How to Use a Multimeter

Use an Analog or Digital Multimeter (DMM) to Diagnose Circuits, Measure Voltage and Current

Photo of Kelly R. Smith   by Kelly R. Smith

A typical digital multimeter and leads
A typical digital multimeter and leads
index sitemap advanced

Ads we feature have been independently selected and reviewed. If you make a purchase using the links included, we may earn a commission, which helps support the site. Thank you for your support.

I’ll be the first to admit it – electrical troubleshooting is not my favorite DIY task. Give me a woodworking project, give me a wall to tape and float; ahh, now you’re looking at a happy camper. But when I do have to jump in there chasing electrons, the first thing I reach for is my digital multimeter.

Digital VS Analog

Multimeters are also called multitesters, which is perhaps a more descriptive name. The digital models might be newer than the analog ones but the concept is the same. Like analog watches and clocks preceded digital ones, the same is true with electrical testing meters. The same might be said of aneroid vs digital barometers.

Is one better than the other? Oh, I don’t know. I’ve been told that the digital is more accurate than its analog cousin. I don’t really care though. I’m not likely to be measuring anything down to the nana-micro-tinyvolt level of granularity. Besides, I really like that little needle flicking around. I guess it reminds me of those old science fiction B movies. But alas, my old analog doesn’t work anymore so I’ve gone digital.



Multimeter Functions

For such a small gadget, the multitester really packs a punch with respect to functionality. Check out some of the things this little gizmo will do for you:

  • Continuity Testing: This is probably the simplest function. No mystery here, it’s just what it sounds like. It checks to see if the electrical current is continuous from point A to point B.
  • Voltage Testing: Again, very straightforward. For example, to test a light switch or an outlet, set the meter to AC (Alternating Current), set it to the voltage closest to what you’re measuring (110 – 120 for an outlet), and put one probe in each slot. Almost all portable electronics use DC (Direct Current). As a simple example, consider an AA battery. Connect the black probe to the meter’s ground or COM port and the red probe to mAVΩ (the 10A port is for large currents (greater than 200mA). Touch the probes with a little pressure against the positive and negative terminals of the AA battery. If you’ve got a new battery, you should see around 1.5V on the display (this battery is brand new, so its voltage is slightly higher than 1.5V).
  • Measuring Resistance: It also tests resistance in a circuit or device. Your instruction manual will go into detail for your specific model, but basically just set the knob to Ohms, plug the black lead into COM jack, the red into the OHM jack. Then put the leads across the device in parallel and read the resistance. Note: If it reads 1 or -1, try testing in a larger range.


  • Measuring Current: Reading current is one of the trickiest and most insightful readings in the world of embedded electronics, such as you might find in a smart Wi-Fi weather station. Why is it tricky? Because you have to measure current in series. Where voltage is measured by poking at VCC and GND (in parallel), to measure current it is necessary to physically interrupt the flow of current and then place your meter in-line.


Using a multimeter is not something that most of us will use every day but having one and knowing how to use it will come in handy time and time again. When choosing one, everyone has his preference, generally speaking, multimeters that have continuity are preferred. Every other feature is just icing on the cake.

Trending Articles


Looking for more great content? Visit our main page or partner sites:

I Can Fix Up My Home

The Green Frugal

Running Across Texas


As Featured On Ezine Articles

I offer article and blog-writing services. Interested? Contact me for a quote!


Did you find this article helpful? Millions of readers rely on information on this blog and our main site to stay informed and find meaningful solutions. Please chip in as little as $3 to keep this site free for all.

 




Visit Kelly’s profile on Pinterest.

About the Author:

Photo of Kelly R. SmithKelly R. Smith is an Air Force veteran and was a commercial carpenter for 20 years before returning to night school at the University of Houston where he earned a Bachelor’s Degree in Computer Science. After working at NASA for a few years, he went on to develop software for the transportation, financial, and energy-trading industries. He has been writing, in one capacity or another, since he could hold a pencil. As a freelance writer now, he specializes in producing articles and blog content for a variety of clients. His personal blog is at Considered Opinions Blog where he muses on many different topics.

ACI 80W LED Garage Light, 3 Adjustable Wings: A Product Review

by Kelly R. Smith

index sitemap advanced
ACI 80W LED garage light with 3 adjustable wings
ACI 80W LED garage light with 3 adjustable wings

This article was updated on 10/08/20.

