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zakruti.com » Knowledge, science, education » GreatScott!
I tried finding Hidden Gems on AliExpress AGAIN! (SPECIAL Part 10)

I tried finding Hidden Gems on AliExpress AGAIN! (SPECIAL Part 10)

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Rating: 4.0; Vote: 1
we will be having a closer look at 6 different products I got from Aliexpress. Aliexpress is famous for featuring the newest products/ICs when it comes to electronics but finding those can be a bit difficult. So I tried finding the hidden Gems not only electronics related but in general what I think could be useful. Let's get started! Websites shown in this video: Thanks to Ground News for sponsoring this video. 0: 00 AliExpress Hidden Gems 1: 05 Intro 1: 17 Electric Hand Drill Grinder 2: 40 USB Data Cable Tester 3: 53 Magnetic Pogo Pin Connector 6: 29 Car Battery Monitor 8: 35 Logic IC Tester 9: 57 Tang Nano 9K FPGA 11: 26 Round Digital Tape Measure 12: 38 Li-Ion Cell 4S Holder & Protection 14: 39 Verdict
Date: 2024-07-28

Comments and reviews: 20


The best drill sharpener, is the Drill Doctor. Its a lot more expensive. but the ease of use, and the amazing results it produces, is fantastic. Every drill bit I sharpened, made the bits MUCH sharper than brand new, never used, bits. The option to make a Split-Point on your Bits, is also fantastic (as they cut much better / faster.
The only issue I eventually realized. was that I sometimes broke small drill bits, when I was drilling things. When a very small bit breaks in half. its virtually pointless to be able to Sharpen it. because its often too short to even use at that point. As such. so long as you dont break your bits. you are golden. Of course, larger sized bits are rarely broken. and as such, they will always be worthy of re-sharpening.
If you have to drill anything in thick steel. you would quickly find out that you can dull / destroy bits in mere seconds worth of drilling. Use some cutting fluid (lubricant / oil) to reduce friction, and help lower cutting temps. A cooling fan, blowing across the bit and surface, will also help. Do not apply too much downwards pressure. as that can dull the bits very quickly. And instead of instantly using a large sized bit. first start out using a smaller bit to drill an initial hole. Then gradually use larger and larger sized bits, to progressively make a larger and larger sized hole. Keep the drill speeds, a bit slower. and stop often to remove chips / dust from the bit and partially drilled hole (also stopping to cool the bit, and dunking the bit in water, or oil, to cool them down quickly. These will all greatly extend your Bit sharpness / life-span.
Once your Bit stops cutting well. rather than keep drilling. sharpen them. If a bit keeps spinning, and barely making any progress at all. the bit is done, and needs sharpening.
If you do get the Drill Doctor. I advise actually sharpening all of your new, unused bits. before using them. I found that the factory edges were nowhere near as sharp as what I got from sharpening them with a Drill Dr. As such, you have less chances of breaking bits. because they will cut faster and easier. and so you wont be tempted to put too much downwards pressure on them. which is usually how bits end up breaking.
Whether or not you will get your moneys worth out of the Drill Dr, is really down to how often you drill things. and how much you might choose to spend on new bits. But I will say, that even if I never made my money back on the thing. Its great owning it, for being able to get superiorly sharp bits. that drill much Faster and Easier, than Factory sharpened bits.

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Not trying to rag on you, just want to give you a bit of advice that might help you avoid grief trying to use those drill bits.
That drill bit had a whole lot of negative rake (generally considered dull, the edge is pointing back towards you and the drill rather than at the material) it was also sharpened off center, and neither the before nor after tests were producing shavings like they should, they were making dust. I'm not saying the gadget is useless, but it does require a bit of operator skill. There are slightly fancier drill bit sharpeners for not much more that hold the drill bit in a collet and ensure you get a symmetric sharpen, with the proper cutting angles. Not as cheap (50ish euro Not sure) but they work better if you haven't had the chance to learn how to sharpen drill bit manually.

