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I want to grow my subscriber base. To aid in this, I’m announcing a Holiday Giveaway Challenge. I’ll be giving away a bundle of inscribed copies of both of my tips books (Vol. 1, Vol. 2) and three of my favorite everyday tools: The Williams ratcheting screwdriver, the Canary cardboard cutter, and a plastic razor blade. To be eligible for the drawing, you need to convince three people to sign up for my newsletter (and then email me their names). If you sign up 5 (or more), you get two entries in the drawing. Contest ends Midnight, Dec. 11. Sorry, but this contest is US-only!
Force Conversion Calculators
On Digi-Key’s website, they have a set of calculators for converting between various units of physical force (newtons, gram-force, metric ton-force, and others). So, the next time you need to covert between Sthène and Poundal…
Torture-Testing Bench Vises
Bench vises are one of those common tools where people rave about the cheap ones available at Harbor Freight. I’ve always wondered how true this was. So, seeing this Project Farm video, I was anxious to know how the Freight would fare. Todd tested the following brands: Heuer, Ridgid, Yost, Wilton, Baileigh, Irwin, Forward, Central Forge, Olympia, Myoyay. Vises were tested for clamp load, durability from impact, anvil durability, and clamp load failure point. This is one of the few Project Farm videos I’ve seen where Todd pushed the tool to complete failure.
Sure enough, the $69 (at time of testing) Harbor Freight vise (Central Forge) performed amazingly well. Not surprisingly, the $500 (at time of testing) Heuer was best overall. Now that I see this testing, I’m definitely going to grab a Harbor Freight vise. When we moved to California last year, I left my two vises on the east coast and I’ve been missing having one (beyond my Dremel hobby vise).
The Basics of Photochemical Machining for Precise Parts
In this Applied Science video, Ben provides a nice and thorough introduction to photoetching small, precise metal parts, aka photochemical machining. The process is involved, not really for beginners, and this is a work-in-progress video. But, because there aren’t any vendors out there (that I’m aware of) providing this service for small-batch photochemical machining, this video is a way in if you need to consider creating such small, precision metal parts on your own.
Bringing a Rusted Cast Iron Skillet Back from the Dead
Over on Boing Boing, Mark Frauenfelder shared this video on one of the many processes (basically they’re all the same with some variation) for reviving a completely rusty cast iron skillet. Years ago, I decided to revive the 3 very rusty skillets I had in the bottom of my pots and pans cabinet. I watched several videos and followed a similar process. It was so satisfying to bring these decades-old kitchen tools back to life.
The Existential Pleasures of Restoration and Repair
Good as new!
Speaking of kitchen tools, my wife’s handheld mixer died recently. I heard it seize up as she was making something downstairs. We could’ve just bought a new one (this thing is ancient), but I really wanted to fix it, especially as she told me of its lineage. This is the first and only mixer she’s ever had. Every holiday feast was made with this mixer. She raised her kids on this mixer. Her sister gave it to her. As I like to say, tools always come with stories, and this one has great stories. I took it to my workbench, took it apart, and had a look. I quickly discover that the wormgear that transfers the motor’s spin to the beater gears was frozen. Some WD-40 and and few gentle twists with the needle nose and it was working again. Easy! The beater ejector had long ago broken, so I fixed that, too. The mixer was filled with decades of dust, batter gunk, and thickened oil. I took everything apart, cleaned it, inside and out, and put it all back together. This process was an act of love, for my wife, and also for the stories this mixer tells. And now, will continue to tell.
Noteable Quotables
“I always work at the edge of what I understand.” -Musician, artist, Brian Eno
“There is nothing worse than a brilliant beginning.” –Pablo Picasso
Shop Talk
Paul Cryan writes:
Watching the Stumpy Nubs vid on oscillating tools, I thought about getting mine out and seeing if it could solve some of my “learning issues” with 3D printing. Not only did my Dremel Multi-Max MM40 fit with a Diablo HCS flexible adhesive scraping blade do beautiful work cutting away support material from PLA prints, but I’m pretty sure it will work to get those stubborn PETG prints to release from the PEI print surfaces I’ve got on all my printers. To my surprise, at a shallow angle of attack (e.g., < ~30 degrees) the oscillating adhesive blade doesn’t seem harmful to the print surface, despite its keen front edge, and it wiggles under really stuck PETG. As pointed out in the Stumpy Nubs video, the oscillating blade can be grabbed without danger. I think it might become my new favorite way of releasing sticky 3D prints so that I don’t damage the surfaces of my printers.