Effective lighting in the garage has always been an issue for me. The garage is not only home to the washer and dryer, but it is also my woodshop. I saw one of these 3-wing LED lights advertised on the news one morning and thought I’d check on Amazon Prime (if you’ve got the Prime, use it). Sure enough, I got a better deal.

I should mention in passing that that soffit vent I installed that you see on the left hand side of the image above is something that most homeowners don’t think of doing. The garage can get very hot (and in my case, humid). So these vents, in conjunction with the ones I installed on the outside of my garage doors, help to circulate the air when the roof ridge vents draw. This is especially important when you are running a clothes dryer. Just a tip for you.

Features of this Garage Light

  • Screws into a regular light socket: Easy install in minutes, just have the switch off when you screw it in because this light is bright.
  • Adjustable design: The 3 aluminum adjustable LED panels incorporating LED garage ceiling lights can be folded up to a 90 degree angle Point them where they are most effective.
  • Very bright: The 80W, 8000 lumen 6000K white light bulbs really perform wherever they are directed.

Conclusion

I have been using this light fixture for a month now and have no complaints. My work in the shop is much easier than when I was using the fluorescent tube fixtures. And added benefit with this ACI 80W LED garage light fixture is that I was able to eliminate the multi-plug adapter. I recommend this product.



Looking for more great content? Visit our partner sites:

The Green Frugal

Running Across Texas


As Featured On Ezine Articles

I offer article and blog-writing services. Interested? Hire Me!


Did you find this article helpful? Thanks for supporting this free site with a small donation!

 




Visit Kelly’s profile on Pinterest.


About the Author:

Photo of Kelly R. SmithKelly R. Smith is an Air Force veteran and was a commercial carpenter for 20 years before returning to night school at the University of Houston where he earned a Bachelor’s Degree in Computer Science. After working at NASA for a few years, he went on to develop software for the transportation, financial, and energy-trading industries. He has been writing, in one capacity or another, since he could hold a pencil. As a freelance writer now, he specializes in producing articles and blog content for a variety of clients. His personal blog is at I Can Fix Up My Home Blog where he muses on many different topics.

Garmin Forerunner 235 GPS Running Watch Review

by Kelly R. Smith

index sitemap advanced
Garmin Forerunner 235 GPS Sports Watch
Garmin Forerunner 235 GPS Sports Watch

This article was updated on 10/27/20.

A high-quality running or sports watch is just as important than the health supplements I take. The Garmin Forerunner 235 is the third Garmin I’ve worn over the years and miles. My first one was the 310 XT. Nice watch but it was the early days of GPS and the thing was huge and orange. Not something to wear to work as your default timepiece.

My next one was the 220 which was an improvement in size, aesthetics, and functionality. When it bit the dust after years of loyal service I decided to up my game and buy a 235. It was a smart move.

Garmin Forerunner 235 Features

As I said, the 235 was definitely a step up for my running needs. Here are features that stand out for me.

  • Very fast GPS acquisition. Whereas my 220 would average a minute to be GPS ready, the 235 typically takes 5 – 10 seconds. One less frustration in life, eh? Of course, these numbers will vary by location but the ratio should be about the same.
  • Tracks distance, pace, time, and heart rate. The heart rate is picked up from the underside of the watch. No more bulky chest straps!
  • Activity tracking records daily steps, distance, calories, and sleep patterns.
  • When you are out of GPS sight you can still get your metrics. The built-in accelerometer records distance and pace data when you are running on an indoor track or treadmill. I can’t vouch for its accuracy but it feels to be at least within the realm of legit for my purposes.
  • The ability to customize your data fields, and download watch faces, widgets, and applications.
  • For those who spend all day at their desk, the watch has a red “move bar” on the left side of the face that will appear when you haven’t moved recently (see the image at the top of the page). A trip to the coffee bar and a short leg-stretching stroll will make the bar go away. This is a nice touch for those on a weight loss program; all those steps add up. And face it; too much butt-time is bad for your blood circulation among other things.

Computer Syncing and the Garmin Connect Website

Garmin Connect Partial Screenshot
Garmin Connect Partial Screenshot

The watch uses USB to your computer to sych data, download software updates and third-party apps, and charge the watch, which is fast enough to avoid frustration. After synching with Garmin Express (an app on your computer), one click will bring up the Garmin Connect site. The image above is a partial screenshot of the main landing page. The various blocks give an overview of the various data modules and the menu bar on the left allows drilling for down for details at a smaller degree of granularity.

