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  1. dave9

    HV Rat Killer

    The better solution is don't allow any areas where they can enter, but you can put the bait in a trap-box where they are contained, then you don't have to deal with killing or releasing it later. For that matter you could make the box small and air-tight when sprung, then the rat will lose...
  2. dave9

    HV Rat Killer

    Not sure where you get the idea that electrocution induced death is a certainty, or humane/painless. Neither is necessarily true, unless you're going to strap the rat down first and put a little homemade rat electrocution helmet on it :D after administering a sedative and pain killer. Perhaps...
  3. dave9

    HV Rat Killer

    No need, merely mix rat poison into the peanut butter.
  4. dave9

    TV remote

    Define accurate. It just has to work.
  5. dave9

    TV remote

    Yes, an LED can be used as a light detection component. Often a transistor is involved to amplify this.
  6. dave9

    Terminal Block to LED Leads

    I don't quite follow why you're doing what you're doing, but it makes no sense to me to use terminal blocks unless you're driving the LEDs so hard that you expect failure. Otherwise, how does it save time to solder wire to a connector then plug an LED into that, than to just solder wire to the...
  7. dave9

    Fan subsitute Watt rating

    What external HDD case is this in? Single HDD? A single HDD does not need much airflow, some enclosures are passively cooled. I wonder if you can just mount a far more common axial fan instead, even if it requires drilling new mounting holes or modifying the case, presuming the warranty has...
  8. dave9

    Questions corrosion

    If you are looking to increase your money by posting, try youtube videos. If you are looking to increase your space, delete the videos off your HDD after uploaded to youtube. :D These videos could even be video examples of massive corrosion, mountains of silica gel, and an ingenious perpetual...
  9. dave9

    Questions corrosion

    Because doing something that works is generally better than something not quite good enough.
  10. dave9

    Questions corrosion

    ^ Great, now unplug it so you aren't wasting 72W heating the area, and get an air conditioner. :p Since it's winter in Brazil, I suppose an argument could be made for using more powerful peltiers to both heat and remove more humidity (if electric heat is cheaper than gas or another fuel based...
  11. dave9

    Questions Metal Speakers

    Not really relevant, the metal frame on an internal speaker is not exposed to view for the life of the TV/etc equipment. Any cosmetic blemish from touching it with bare hands, will not significantly affect its performance or lifespan. If you were instead doing mass production in a factory...
  12. dave9

    Questions corrosion

    Depends on the device and the environmental cause. In general you should not be using a device not fit for that environment to the point where excessive corrosion occurs, OR simply plan on a periodic replacement. There are some design choices such as use gold plating, seal all wire...
  13. dave9

    How to put strong WiFi signal on 5KM Radius

    A microwave signal (2.4GHz) can easily travel 5KM, if there are no obstructions. What exactly do you mean by "DIY solutions". Can you build something out of string and glue? No. If you are an expert in RF communications maybe you can build something from scratch but otherwise, you...
  14. dave9

    Kayak outboard motor

    The thing is, your posting screenshots instead of text and links, is going to hamper your effectiveness in the future, not just this topic. You should make it as easy as possible for others to assist.
  15. dave9

    Kayak outboard motor

    Okay apparently you did not read my prior reply carefully because the gist of it was, don't substitute pictures for text data and links. If that's what we're going to do, then What you linked is not a brushless motor controller, just a PWM linear motor controller...
  16. dave9

    Control alternator voltage back to 6vlt battery?

    I would do some research into another alternative, perhaps a 2S2P array of 26650 Li-Ion would work? Maybe even a single series of 26650 or even 18650. You might still need to clamp the upper voltage, but as far as the battery fitting, if Li-Ion cells fit in a hollowed out flooded lead acid...
  17. dave9

    Kayak outboard motor

    A picture is not all that useful, can't see all the specs, can't copy/paste anything to search for it. However my best guess is no, that is not suitable for controlling a brushless motor. You need the motor specs/datasheet to determine it, and since you only provided a picture of that too...
  18. dave9

    Kayak outboard motor

    Being brushless it must have its own controller so if you don't want it to run full speed you need to figure out the interface to control that, OR it could be acceptable to run it at full speed? Otherwise, you're looking at around 20A current so you need a switch to trigger a transistor or...
  19. dave9

    What is this piece in a cell phone camera?

    Probably an infrared filter
  20. dave9

    DC 9v replacement

    ^ Perhaps, but they don't discriminate different voltage adapters with different barrel plug sizes in any standardized way so there's always been a risk to use the wrong voltage for a device when you mix and match using a different PSU than what came with the device.
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