***
Reader Kristian Reinhart (who was the winner of last year’s holiday tips challenge) sent a batch of new tips. Here are a few:
* The quickest non-chemical way I’ve found to clean up the surface of 3D prints (especially flats or edges on FDM prints) is using a snap-off blade and scraping over the surface. Much less hassle than sandpaper. Card scrapers, especially small ones, also work great, and depending on their shape and the shape of the print, shape do so far better than the snap-off blades, but they’re not as ubiquitously available and require maintenance.
* When lending tools or other things, I take a picture and edit it to write down the name of the recipient, then I store those pictures in a separate folder on my phone. That way, I always know exactly what I lent out to whom, and from the date of the picture, when.
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A cool tool can be any book, gadget, software, video, map, hardware, material, or website that is tried and true. All reviews on this site are written by readers who have actually used the tool and others like it. Items can be either old or new as long as they are wonderful. We post things we like and ignore the rest. Suggestions for tools much better than what is recommended here are always wanted.
Napping is a evolutionarily habit that still works wonders today. I can get by with several hours less sleep per night by adding a 20-minute nap in the afternoon. But I work at home where napping is easily done. The point of this book is to persuade you that the benefits of napping, scientifically derived, are so great you should do everything you can to make napping a habit whatever your schedule. As this concise guide makes clear the benefits to nappers are significant: smarter, more productive, healthier. For those who have tried napping without success, this book offers several different methods to try. It is hard to imagine the siesta returning in full force in the workplace, but it should be resurrected in some fashion. Start here. This is the best practical book on naps yet. — KK
It's free, it's nontoxic and it has no dangerous side effects. Hard to believe, with these powerful selling points, that people have to be convinced to nap. But alas, for way too long, napping has been given a bad rap.
I'm often asked if a nap during the day will interfere with nocturnal sleep. The answer is a definite no. Unfortunately, many information sources on sleep hygiene encourage people to avoid napping if they're having trouble sleeping at night. Not only is there not a shred of evidence to support this advice, but much of the data coming out of sleep research demonstrates quite the opposite. In studies across all age ranges, nocturnal sleep duration has been proven to be unaffected by midday napping. As a matter of fact, studies indicate that in a number of cases napping actually improves the ability to sleep at night.
As a rule of thumb, you can count on naps earlier in the day to be richer in REM, while late afternoon naps tend to be higher in SWS. If you take particular interest in your dreams, waking up during or right after a heavy REM episode will allow you the greatest recall of your dream imagery. If you feel like one of "the walking tired," a heavy SWS does will take care of that.
It bears repeating: There's no such thing as a bad nap. Any time you spend in midday sleep will reduce the effects of fatigue and bestow benefits. But our nap needs differ across populations and will change over the course of our lives. A mother's requirement is not the same as that of her three-year-old toddler. The sleep profile of a middle-aged football coach had little in common with that of a teenage beauty contestant.
"Who's got time to nap?" is a common complaint among non-nappers. The short answer is: just about everyone. if you spend 20 minutes or more at Starbucks getting an afternoon mocha latte, couldn't you just stay where you are and take a nap instead? So, before you conclude that napping doesn't fit into your busy life, take out your day planner and examine your schedule. By carefully reviewing the activities of your day and the time it takes to do them, you can assess which time expenditures are unnecessary and where a nap can be substituted. How long is your lunch? A paralegal with an hour lunch break reports that she can eat in half an hour and keep the second half for her nap. Or do what I do and pencil in 20 to 40 minutes as soon as your get home for a transition nap between work and leisure.Once you've carved out these precious minutes, you need to make this nap time a regular feature of your day. Just as we've developed a detailed trail of cues for our minds and bodies to recognize that it's time for nighttime sleep, we need to fashion a similar set of cues that will indicate that it's nap time. Consistent scheduling allows the body to associate that hour with the nap and all other concerns to more easily fade away.
