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  1. dave9

    Christmas bears repair

    Yes pics might help and if you can non-destructively get them open, taking pics of that too, the problem could be apparent. A random guess would be that some gear might have stripped out or a motor bearing seized.
  2. dave9

    replacing control panel on Treadmill with potentiometer

    Since you did not give us enough info to see a solution, it is not possible, yet.
  3. dave9

    DC Motor supply voltage 6v from 3v3

    Heh... "$4 circuit". If you already have the spare parts and want to build it yourself that is an option, but if you have to order parts, you can get approximately 3 components delivered for $4 (unless it's a chinese supplier so it's taking the month-long slow boat from China) and still need...
  4. dave9

    Question smartphone and battery useful life

    lol, it's not worth the bother to slave over this. Electronics are meant to serve you, not the other way around.
  5. dave9

    Question smartphone and battery useful life

    This is not a problem. There is nothing to do. Li-Ion have low self discharge so it will be find going unused, though if you really don't "want" to use it then you could power it off if you can do without immediate notification of anything happening for people trying to contact you, reducing...
  6. dave9

    I received a message of crystal diskinfo hdd

    This is not a reliable strategy and there is no information we call tell you that will change that. You need newer HDDs or solid state storage that isn't already more than twice its expected lifespan. Clearly you have proof that "some" drives can outlast the average lifespan, but it is futile...
  7. dave9

    powering 2 LEDS or Neons from a 240v feed?

    ^ Seems like something good to do to the plastic encapsulated type with the rounded focal dome on top. For those, I take a file or sandpaper on a flat surface and completely sand off the dome to a flat top then polish to clear again, but for the surface mount LEDs none of this is needed...
  8. dave9

    Noisy CPU fan - reduce its RPM

    The question is whether it was always this loud, or has increased. It is not uncommon for laptop fan bearings to wear out or at least run out of lube, then there is not much you can do (unless you can relube it) besides replacement. Slowing it down is not a good idea at all. Unless there is...
  9. dave9

    Looking for a suitable universal charger for a variety of electronics

    ^ Of course not, what did I miss? I read "charger" and now it's not charger. I read batteries and now it's not batteries! Well okay, I read "I wanna take these things along with aa/aaa batteries when I go out shopping /sourcing to test stuff before buying (then having to return half of it)."...
  10. dave9

    Looking for a suitable universal charger for a variety of electronics

    It seems like it would be better to me to have something battery powered to take to the device rather than expect the seller to let you take it out to your vehicle where you have a power inverter and AC powered supply. What I would do, using parts I'm familiar with, is start out with an 18V...
  11. dave9

    Looking for a suitable universal charger for a variety of electronics

    Buying multi-output supplies for use as chargers is going to cost more than the right (type/voltage not necessarily OEM brand) charger for each device, and could cause customer confusion and possibly damage if set wrong.
  12. dave9

    I received a message of crystal diskinfo hdd

    Look at all the other values that Crystal Diskinfo reports. If you have a lot of 100's or 200's (rounded off #'s ending in zero) that is usually just the drive not reporting an accurate value and no reason to be concerned. However it is always best to have a backup of any valuable data. If...
  13. dave9

    HELP!! What the hell is this piece?

    On second glance, this board looks a little like a rodeo cowboy (excessively bad) design where they just threw on way more capacitance than needed, which could cause an inrush current problem. Is it just the two 4700uF caps, or also 3 more near them, or are there NINE of them including the ones...
  14. dave9

    HELP!! What the hell is this piece?

    Use the info you have to track down the manufacturer or schematic. This does not look like a Motorcraft factory part, rather custom aftermarket for a limo. Without access to someone with this board or having a working board yourself, you're left to DIY estimating the value needed based on...
  15. dave9

    HELP!! What the hell is this piece?

    Agreed, it looks like an NTC thermistor, and after a long time those can wear out, but if you haven't found a fault downstream of it, then I would look for one before just replacing it... especially if you had two that failed simultaneously as that is just TOO coincidental, though I suppose it...
  16. dave9

    Identifying input polarity

    Those are lovely pics for trying to sell an item but not great for trying to trace the circuit. :) Top-down and bottom up at 90' angle, wasted space cropped out, ideally hosted on an image server so they can be high resolution. Bottom up pic is conspicuously missing since that would be the...
  17. dave9

    Identifying input polarity

    Image from: https://www.yumpu.com/en/document/read/11475815/atc-handbook-al-ko Edit: Here's the PDF version: https://caravanchronicles.files.wordpress.com/2013/03/atc-handbook.pdf Don't know if this helps, it's all I saw except some more Al-Ko here...
  18. dave9

    tinning

    ^ While I am an advocate of adding flux if there's any chance it'll matter, I have not seen any instances where components have a plastic coating or are dirty, unless it's some old surplus parts. Even parts I cannibalized myself from gear destined for scrap will have a solder plating on them...
  19. dave9

    Replacing batteries with USB power source

    Yes something similar, though you don't need as high as 5A since your USB supply won't be able to deliver anywhere near that. Lower current modules are smaller, and a "little" less expensive. You ought to determine (measure with a ohm meter/multimeter) how much current the device needs, if...
  20. dave9

    Question SSD china aliexpress

    Cheap can mean many things but usually it means lower performance, particularly if they omit a DRAM cache, and could also mean counterfeit or false capacity rating. Recognize that flash chips are a large part of the construction cost and a highly sought after global commodity and shouldn't be...
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