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How to pick the perfect hot glue gun (that also just happens to look like a sci-fi blaster)

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Seekone 60/100W dual power glue gun

Seekone 60/100W dual power glue g

Adrian Kingsley-Hughes/ZDNET

Talk about tech tools and people usually think about screwdrivers, multimeters, USB testers, thermal cameras and such.

You don’t normally think about hot glue guns.

Also: You’re using super glue all wrong

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But I’ve found that I use mine a lot for all sorts of things, from tacking cabling into place inside PCs to weatherproofing housings for gadgets that are going to live outdoors. And outside of tech, hot glue guns have so many applications, from craft projects to home repair to model making.

Pretty much any project that doesn’t require a high level of strength or heat resistance, as long as it’s not going to be damaged by the application of the hot glue — which, as the name suggests, is pretty hot (temperatures can range from a scolding 250°F/120°C to a searing 430°F/220°C — is a candidate for hot glue.

Also: My favorite electric screwdriver for heavy-duty jobs

Hot glue guns come in all sorts of shapes and sizes, and most tend to look like a Buck Rogers ray gun. But it’s not the design that matters; it’s how it performs.

I’m looking for three things:

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  • A hot glue gun that heats up rapidly
  • Has enough power to deliver all the hot glue I need without stopping to heat up
  • Doesn’t sear my hands when holding it

I did some testing, tried out several different glue guns, and settled on one — the Seekone 60/100W dual power glue gun

Seekone 60/100W dual power glue gun tech specs

The heat gun is made from heat resistant ABS and features a copper nozzle

  • High-tech ceramic PTC thermal heating system to ensure 3-5 min fast preheating time
  • High-strength, durable grip
  • Adjustable 60W/100W – use 60W for small project, 100W with high temperature for large project
  • 110-240V universal voltage

Note: There are rechargeable hot glue guns out there. One type is the hot glue pen that’s aimed at those who want to do crafts (and are a bit underpowered for what we want here), and there are also the glue guns that take power tool batteries, which are great for contractors or DIYers who want to standardize on power sources, but I find them a bit too big and bulky for my use.

Also: Why I love my heavy-duty label maker so much

OK, so yes, it looks like a ray gun, and is a little bulkier than my previous hot glue gun (which suffered an untimely death), but this is not a bad thing. The fact that it’s bigger means it fits my hand better, and the bigger trigger is a lot easier to use, especially for those longer jobs.

Yes, it looks like a ray gun!

Yes, it looks like a ray gun!

Adrian Kingsley-Hughes/ZDNET

First, let me clarify the “dual power” feature of this glue gun. Think of the wattage as a measure of how quickly it can melt the glue stick and dispense molten hot glue from the front. For small projects that need a dab or two, the low-power 60W mode is idea, but for when you want rivers of hot glue, flick it to the high-power 100W mode and away you go.

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Rivers of hot melt glue when you need it!

Adrian Kingsley-Hughes/ZDNET

This glue gun heats up fast, stays hot, and has no problem keeping up with the job at hand. When switched to the 100W mode, I could put glue sticks through this at a rate of one every 40 seconds or so, and at no point did I need to slow down or stop to let it heat up (which is a problem with a lot of hot glue guns on the market).

Also: This stuff is better than super glue

There’s also an indicator light to tell you when it’s on — a handy safety feature!

The indicator light is a handy safety feature that tells you the glue gun is on

The indicator light is a handy safety feature that tells you the glue gun is on

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Adrian Kingsley-Hughes/ZDNET

During testing I had this glue gun running for a couple of hours, over which time I put through it a couple of dozen glue sticks, and it was comfortable and easy to use.

It also remained nice and cool in the hand, which also contributes to the overall comfort of using this glue gun.

The handle stays nice and cool

The handle stays nice and cool

Adrian Kingsley-Hughes/ZDNET

  1. Always read the instructions: Before using a glue gun, be sure to read the instructions carefully. 

  2. Use the correct glue sticks: Different glue guns require different types of glue sticks, so make sure you use the right type of glue sticks for your glue gun. Using the wrong type of glue sticks could damage your glue gun or cause accidents.

  3. Hot glue can cause serious burns: Always use caution when handling hot glue, and avoid touching the glue or the nozzle when it is hot.

  4. Use a heat-resistant surface: When using a glue gun, place it on a heat-resistant surface such as a silicone mat or metal tray. 

  5. Never leave a glue gun unattended: Always turn off your glue gun and unplug it when you are finished using it. Never leave it unattended while plugged in or still hot.

  6. Keep children and pets away: Keep your glue gun and glue sticks out of reach of children and pets.

The copper nozzle does a good job of controlling the flow of the hot glue and making sure it goes where you want it to go, and only where you want it to go.

