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  1. Osmium

    Lullaby circuit

    There are some kits available: http://www.kitstop.com.au/page9.htm check out KSSM150 USB Sound Box at the end of the page
  2. Osmium

    Need help to create safety device which will stop window blind going down if something is in the way

    Safety edges = rubber strip which acts like a switch when compressed: http://www.edata.omron.com.au/eData/Safety_Edges.html
  3. Osmium

    Light Bulb Technology?

    It's not so much "keeping the incandescent bulb alive", Joe. Those smart people asked a question something like "Is it possible to re-direct radiated energy using nano-technology so that 'unwanted' energy can be re-used to make desired radiated energy?". The incandescent bulb is a convenient...
  4. Osmium

    Need help with LED flash trigger for camera

    Wait... just thinking about your original post... What sort of 100w LED are you actually talking about? I have this sinking feeling that you mean the household type of 100w LED lamp (actually 20w)? If that's the case, then you can't pulse those in the way that you want - sorry.
  5. Osmium

    Need help with LED flash trigger for camera

    The camera's synch terminal, either on the hot shoe or a separate connection is the way to synchronize the flash to the shutter. Assuming that you DO NOT want TTL control of the flash output, then you can adjust the output of the LED by pulsing it on for a varying duration. Let's say 1/10000...
  6. Osmium

    Culture Fix

    Oh, and thanks for the trigger:
  7. Osmium

    Culture Fix

    well... no, he's outside looking in...
  8. Osmium

    Culture Fix

    Koyaanisqatsi. Every few months I have to get my Koyaanisqatsi fix. Whack in the DVD and let Glass's music and Reggio's visuals wash over me. It's a double act for me: a beautiful piece of art and a trip down memory lane. Seeing people walking the streets in the late sixties through seventies...
  9. Osmium

    My 13 year old son

    When I was your son's age magazines were a great source of information and ideas. For me, in Australia, it was "Radio, Television & Hobbies"... These days, magazines have to compete/merge with the internet but many are still relevant. Electronics is such a broad field it can be difficult to...
  10. Osmium

    what am I

    OK. Dekapot now added to list of cool devices I "need" to own... Thanks for the info. And here's a cool vid with a different version:
  11. Osmium

    How can I power a small device long enough so I can switch power sources

    Do you have enough room to handle two AG9800M devices with two RJ45 inputs? Connect your second source before disconnecting the first one - then have some switching logic to flip when one of them is disconnected... maybe... just thinking out loud...
  12. Osmium

    Light Bulb Technology?

    and then there's this: http://www.bbc.com/news/science-environment-35284112
  13. Osmium

    Magnetic Levitation

    To get you started in your research: https://en.wikipedia.org/wiki/Lenz's_law Have fun!!
  14. Osmium

    Rf transmitter with 2 receivers

    Hi Crazy, I don't know where you're at with this but I've found these eval kits on digi-key: http://www.digikey.com/product-detail/en/EVAL-418-LR/EVAL-418-LR-ND/670150 At that price, you could order two kits and then add the enclosures, extra logic and so on for under $400 (my estimate) for...
  15. Osmium

    Requesting help for my project..

    I just googled 'internet of things': "About 729,000,000 results (0.49 seconds)" - try it, you should find some ideas there.
  16. Osmium

    Requesting help for my project..

    Pick an aspect of one of these: http://www.networkworld.com/article/2921118/careers/nasa-details-bleeding-edge-communications-ideas.html
  17. Osmium

    Light Bulb Technology?

    I replaced 2 4' twin fluorescents with equivalent led tubes. They are brighter, instant on, very pleasant light. 12 months now. Very happy. The remainder of the lights through the house are slowly being converted - no issues so far.
  18. Osmium

    Light Bulb Technology?

    "Internet of Things" connectivity eg: Philips 'Hue'. Controlling mood, scenes, reactivity via connected apps.
  19. Osmium

    Solid state step up voltage

    Harald, it comes from this wikihow page: http://www.wikihow.com/Convert-DC-Power-to-AC-Power The missing piece of info is that the relay contacts shown are normally closed. Remember vibrator power supplies in old valve car radios? (oh... crap... yes I am that old...). The vibrator worked...
  20. Osmium

    Rf transmitter with 2 receivers

    I think this is the logic... B1 B2 B3 B4 AFAD1 AFAD2 1 X X X STOP STOP X X X 1 HORN HORN 0 1 0 0 SLOW STOP 0 0 1 0 STOP SLOW 0 1 1 0 NOP NOP X = Don't care NOP = No operation = do nothing (or could be STOP)
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