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Comparing Circular Saw Blades
In this Project Farm video, Todd tests 15 different circular saw blades to find out which ones are the best. He tested blades for performance in ripping 2×4 lumber (before and after striking nails) and compared for performance while cutting through oak and ripping an 8’ pressure-treated 4×4. Bottom line? The Makita blade ($10) was best overall. The Spyder also performed surprisingly well for its $5 price tag (at time of testing), although that price is currently over $12 each, so look for it on sale. Doing a web search, I see it’s available at some e-tailers for under $7.
Cutlist Optimizer
Speaking of cutting things. If you have a woodworking project that involves a fairly complicated cut list, there is a free app called Cutlist Optimizer. It allows you to both organize your cut list to better keep track of all of your pieces and allows you to optimize the parts you can get from your sheet goods.
How to Calculate 555 Timer Frequency and Duration
Ah, the venerable 555 chip. One of the most useful and popular ICs in electronics history. Invented in 1971, released in 72, it remains a go-to solution for a myriad of timer, delay, pulse, and oscillation applications. In this Digi-Key video, they cover the steps for calculating the necessary resistor and capacitor values needed to achieve the frequency and signal duration that you’re after in your project.
The Power of Great Reference Books and Knowing the Names of Things
As both a maker and a word nerd (I edited Wired’s “Jargon Watch” column for 13 years), I’ve always tried to impress upon people the power in knowing what something is called. Knowing the proper name for something allows you to look it up, learn about it, track it down (if it’s a tangible object). In this Adam Savage video, he harps on the same thing. He does so while extolling the virtues of a book he recently discovered and loves, the Backstage Handbook. This visual technical reference is for stagecraft, but most of its contents–divided into tools, hardware, materials, shop math, electrics, and architecture–can be applied to all manner of making. You you get to learn the proper names for all of the tools, hardware, and materials it covers. Magic!
TOYS! StylusReach Flexible Flashlight
Cool Tools has launched a new newsletter called Tools for Possibilities. Every week, subscribers get sent a page from the CT book: Cool Tools: A Catalog of Possibilities. I was tickled to see that the first page I was sent had a review that I wrote on the StylusReach flashlight. The Cool Tools catalog was released in 2013. Nine years later and I still have, use, and love this flashlight. Good tools do that.
Newsletter reader Paco Hidalgo sent this in response to the piece in the last issue on water and baking soda as a CA glue accelerator.
“I first tried the Zip Kicker CA accelerator and found its smell very disagreeable, nauseating, and the spray bottle made it very difficult to apply just a small drop. I later leaned that cyanoacrylate glues “set” (polymerize) by the mere presence of trace amounts of water vapor in the atmosphere. This infographic explains.
“So, I concluded that if that is the case, then liquid water would certainly accelerate the polymerization. I found that just a drop of water from a toothpick or needle onto a blob of the glue does indeed accelerate the setting process. I never heard of using baking soda but that would add a foreign material to the bond. Why do that? [See comment below] There would be no reason to mix baking soda with water since water alone does a good job.
“BTW: A ‘secret’ that I learned from the guy at the counter of a mall hobby shop, is that CA glues will keep indefinitely in the freezer. I think the dry environment prevents the glue from polymerizing. The manufacturers don’t want you to know that so they tell you not to freeze their glues. I keep partial bottles of different types of CA glue, including LOCTITE, sealed inside a ziploc bag in the freezer that are at least 10 years old. I can take a bottle and use it immediately without waiting for it to come to room temp. It is liquid and works just as fast. I wipe the tip with acetone after each use and keep a common pin in the narrow opening so it doesn’t clog.
“I keep all my solvent glues, including Lexel, E6000, and Goop in the freezer too, with the same result. I think the cold environment keeps the solvent from evaporating and escaping from the imperfect seal that normally shortens the shelf life. I keep epoxy glues in the refrigerator. This is enough to prevent them from self-polymerizing.”
[Just to clarify: Baking soda is commonly used by itself as an accelerator, especially in the hobby/modeling communities. Besides being an accelerator, it adds more structure to the join. Large amounts of baking soda can be added to CA glue to create a very hard material. This soda and CA combo as a structural material is common among luthiers repairing bridges and fret boards. It can be sanded, drilled, etc.]
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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.
I’ve been wearing a Fitbit since late 2009 and overall I highly recommend it.
The Fitbit is expensive for a pedometer ($99), but in return you get wireless syncing of your steps to your computer and to fitbit.com. Plus you can add friends as “Fitbit buddies” to compare how many steps everyone took each week. I’m currently in a year-long competition with my brother-in-law to see who can take more steps. Inspired by the Fitbit, I will often do 1:1 meetings as a “walk and talk” around the block instead of sitting in a room. I take the stairs at work instead of the elevator. I park my car a couple hundred yards from work instead of close to the building. So far since later 2009, I’ve taken 7,715,383 steps. That’s 3000+ miles towards better health!
What’s not so good? The Fitbit costs a bit much, although I think it’s worth it.