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And that glue is hot! Here it’s coming out of the nozzle at around 390°F/200°C

Hot glue is hot!

Adrian Kingsley-Hughes/ZDNET

I recommend working with hot glue on a silicone mat. Not only is this heat-resistant and will protect the surface below from damage, but it’s also super easy to pick off any glue spills — it just peels off.

Not only does a silicone mat protect your surfaces from damage, it makes cleaning up spilt hot glue easy

Not only does a silicone mat protect your surfaces from damage, it makes cleaning up spilt hot glue easy

Adrian Kingsley-Hughes/ZDNET

Oh, and here’s a handy tip — if you need to press undo on your hot gluing and need to get the set hot glue off something, a few drops of isopropyl alcohol will make it release.

Isopropyl alcohol will unstick set hot glue

Isopropyl alcohol will unstick set hot glue

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Adrian Kingsley-Hughes/ZDNET

For under $20 not only are you getting a really good, robust hot glue gun, but you also get 20 hot glue sticks to get you started, making the Seekone 60/100W dual power glue gun a total winner in my eyes, and a great glue gun for someone who wants something as little more powerful than a hobbyist glue gun.

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The AirPods Pro 2 could soon get a new USB-C version to ease your cable woes

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One charger to rule them all? That’s the dream and now a new version of the AirPods Pro 2 could inch us closer to it, according to some leaks that suggest Apple could soon ditch the Lightning port on its flagship in-ear AirPods.

The initial rumor came from Twitter user @aaronp613 (opens in new tab), who spotted that iOS 16.4 references some new AirPods and an AirPods case. But crucially, one highly respected analyst – none other than Ming-Chi Kuo (opens in new tab) – quote-retweeted the post, casually surmising that they’re “likely the USB-C version of the AirPods Pro 2”. 

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Why every 3D printing enthusiast needs this $20 vacuum sealer (and how to use it)

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eSun Vacuum Storage Kit Pro

Adrian Kingsley-Hughes/ZDNET

Once someone gets their first 3D printer, it’s not long before they start wanting to experiment with different filament colors and types.

Very soon, there are reels of filament everywhere.

Now, you might have noticed that when you buy a reel of 3D filament, it comes in a vacuum-sealed bag, and there’s even a little bag of desiccant inside. The idea is that this keeps the filament dry because the filament material can absorb moisture from the air, which in turn results in poor-quality prints.

Also: Why I replaced my $40 multimeter with these smart measuring tools

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If you’re serious about 3D printing, you need a way to keep filament that’s not being used in a low-humidity environment, too. And the easiest, most cost-effective way is by using this sealing kit from eSun

What’s in the box

  • 10 x vacuum bags
  • 1 x USB powered pump
  • 2 x sealing clips
  • 15 x desiccant bags
  • 10 x spare valve stickers

Note that there is a less expensive kit that comes with a hand pump, but for the extra $3 or so, I suggest getting the USB-powered pump because it’s quicker and much more convenient.

If you’ve ever dabbled with sous vide, then the process of bagging a reel of filament — the bags are compatible with 0.5KG/0.75KG/1KG filament reels — will be familiar to you.

How to vacuum seal unused filament

The filament reel goes inside the bag, along with a packet of desiccant

The filament reel goes inside the bag, along with a packet of desiccant

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Adrian Kingsley-Hughes/ZDNET

Next, make sure the bag is tightly sealed. The eSun package includes a sealing clip to help you keep the filament well-stored. 

Securely seal the end of the bag, using one of the sealing clip.

The included sealing clip in action.

Adrian Kingsley-Hughes/ZDNET

The USB vacuum pump can be powered by a power bank or main charger. 

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Apply the pump to the air valve, press the button on the end of the pump, and let the air be sucked out. It takes about a minute (but looks more impressive when sped up in the image below!).

Also: How to get into 3D printing without breaking (too many) things

Suck the air out of the bag!

Adrian Kingsley-Hughes/ZDNET

Once the bag is sealed completely, store it in a cool area and away from sunlight. The last thing you’d want is a melted reel of plastic!

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Filament safely bagged!

Adrian Kingsley-Hughes/ZDNET

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HDD specs: Assess SATA vs SAS, sustained data rates and block size

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Hard disk drive (HDD) capacity and price are not the only ways to determine the choice of drive deployed. Other specifications such as connection protocol, energy efficiency and even how drives write data blocks to platters should be taken into account.  

This article is the second of two that provide an overview of the most important HDD specifications. In the first, we looked at mean time to failure (MTTF), annual failure rate (AFR) and unrecoverable error rate (UER).

In this piece, we will look at sustained data rates, Serial ATA (SATA) versus serial-attached SCSI (SAS), connectivity, block write sizes, on-drive security, and methods of increasing drive density such as shingled magnetic recording (SMR) and microwave-assisted magnetic recording (MAMR).

