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

You can get the featured products here: (affiliate links)

In this video 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

[gigaherz_]

That drill grinder is no good! It removed the relief angle, meaning the drill will rub and create friction instead of cutting!

[dm]

The cutting edges on the sharpened drill bit look horrible tbh

[taukakao]

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.

[chk]

As an electronic hobbyist. These videos are perfect for me to know about good modules available saves a lot of time and money. Love your videos. Keep posting ❤

[SuperShecky]

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.

[BerserkEscaflowne]

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".

[DuroLabs]

I would lovvvve to see the FPGA programming series :D

[AnnoyingRash]

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.

[pankajagamage]

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.

[mikD]

Your hand writing and diagrams are still the best.

[mikeselectricstuff]

Lack of fuse on that battery monitor is scary.

[tvtoms]

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.

[mikeselectricstuff]

A recent favorite of mine - WinApex 268B clampmeter - does 0.1mA resolution on AC current and 1mA on DC, and ridiculously cheap. Super handy for AC mains stuff like checking earth leakage.

[BestHakase]

The ruller is actually very useful. It is not a new device, just digital version of analog rullers. Main use case is to measure length of curved lines. I was using this type of ruller when i was working in the stained glass workshop.

[johndough]

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.

[sandnshade]

Your hidden gems series is so good! Please keep doing them!

[CedroCron]

Thanks for the Battery Monitor, this is exactly what I needed to keep an eye on the battery in my car. I'm a Paraplegic so getting a dead battery in my car can be a big problem for me because I require a Wheelchair. This will surely help me to replace the battery when it starts getting weak. Even though I test my battery every 6 months with a manual tester I've had a couple of dead batteries at very inconvenient times. This makes it so much easier to make sure it's in good working order.

[Poult]

Are you sure the drill sharpener worked? It looked like the cutting edge was ground off!

[IAmOrion]

I've hoarded a fair few of those DT3 Cable testers. I hot glued a dual coin cell battery pack (with built in on/off switch) to the back and soldered the power wires to exposed PWR and GND wires by the usb socket that would power the device. Super awesome and handy PORTABLE tester that way!

[gadget_hack]

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.