Tech VideosI tried finding Hidden Gems on AliExpress & got...

I tried finding Hidden Gems on AliExpress & got NASA Technology?!

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46 COMMENTS

  1. That OLED screen most likely failed QC in some factory and got sold on AliExpress to make some money out of what would have been trash otherwise. As people often not return defective stuff on AliExpress, they make money with it. Even if someone returns it, they can still sell it again or throw it away without loosing money.

  2. UV resin has many niche applications. I find it works pretty well when you need to glob material onto the outside of something to immobilize it. I've used it to keep a cracked phone glass from becoming a problem, to keep a M-F antenna adapter through a PVC cap from moving around, preventing loose bits on pcb boards from becoming fallen off bits, etc. It really benefits from having a well prepped surface, roughed up and cleaned with acetone (if possible). It doesn't work so well when mating 2 surfaces together, but I've been able to get a limited amount of obscured resin to cure by setting it out in the sun for a while. IMO, that's the best way to cure resin — there's few UV sources better than direct sunlight! It's also good at reinforcing wire soldered to pcb pads and those tiny screw terminals you frequently find on voltage convertors and diy connector ends. Just screw in your wires and glob it up with resin and you've got a significantly more reliable connection

  3. I'd like to build a portable smart tv, with extra features possibly, with a 12"-14" or ok larger screen, maybe use a pie, and a 3D printed battery pack, that is as large as the screen, from 2.5ah 18650's about 36 cells , 11.1v nominal, incorporate a buck boost to charge the battery, from about any DC source, a USB 5v , possibly 2 amps, most of the USB supplies I have do about 1.6a or drop to about 4.6v to get 3amps they are rated for. The 2 amps are good for about 1.6-1.8a set up the cc cv converter to charge at 600 ma.and 11.9v-12.0v with a BMS with balance maybe have a fast charger to charge with a 12v-19v charger, to charge at 2-3amps at 11.8v 12 watts from USB shouldn't be too much! 36-48 watts fast charge. Maybe both for when you just in a hurry! But this isn't going to charge a 26 ah battery that fast..just shy of 300wh this should allow a fair amount of tv time.. .400a at 5v, with a small 3-5w stereo amp, running at 12-14v with 2" woofers maybe some tiny Tweeters can be found, or use lap top speakers. With a wood frame , aluminum backing for the screen. Then the battey compartment, it should be about 1" thick or 1.5" or less. It should pull no more than .5amps at 11v this should last 48 hours? Awesome 👍 video!!

  4. Interesting content – but his random use in pronounciation of "the" and "thee" drives me crazy (and makes it harder to understand) maybe check up the rules of when to use "the" or "thee"…

  5. We use a lot of UV cured glues at work, and these do work well. Once the cross linking starts to happen near the edge it quickly propagates to the non visible polymer. It's all in the chemistry.

  6. Those stick on "boosters" were the rage many years ago, and I gotta say, they did actually boost signal about one bar. This was before smartphones.
    Funny fact: If you take apart an Amazon FireTV stick, guess what's inside?
    😁

  7. I don;t think that the test that your did on the UV resin is a typical use case because the light source could not get to it. I have used UV resin plenty of times for things such as quickly tacking wires, glueing glass etc., where it is really useful due to being able to position and then rapidly set.

  8. If the antenna boosters worked, the phone manufacturers would naturally install them in the phones from the start.

    It's the same as the miracle devices for cars, claiming to improve fuel economy. Why sell to customers, when you could sell many more to manufacturers.

  9. I use the UV resin to hold parts in the desired position since it hardens in seconds then add 2 part epoxy to permanently fix it in place. The UV resin keeps it in place while the epoxy is curing

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