The other (mild) issues I have with the Fitbit are that:
Water can short it out. Don’t go swimming with it on, and attach it somewhere that won’t get 100% drenched in sweat.
Overall, I think wearing a pedometer (Fitbit or otherwise) is one of the easiest/best things you can do for your health. This tool is highly recommended.— Matt Cutts
I use a Fitbit, too. The wireless syncing means that you don’t need to think about it. The hardest part for me is to remember to move the device if I change my pants. The simplicity of the website, and of the user interface on the object, entice you to use it, and to pay attention to the results. It is a small thing that works well and a habit that is very sustainable over the years. — KK
I’ve been using my Withings WiFi-enabled scale since 5 Dec 2009, at which point I weighed 246.9 lbs. Today, I weigh 183.5 lbs, and this scale helped me reach my goal. It shows weight, percentage or lbs of body fat, and BMI. Because it’s WiFi-enabled, the readings are picked up and displayed graphically on my Web page (password protected) at their site with the option to share it with other web-based weight loss sites. Moreover, I can use the data locally by downloading the readings in a format suitable for a spreadsheet.
I weigh daily, and the graph has greatly helped in my weight-loss efforts. Now I can easily see the trend, which helps manage it. I’ve had a series of scales that measure both weight and percentage body fat, including a couple by Tanita. As part of my weight loss effort, I did have some professionally administered body-fat measurements, and the Withings readings were consistent with that, within the limits of accuracy with respect to one’s daily weight fluctuations. If you have multiple people using the scale, it’s easy to set up multiple accounts (it has a maximum of 8 users). —Michael Ham
High-capacity measurer
Digital Freight Scale I’m a big dude so most scales don’t even cover my weight. Consequently I had to think different to get a decent scale. I found this digital postage scale. It reads up to 400lbs in half pound increments, has a remote, mountable readout auto tare (useful when weighing the dog). It isn’t particularly pretty but being in the top percentile in weight and height has certain drawbacks and requires special tools. — Bryan Covington
A physicians’ balance beam scale is consistently accurate. We’ve had one now for at least 25 years; its accuracy has remained constant through many moves, changes in humidity, and so forth. Measurement is in 1/4 pounds, which is good enough. There is a readjustment knob if you think there is an error when changing the scale’s placement. If only my weight and height had remained so constant….— Martha Robinson
If you want consistency and accuracy in a body scale, I strongly suggest an old-fashioned balance beam scale. Even a cheap one (<$200) will do a better job than most expensive electronic scales. Also, they are kind of fun to use, they have an eye level display, and the batteries never run out. — Danny Hillis
I’ve been using the BodyMedia FIT armband for the past 3 months and it is the only diet and exercise system that I’ve found that really works. The system works through the use of an armband that you wear on your left arm throughout the day. As you go about your regular routine the armband measures your caloric burn. The armband uses four sensors to track over 9,000 variables from heat to sweat to steps to calories burned every minute of every day.
You can track your daily burn and steps taken through an optional display, but the real power is in syncing the armband to the BodyMedia web site which allows you to see charts of calories burned per minute, steps taken, exercise levels, sleep cycles, etc. You can also track your weight measurements in the tool. The great thing about the online tools is that it lets you enter your daily caloric intake (just search for a food and add it to a meal), and compares your incoming calories to outgoing calories. By entering your calories on a daily basis you can ensure a realistic caloric deficit which is guaranteed to help you lose weight safely. It’s very helpful for making sure you don’t starve yourself by eating too little, or conversely, that you don’t go crazy and eat too much.
Since I started using the armband I’ve dropped 20 pounds that I’ve managed to keep off with almost no trouble. It’s become pretty simple for me. I can eat a healthy but normal breakfast and lunch, then I check my calorie burn before dinner and make sure to eat the appropriate amount to ensure I maintain my target calorie deficit.
What I love about this tool is that it eliminates estimation. Everyone has different basal metabolic rates depending on what they do during the day. Whereas most diet systems target a fixed number of daily calories, those fixed amounts could mean anywhere from a 500-2500 calorie deficit depending on the person. Anyone who’s dieted knows that when you get into high calorie deficits you’re body stops losing and you go into the so called starvation mode where your body actually holds onto the weight. With this that never happens. If I have a lazy day at work and am on target to burn 3200 calories then I know I can eat 2200 and maintain my 1000 calorie deficit. But say, I go for a long run on the weekend and do some yard work I could get up to 5500 calories burned. If I stuck with a 2200 calorie diet, my body (and my willpower) would rebel. However with BodyMedia, I know that on those 5500 calorie days I can eat 2000 more calories and still be on target for weight loss.
Long story short – I absolutely love this system. — Marc Ryan
Once a week we’ll send out a page from Cool Tools: A Catalog of Possibilities. The tools might be outdated or obsolete, and the links to them may or may not work. We present these vintage recommendations as is because the possibilities they inspire are new. Sign up here to get Tools for Possibilities a week early in your inbox.
