author
17CommentsJakarta, IndonesiaJoined May 2nd, 2016
Chemistry/design teacher at JIS in Indonesia, part-time fish, part-time geek.
  • D.I.Y Ultra Quiet Shop compressor from a refrigerator motor (compressor)

    Wow! Super well done. It makes me wonder why this style of quiet (albeit low-volume) compressor isn't more popular. I'd much rather have a larger tank (and/or a longer-refill time) than a nasty loud compressor.

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  • ryanjohnlenz commented on FlorianBecker's instructable The ultimate wifi network2 years ago
    The ultimate wifi network

    Nice :) (agreed)

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  • 8 Pool Noodle Life Hacks & Diy's

    I'd put up with a little bit of vacuum to gain the added R-value from having a hole in the bottom of my insulator! If it was really a bit concern, you could cut a very narrow channel down the inside of the noodle. At least that way the cool air would (somewhat) pool up inside the channel (versus constantly dumping out via convection currents from the hole in the bottom). Great instructable--some very interesting ideas (especially the floating toilet-chemical ring! Genius!)

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  • ryanjohnlenz commented on MadScienceHacks's instructable $2 vacuum sealer Life hack2 years ago
    $2 vacuum sealer Life hack

    Great idea. It looks like very little air is able to infiltrate through the tape-sealed hole--but that step looks a bit vague (at least in the video). It looks like you put the tape over the entire bag-tube-hole assembly, while the tube is still in place, then pull out the tube and quickly press the tape down? Could use a tiny bit of clarification (or another angle of video) of this step.I also wonder if one could find a larger volume syringe to make the evacuation process a bit more efficient. Anyway, great idea and nice instructable.

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  • ryanjohnlenz commented on ianvanmourik's instructable OPEN SOURCE AIR PURIFIER2 years ago
    OPEN SOURCE AIR PURIFIER

    Good idea, KosmaE, but just to point out the (semi) obvious.... keep in mind the filter wouldn't have any ability to filter out any significant amount of CO. If a CO sensor were incorporated, it would only be useful as an alarm (which would also need to be integrated into the design).

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  • Grow Onions from Discarded Onion Bottoms

    I understand how electron transitions cause X-ray emission (and subsequent emission of photons from the excited phosphor), but your explanation is true both for 'compact-type' and 'tube type'. I never claimed that "all CFL's are created equal". I said that a CFL and a tube-type fluorescent are fundamentally the same. You claimed that "CFL's provide horrible light for plants", which is an overly-general statement and there are countless successful grows happening under CFL's (as well as tube-style fluorescents). Sure--there is going to be a lot of variation on the spectrum based on which elements and phosphors are used, and this variation *might* be responsible for your die-off--though most CFL's are not designed to put out large amounts of UV. That would obviously...

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    I understand how electron transitions cause X-ray emission (and subsequent emission of photons from the excited phosphor), but your explanation is true both for 'compact-type' and 'tube type'. I never claimed that "all CFL's are created equal". I said that a CFL and a tube-type fluorescent are fundamentally the same. You claimed that "CFL's provide horrible light for plants", which is an overly-general statement and there are countless successful grows happening under CFL's (as well as tube-style fluorescents). Sure--there is going to be a lot of variation on the spectrum based on which elements and phosphors are used, and this variation *might* be responsible for your die-off--though most CFL's are not designed to put out large amounts of UV. That would obviously be a major safety issue. But there are a whole lot of reasons that (wouldn't show up on your data-logger) that plants die (or appear 'burnt'), and I'm guessing engineering doesn't focus a whole lot on the biotic factors (i.e. diseases/pests/etc.) affecting Philodendron growth! At the end of the day, CFL's and fluorescents--like all lighting options--have certain advantages and disadvantages, and are (or, were...) a great fit for certain situations. It does seem that with the drop in price of LED fixtures, the CFL/fluorescent days are coming to an end! (YAY! nobody likes mercury compounds in their home)

    Yep. Fluorescents just aren't that powerful--and that (along with toxicity issues) is their main drawback.

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  • How to Make a Spray Bottle That Works in any Direction/Position

    I wonder if you could use a two-part 'putty-type' epoxy? I think some of the heavier-duty ones are quite dense and are probably less reactive than metals. Might have to get a bit creative in getting it to stay fixed to the bottom of the tube--perhaps building in a bit of a bend at the end of the tube so that the epoxy weight can't slide off as easy. One could insert a temporary wire into the end of the tube as the epoxy hardens.

    You've been doing this with spray bottles for years? Impressive! I thought this was a pretty neat idea. Though I do think you make a good point about the silicone tubing--it is much more flexible than standard aquarium hose, which is actually pretty stiff and I'd be surprised if it would make a "U-turn" in the confined space of a narrow bottle.Have you noticed any corrosion on the fuel tank pickups? I could definitely see (as EmmitS points out) some cleaners being pretty rough on these metals. Nitro fuel is probably pretty 'kind' in terms of corrosion....built in oil!

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  • The single most effective way to get rid of a sunburn

    Linda: I've got to ask--how exactly does the sunburnt area lack electrolytes and/or trace minerals? I've never seen a mechanism to explain, let alone a controlled study giving any indication of this. Please source.While I do understand that you, as a fair-skinned person living in a sub-tropical climate, have seen your share of sunburns, I'm not sure that your claim is scientifically valid. These 'colloidal trace mineral' supplements have a dubious reputation and are likely right up there with homeopathic 'supplements' (i.e. very expensive water) in terms of their actual therapeutic effects.

    Hi @MichaelG9, me too! Its too easy to assume a treatment worked because you "felt different" the next day, but of course you most likely would have experienced some decrease in symptoms even if you'd done nothing! We really need a controlled study, but even a simple treatment where a uniform area (i.e. a nicely lobstered back) can be treated 50/50 (w/ tea and w/o tea) and the results examined.

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