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I have several of those BM6 units. They work great, except for the bluetooth range which becomes worse since the unit is under your metal hood/fenders/etc. I can't even pick up one of the units from my driveway into my house! So I have to walk out there, to find out if one of my less-driven cars already has a dead battery.
I decided to get smart and buy a couple of the BM200's since they operate in the 400mhz range at a higher power! Bzzzz. wrong. if you own ONE of them you're fine! But guess what. they are ALL on the same frequency, with no unit ID etc! I can grab one of the displays and just walk from the front to the back of my place, and it will detect my RV, then all of a sudden my tractor. Oh well. #firstworldproblems. : D

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To the issue with the app needing location permissions for Bluetooth:
This is actually a very misunderstood feature. I don't know about this specific app but I'm guessing it wants to discover Bluetooth devices in the area to find the device.
Since someone could technically track you by having a lot of Bluetooth devices scattered around you, this needs the location permissions. On modern devices, this does not require the GPS permission (exact location) though.

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I'm honestly surprised the drill bit could cut at all. No relief grind after the edge means the edge can't bite into the material you want to drill. I think those gizmos might sharpen bits if you're extremely careful and aware of where the edge of each flute is. But if you're that careful, any bit over about 3mm can be sharpened freehand on a bench grinder or belt sander at least as quickly.
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I love these video series have anyone else noticed that if you search for something special on AE like hearing protection, and do multiple searches that then AE will show you that under the Buy 3 items for $2. 99 that usb tester board looks like an instant purchase lol. But is it anyone except me that hates those blue leds, they annoy the crap out of me lol
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I can't see how that drill grinder can sharpen properly. It only grinds one (primary) cutting angle / edge. A second and deeper angle (relief) is usually needed just behind the cutting edge to allow space for the chips to clear out of the way. Without this the chips don't clear properly and the drill won't work as well and possibly wander.
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That battery monitoring device looks great. BUT. I would not trust that turning off GPS functionality in the app actually turns it off. Would be good if someone could actually analyze the apps source code or outgoing data. Would also be a nice project to capture the Bluetooth data coming from the device and make a website/app for it.
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does that battery app send the location off the phone I mean the functionality of remembering where it was parked doesn't need it when it's from the phone anyway and it just knows that you turned the car off at that place or lost connection to the dongle at that place after walking away from it.
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I find the battery monitor interesting. but connecting with Bluetooth. 10 meters, so probably 5 meters reliably. why bother designing a product with GPS so you can find it If I can't find my car from 5 meters away, I probably shouldn't have a car.
Or am I missing the point here

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I like the idea of the battery monitor, but I don't even remotely trust the toggle switch in the app. or the app. I feel like I would be a little more confident in it if you isolated and disabled the GPS circuit in HARDWARE with desoldering. Wonder how hard it would be to do.
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8: 27 a developer here, yes you need gps permission for bluetooth to work. it's a requirement for an app to enable bluetooth functionality. I don't know how things have changed in the past couple of years since I haven't played around with bluetooth for about 4-5 years.
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Great reviews, but on the car battery monitor, turning off GPS in the app just keeps it from giving you locations. You would need to turn GPS off on the phone or not give the app permission to access GPS to keep it from providing location data to someone else.
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Your catchphrase for this series should be should you CHECK them out. or CHUCK them out! I am waiting for it each time, but you don't say it.
I dunno, maybe chuck meaning to throw is more a UK slang Anyone else here chucks things Haha

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Hey thank you for the content! Is there any chance to see an attempt to fix the output noise of the XY6020L power supply (from the part 4 video) It was a really good product considering its price.
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Why would you install a dedicated vomtage monitor onto the actual battery. That's available right at the OBDII port, and basically every Bluetooth scanner has that functionality built in.
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Pogo pin connectors would be ideal for my model railway lighted, and servo'd buildings. I looked into them a few years ago and did not find them cheaply, so it's time to revisit them it seems.
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Drill bit sharpening is a skill you need to learn and it doesn't include just single plane spinning the bit against the stone like you did. That is a horrible drill bit sharpener.
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I love aliexpress. I use that usb cable tester to test customer cables to troubleshoot their issues. I also got a small vacuum for $2 that i use at my shop regularly for everything.
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the digital tape measure is for measuring distances on blueprints like cables-runs in construction. oldschool solution is a pen with a little wheel at the end and a anolog gauge.
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