"If I nap I'm being lazy." Some of the most hardworking figures in history--national leaders, scientists, CEOs, movie stars--have used napping as a tool to get more out of each day. As demonstrated by the latest brain imaging technology, your mind is still at work even if your body is at rest. Replace with: "Napping makes me more productive." "I'm too busy to nap." Just look around your office at 3 p.m. More than likely, instead of a hive of industrious activity, you'll see a bunch of bleary-eyed workers checking and rechecking their e-mail. As the great napper Winston Churchill said, "Don't think you will be doing less work because you sleep during the day. You will be able to accomplish more. You get two days in one… well, at least one and half." The latest scientific research has proven him correct. Replace with: "I'm so busy, I need to nap." "I haven't done enough to deserve a nap." Do you deserve to eat? To breathe? No natural function--including napping!--should be regarded as a privilege. Stop cheating yourself. Replace with: "I'm exercising my inalienable right to nap." "I can't get anything out of a 20-minute nap, so why bother?" You can reap benefits in as little as five minutes. Naps under 20 minutes can increase alertness, improve physical dexterity, boost stamina and lower stress. Post-lunch naps of 15 minutes have been shown in university studies to increase alertness and performance. Replace with: "In less than 20 minutes, I will restore my alertness for the rest of the day."
You know nothing about nearly a third of your life. Sure, you think you have some sense of how you sleep, but you really don’t. We’re notoriously inaccurate in estimating how long it takes us to fall asleep, how long we’re awake in the middle of the night, how long we dream and how much deep sleep we get. And the total hours you sleep are only one factor of many in determining the quality of that sleep and the restorative effect it will have on you. Even worse, if you want to improve the quality of your sleep, all you’ve got to go on is general advice, while the one thing we know about sleep is that we’re all different.
What you need is data. That’s what Zeo provides. It’s a clock-radio-sized device that sits on your bedside table, with a comfortable wireless headband that you wear while you sleep. The headband measures electrical signals from your brain and can distinguish between four states: awake, light sleep, REM sleep and deep sleep. The base station records all this, and displays all the data in easy to understand charts, as well as recording it on a SD card that you can plug into a computer to upload to a very good website for tracking and analysis.
(It’s also a great alarm clock, which can wake you at the time when you’re most ready to wake, which may be some minutes before the set time)
I was given a Zeo when it first came out last year, and I’m hooked. I knew I was a poor sleeper who is plagued by too-vivid dreams, but here’s what I found out with Zeo: 1) I get very little deep sleep (often less than 10%), which is the most restorative type. My wife, meanwhile, usually gets more than 25% deep sleep over the same period. 2) When I think I’m tossing and turning all night, I’m usually not. The wake periods are typically short, and I am actually asleep between them. 3) There are simple things I can do to improve my sleep, even if I’m not sleeping any more hours.
To that last point, Zeo is all about running experiments on yourself. Take a couple weeks of baseline data to measure day-of-week cyclicality, and then start changing things. For me, the difference between one glass of wine and two a night is an average of five points of “ZQ” score (I average around 80). Cutting off screens (email, web, even reading on the iPad) a half-hour before bed and turning to a paper book also adds about five points. I’d hoped that exercise would add to my score, but it didn’t. Three milligrams of melatonin before bed has a small but positive impact, which may well just be the placebo effect. 11:30 is better for me than 12:00, but 11:00 is no better than 11:30. And so on.
If you’d like better sleep and want to be smart about how you go about it, Zeo is the perfect tool. And even if you don’t have one, subscribe to the Zeo blog, which is full of smart data- and science-driven advice and discussion about sleep quality and how to improve it. — Chris Anderson
Quantifying mental ability
Mind Metrics
One of the self-tracking projects that I always wanted to do was to determine the impact of sleep, diet and exercise regimen on my mental and cognitive abilities. I needed an app to measure my cognitive or mental skills/abilities — rather than training or improving them. I also wanted measurement methods to be as close to scientific as possible. And of course the tests should take as little time as possible (preferably under 5 min), and run off portable devices. I settled on Mind Metrics — it’s an awesome phone app that lets me measure alertness, higher cognitive abilities such as attention and memory, and their combination.
For instance, in the alertness test you are asked to tap the sun as soon as it appears in the same part of the screen randomly every few seconds. You can control the number of trials and timing for both tests. After completing a preset number of trials, you get both average reaction time and average attention/memory score. You can see all your current and previous scores on the screen, and also e-mail them to yourself in comma separated format.
I’ve been using Mind Metrics to measure mental alertness in a couple of experiments, including finding the optimal time to go to bed (my finding was that going to bed between 11 and 11:15 leads to higher alertness next morning and better sleep), and validating orthostatic heart rate test (difference between standing and resting heart rate right after waking up reasonably well predicts mental and physical performance later in the day). I am currently using Mind Metrics to track my cognitive well-being on a daily basis. — Konstantin Augemberg
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Good as new!
