limor is completely hot.

    @Takuan – You should check out her site, she has some very easy to assemble kits (just basic soldering) that do cool things, like the tv b gone. Satisfying to assemble, and fun to impress friends with. An her arduino kit is, i think, the best one out there.

    I’m using her wave shield in a project now, and read about the wave bubble for additional coolness outside my reach.


  8. Crispinus211 says:

    @1,3 Taukuan:

    I’m not saying What?! to you, but to the post itself. I don’t understand a word of it! MY childhood discoveries were not of this order.

  9. Anonymous says:

    So, what’s the difference between a latching relay and a regular one? So long as it’s at least DPDT (AFAIK they all are) then you can make any relay a latching one…

    PS: For the first time ever I’ve failed the captcha… Both words were unintelligible, so I gave my best guess for each. I was told I failed the turing test and was booted back to the original posting, my text was cleared from the textbox. Someone might want to look into this at some point… Were I not a random useless anonymous poster my suggestions might carry more weight, but really, I’d have hoped it would at least preserve my entry instead of eating my text.

  10. Takuan says:

    what are you waiting for? Get down to the local electronics shop and get a kit!

  11. Takuan says:

    start with something simple and give it to a kid after you are ready to move up.

  12. Blondy says:

    Don’t forget to put a diode across the windings of the relay to prevent the back emf from blowing out the solid state components when the relay de-energizes.


  13. sisyphus321 says:

    XBee works on 2.4 GHz. I assume this is the 2.4 GHz ISM band which is also used by WiFi. Any ideas on how/if XBee plays nicely with WiFi?

  14. Takuan says:

    I love this stuff! Even if I never get around to using that particular thing, I enjoy thinking about what some tinkerer somewhere is developing. Makes we wish I were twelve again.

  15. Anonymous says:

    #4 actually, i -do- show how to do it, but BB did not link to the original blog post tutorial which is here:

    #5 there is a diode across the relay, its visible in the preview screenshot, wrapped around on the righthand side

  16. allenrl says:

    You can find solid state relays for cheap these days… If you can’t find one that’s “latching”, you can always use a flip-flop to make it latch.

  17. InsertFingerHere says:

    First, I am _SO_ glad they showed the cat at the end. I thought a certain substance was adversely affecting my perception.

    Second, first time I’ve heard of a latching relay, and I’m in love. Perfect device for battery operated do-dads. And best of all, they are immune to power loss. It’s like a 1-bit flash memory cell, only it can connect to line voltage.

    Third, some relays have the diode built-in across the coil. Might save room in the final project.

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