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Outer beats inner: HDD ‘sustained data rate’

In addition to reliability, the most important specs for HDDs are performance and energy consumption.

The highest performance is offered by HDDs that work at 10,500rpm or 15,000rpm, but they have been increasingly displaced by solid-state drives (SSDs). However, 7,200rpm enterprise HDDs still deliver sequential throughput of up to 280MBps and up to 400 input/output operations per second (IOPS). Storage systems with a few dozen of these drives can achieve more than 5GBps and 10,000 IOPS, which is sufficient for many modern applications.

Having said that, the performance of HDDs decreases with their fill level because the outer data tracks on rotating magnetic disks are longer and hold more data than those further in. So, the “sustained data rate” stated by the manufacturers in data sheets always refers to the outer tracks. Further inside, the value can drop to about two-thirds of that.

For companies that want to optimise energy costs, the most important consideration is the modernisation of their HDD infrastructure. With most of the energy used by an HDD needed for spindle rotation, storage capacity and the workload have only a small influence, so a few high-capacity HDDs are more economical than many small ones.

SATA vs SAS and energy costs

Enterprise HDDs are available with SATA or SAS interfaces, with SAS offering important features that SATA lacks, including higher signal strength, end-to-end data protection and dual porting.

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But, usually, HDDs connect via a SATA interface – only 10,000/15,000rpm performance HDDs are available with a SAS interface. Today, a data rate of 6Gbps (called SATA 3.3) is standard, with backward compatibility to previous versions.

SAS is more expensive, however, and has slightly higher power requirements.

From 512 to 4: Different block sizes offer flexibility

In enterprise HDD data sheets, there is usually an indication of block size. This is the size of logical blocks that can be written or read from a hard disk. In the past, this was always 512 bytes, so drives had a native 512-byte sector. Later, larger sectors of 4kb were introduced to write and read larger blocks, which facilitates the management of high-capacity hard disks. In addition, error correction also works more efficiently with larger blocks.

Modern file and operating systems can handle native 4kb sectors on hard disks, but older versions often cannot. So, the 512e format was developed, which uses 4kb sectors but emulates eight 512-byte sectors in each of them. Older file and operating systems can write and read 512-byte blocks as usual.

When writing, however, there may be a loss of speed if the entire 4kb sector is not written. The hard disk must first read the entire 4kb sector to fill one or more of its emulated 512-byte areas and then write the sector back, so an additional read operation is incurred.

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Different block sizes in enterprise HDDs give businesses the flexibility to choose drives that best fit their file and operating systems.

HDD security options: SEDs and SIE

Enterprise HDDs also offer flexible security options, such as self-encrypting drives (SEDs) and sanitise instant erase (SIE). The latter is Toshiba’s variant of widely available instant erase functionality.

SED is hardware-based encryption directly through the hard disk, which is very secure and offloads processing from the system in which the drive is installed. SIE is an option to securely erase all data immediately instead of going through lengthy overwriting processes.

SMR and MAMR for higher storage density

HDD models also differ in relation to recording technology used with conventional magnetic recording (CMR), SMR and MAMR available.

CMR has been in use for years and was formerly called perpendicular magnetic recording (PMR) to distinguish it from a predecessor technology, longitudinal magnetic recording (LMR). PMR has been in use for 15 years, hence why it is now called “conventional” and has reached its limit at 16TB per drive.

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SMR increases storage density by working with overlapping data tracks, and so provides higher recording density. Reading the tracks works as before, but when overwriting an existing track, the data of the overlapping track must first be read and then written back with the new data. This can cause fluctuations in write speed, but caches and caching algorithms are built to handle them.

SMR is primarily used with PC and surveillance HDDs because they do not have to handle sustained high write loads with random accesses. For occasional writes or sequential data streams, such as those delivered by surveillance cameras, SMR is ideal.

Higher-capacity enterprise HDDs, meanwhile, rely on MAMR. A microwave-generating element on the write head helps to focus the magnetic flux so that less magnetic energy is needed for writing. The write head can thus be smaller and write bits more densely.

Currently, MAMR is used in 18TB and 20TB hard drives, and with advancements in this technology, hard drives up to 30TB can be expected in the future.

Since no data needs to be written via overlapping, MAMR is not subject to the restrictions and performance limitations associated with SMR technology. A combination of MAMR and SMR is also technically possible, but not very prevalent. With a combination of these two methods, it will not be long before the industry can benefit from capacities of up to 40TB, but with SMR-typical performance limitations when it comes to random write access.

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Rainer W. Kaese is senior manager for business development in storage products at Toshiba Electronics Europe.

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