There is no financial charge for displaying and storing your data; it comes with the purchace. The many charts and graphs are very detailed whether it’s sleep patterns, weight (which you enter manually), cumulative mileage on your shoes, and much, much more. Drilling down from the calendar will show workout details along with a detailed map of your course with street names, which is handy for repeating courses or planning a new one.

Third Party Apps

Garmin wisely has engineered their products to integrate easily with third-party applications. You might be surprised at the vast number available. This is a smart business model because the consumer can buy a basic watch which can be personalized to a degree that frankly, exceeds my expectations.

In my case, I added an app that is designed for walking/hiking. I walk my rescue dog, a Black Mouth Cur, 3-5 miles per day. Another one I installed is the 5 Bretlinge Models Classic watch face. It gives the look of a classic analog watch (suitable for work and dinner parties, ahem). I’m just old-school; I like the hands. But under the hood, it offers many other add-on fields. I added cumulative steps and heart rate so I don’t have to keep pressing that button every time I get curious.

All in all I give the Garmin Forerunner 235 GPS watch 4 out of 5 stars. It fits my purposes with possibilities left over. On occasion (twice in 2 years) the time has just gone off and shown something goofy. Going outdoors and syncing to GPS solved that but I can foresee situations where that would be an inconvenience.


Looking for more great content? Visit our main site I Can Fix Up My Home or our partner sites:

The Green Frugal

Running Across Texas


As Featured On Ezine Articles

I offer article and blog-writing services. Interested? Contact me for a quote!


Did you find this article helpful? Thanks for supporting this free site with a small donation! We are reader-funded on a generosity basis, not a paywall.

 




Visit Kelly’s profile on Pinterest.



About the Author:

Photo of Kelly R. SmithKelly R. Smith is an Air Force veteran and was a commercial carpenter for 20 years before returning to night school at the University of Houston where he earned a Bachelor’s Degree in Computer Science. After working at NASA for a few years, he went on to develop software for the transportation, financial, and energy-trading industries. He has been writing, in one capacity or another, since he could hold a pencil. As a freelance writer now, he specializes in producing articles and blog content for a variety of clients. His personal blog is at I Can Fix Up My Home Blog where he muses on many different topics.

Fitbit and the Myth of 10,000 Steps

index sitemap advanced
The Japanese Manpo-Meter Step Counter

Who doesn’t recall the obese prison guard on Orange is the New Black several seasons ago monotonously stepping in place because, “10,000 steps a day will cause weight loss.”

Well, that’s not rocket science. Sure, calories burned vs calories consumed will result in weight loss. But although Fitbit has capitalized on that and put 10,000 out as a magic number, it is still just an arbitrary number. There’s no there, there. On their site they say, ” When you join Fitbit, the default goal we set for each member is the magical number of 10,000 steps a day.”

Where the Fitbit Myth Started

Although 10,000 steps is just a number grabbed out of thin air, it does have a history and it didn’t start with Fitbit. Back in the 1960s, following the Tokyo Olympics, a Japanese company began selling the MANPO-METER which was basically a pedometer. They decided that 10,000 steps per day was just what the doctor ordered for better health.

Of course, there was no doctor; this was pure marketing and it worked like a charm. And after all these years, modern marketers have put lipstick on the pig and the Fitbit phenomenon has been the result. It’s hard to walk down the street and not see a handful of people checking their wrists.

The Good News; it Doesn’t Matter

Alright now that the myth-busting is over let’s get down to science. Yes, for fitness and better health we do need exercise. 10,000 steps is a worthy goal but not all steps are created equal. As a rule of thumb, it has long been bandied about that you have to burn 3,500 calories to lose one pound of fat mass. Don’t put all your confidence in “pounds;” get more accurate by following your scientific BMI metrics.

But some researchers now cast doubts on the calories/pound relationship. Like everything else, there are just too many variables involved. Bottom line, not all steps are created equal.

To make your effort count:

  • Increase your speed when walking; this will increase your heart rate and metabolism.
  • If you are running, do intervals or some form of speedwork once a week.
  • Consider training for a race. This will motivate you and put you in the company of like-minded people.
  • Hit the hills. This will work you harder.
  • Bump up your mileage/time. To ward off hitting a plateau, increase your effort daily.
  • Change your eating habits. Eat quality food, not junk. Small snacks like nuts are good to keep your blood sugar stable.

So, Should You Invest in a Fitbit?

Absolutely! Most people need some sort of device to see where they are in their training. You aren’t limited to any one type of device.  For example, I use a Garmin. It gives me elapsed time, distance, pace, elevation, cumulative mileage on my shoes so I know when to change them, and more. As a bonus it’s nice enough to be worn as an everyday watch. It also downloads my data to the computer.

It is also quite possible to get your phone to do all this but cell phones don’t always get along with sweat and rain so there will be times when that is not a good option. Today there are any number of training and weight loss apps available to motivate you and keep you on track.



So go ahead and start with Fitbit’s mythical 10,000 steps as as baseline. It is as good as any other number. And remember, there is nowhere to go but up.



Looking for more great content? Visit our main site I Can Fix Up My Home or our partner sites:

The Green Frugal

Running Across Texas


As Featured On Ezine Articles

I offer article and blog-writing services. Interested? Contact me for a quote!



Did you find this article helpful? Millions of readers rely on information on this blog and our main site to stay informed and find meaningful solutions. Please chip in as little as $3 to keep this site free for all.

 




Visit Kelly’s profile on Pinterest.



About the Author:

Photo of Kelly R. SmithKelly R. Smith is an Air Force veteran and was a commercial carpenter for 20 years before returning to night school at the University of Houston where he earned a Bachelor’s Degree in Computer Science. After working at NASA for a few years, he went on to develop software for the transportation, financial, and energy-trading industries. He has been writing, in one capacity or another, since he could hold a pencil. As a freelance writer now, he specializes in producing articles and blog content for a variety of clients. His personal blog is at I Can Fix Up My Home Blog where he muses on many different topics.

10 Habits of Highly-Successful Runners

by Kelly R. Smith

A healthy runner is a happy runner.
A healthy runner is a happy runner.
index sitemap advanced

Article edited on 10/28/18

By definition, we runners are creatures of habit. We simply don’t feel right if we miss a workout and sometimes push harder on the next one to make amends. This makes it a healthy habit in our eyes and occasionally just a bit on the kooky side in the eyes of our sedentary counterparts.

We are also goal-setters. This is easy for beginning runners when the opportunities are as open and unlimited as the blue west Texas sky. The first 5K, the first 10K and so it goes until we have marked off our bucket list so many pounds lost, that first marathon or ultramarathon.

But what happens after that? Do we crater? Hopefully not. Although I must admit that I don’t see as many of the old crew at the races as I used to. I don’t do as many as I used to anymore either; I just focus on the Texas Bridge Series.



But I do keep running. My goal now is just to keep running until I eventually lay down for that long, long dirt sleep, as long as the COVID-19 pandemic doesn’t claim me. Now that is a worthy goal. With that in mind, lets look at some the 10 habits of successful runners. As I define success, it’s keepin’ on keepin’ on; with 5 ultras under my belt more distance isn’t the answer it once was. For you it might be still climbing that ladder of goals.

Do Your Strength Training. Many runners neglect the weight training and this is a mistake. Building and maintaining lean muscle mass balances us out and reduces the prospect of injury. There is a good reason that those in the know continually stress the importance of maintaining a strong core. Choose exercises that work the upper body, core and lower body. Shoot for 3 times a week. There is really no reason for a gym membership unless you need the swimming pool. Resistance bands are very economical and versatile and will even fit in your suitcase if you spend time on the road.

Chow Down on More Vegetables. You don’t have to adopt Michelle Obama’s school menu, but try to fit more organic veggies into your lunch and dinner meals. The point is that high-quality carbohydrates lend power to your workouts, and their antioxidants help keep the potentially damaging free radicals at bay.  Myself, I’m nuts about salad. Try to select vegetables of different colors since that virtually guarantees that you will get a broad range of nutrients and avoid nutrient deficiency. And don’t forget to add some cheese; calcium and protein are good things. That being said, don’t skimp on high-quality protein; it boosts metabolism and repairs muscle.

Make Running Your First Activity of the Day. After your coffee of course. You afternoon runners know the drill; the later it is in the day, the more things arise to threaten your workout. Plus the fact that it gives you altogether too much time to talk yourself out of it. And isn’t it worth the early wake-up call to already be endorphin-saturated when you are faced with the prospect of a boring meeting at the office? Enjoying another cup o’ joe? When you set your alarm before bed, be sure to allow enough time for your warm-up routine. Be sure to set out all your essentials the night before so you can plug ‘n play. That means shorts, shoes, socks, water bottle, etc.

Get in Some Cross-Training. As good as running is for us, it is very stressful on the body. Some swimming, spinning and time on the rowing machine will maintain your level of fitness while at the same time giving your joints a break. With that in mind, a couple of good times to work cross-training into your schedule is on the day before or the day after a hard run. I’ve found that some slow yet long lap swimming is just the thing to elevate my heart rate while also getting a great all-over stretch in.

Dump the Gadgets Once in a While. We have become obsessed with cell phones, GPS, earbuds blocking out the world and God knows what else. It will do your soul good to leave all that junk behind every now and again when you hit the road or trails; get out of your box. Enjoy the sights. Listen to your breathing. Smell stuff. Do something nice and redeeming that doesn’t reek of “me.” I run early in the morning and stop to pick up earthworms that have slithered up onto the sidewalk and lost their bearings. I toss them back into the deep grass before the ants can attack them like so many Lilliputians on Gulliver. Weird? Hell yeah, but you wouldn’t believe my karma bank account. Besides, all this will remind you of why you run in the first place.



Make Your Weekly Long Run a High-Quality One. If you are not already doing a weekly long run now is the time to start. They are not just to be used as part of a marathon program. The physical benefits are many including beneficial enzyme changes in you legs, new capillary growth, and musculoskeletal strengthening. Remember to follow the 10% rule to avoid injury—don’t bump up the distance more than 10% from one week to the next. If Saturday morning is your long run, Friday is a good candidate for a rest day. You might want to take your music with you; it can be lonely out there.

Be Your Own Cook. Try to say goodbye to restaurants, fast food places, and greasy spoons, at least for dinner and breakfast. Problem is, you can’t control the ingredients or portions when someone else is doing the culinary duty. Case in point: I tend to have high blood pressure and don’t need all the salt that they seem to administer with a front end loader. Can’t cook? Take a cooking class or just practice, practice, practice. Controlling quality an portions is especially important if you are on an intermittent fasting regimen.

Warm-up before Your Run and Stretch Afterwards. Many runners neglect these two steps and that’s just wrong. Warming up will loosen the muscles that you need limber in order to hit your stride. You might not feel like you need to stretch afterwards (you are already loose as a goose) but during cooling down your muscles will begin to contract rapidly. Static stretching, not ballistic, can prolong that action and reduce soreness. A foam roller can work wonders. Focus on your calves, hip flexors and hamstrings.

Slather on that Sunscreen. Running for hours and hours is a blessing and a curse as far as the sun is concerned. On the one hand, you don’t have to worry about a vitamin D deficiency. On the other hand, your chances of developing skin cancer go way, way up. As a general population, 1 in 5 Americans will develop skin cancer. Ouch. And that estimate also takes those milky-white goth folks into account. Try to use a sports sunscreen; it will not sweat off as easily.

Finally, Get Plenty of Sleep. Sleep is essential for all of us but it is especially critical for runners because the body undergoes some major repair action when we check into nod-land. In fact people that are taking statin medications to control cholesterol are advised to take it only at bedtime because that is when the blood really gets cleaned up.  Cutting back on sleep can cut the amount of glycogen that your body will store for fuel and may result in weight gain. And besides all those interesting facts, the dreams are just fun, right? If you want to boost the enjoyment level, work on developing your lucid dreaming abilities.

Hopefully, this article provided a bit of inspiration. If you need to work on one or more of these 10 habits of highly-successful runners, now is the time. Start working them in one at a time and chart your results. And have fun.


Looking for more great content? Visit our main site I Can Fix Up My Home or our partner sites:

The Green Frugal

Running Across Texas


As Featured On Ezine Articles

I offer article and blog-writing services. Interested? Contact me for a quote!


Visit Kelly’s profile on Pinterest.

About the Author:

Photo of Kelly R. SmithKelly R. Smith is an Air Force veteran and was a commercial carpenter for 20 years before returning to night school at the University of Houston where he earned a Bachelor’s Degree in Computer Science. After working at NASA for a few years, he went on to develop software for the transportation, financial, and energy-trading industries. He has been writing, in one capacity or another, since he could hold a pencil. As a freelance writer now, he specializes in producing articles and blog content for a variety of clients. His personal blog is at I Can Fix Up My Home Blog where he muses on many different topics.