| How to Use a Digital Multimeter Posted: 06 May 2021 01:00 AM PDT A digital multimeter is a super handy tool for measuring things like voltage, resistance, continuity, and current in various electrical circuits. However, it can be a bit daunting to use one at first because of all the different settings! Once you get the hang of it, though, using a digital multimeter is super easy and safe. We've put together answers to some of the most common questions people have about using their multimeters to measure electricity. [Edit]What do the settings on a multimeter mean? - The voltage setting is for measuring AC and DC voltage. AC, or alternating current, voltage is used to measure things you might find around the house, like wall sockets, microwaves, or pumps. DC, or direct current, voltage is mostly used to measure batteries.[1]
- Both of these types of voltage are measured very similarly with only slight differences in how to get your reading.
- The resistance setting is for measuring resistors after disconnecting them. To measure resistance, the multimeter sends a small amount of current to the object you're testing and gives you its resistance in ohms. Make sure you disconnect the thing you're measuring so it's not linked to a power source.[2]
- If you don't turn off the power, you could damage your multimeter.
- Resistors are passive two-terminal electrical components used to limit the amount of current in certain parts of circuits. You can find them in all types of electrical circuits. They usually look like little cylindrical or oblong shapes with wires coming out of each end and have colorful stripes around their bodies.
- The continuity option is for testing whether wires are still working or not. If you're not sure whether a certain cord or wire still has a good connection, you can test this by measuring its continuity. This tests the connection between two points in a circuit.[3]
- Continuity is the presence of a complete path of electrical flow. For example, a brand new electrical wire should have full continuity. However, if it is frayed or broken, it doesn't have continuity because the electricity cannot flow through it.
- This is a good way to see if cables are broken internally or not.
- The amps setting is for finding the current of electrical circuits. Amps, short for ampere, is the unit of electrical current. This measurement tells you how much electricity is flowing through a given electrical circuit.[4]
- For example, measure the amperage of something to determine whether that object is pulling too much energy and draining your electricity.
- An electrical circuit is any path for transmitting electricity. For instance, the wall sockets in your home are electrical circuits.
[Edit]How do you check voltage with a multimeter? - Plug the test leads into the COM and V terminals. Always plug the black test lead into the terminal that's labeled "COM" for "Common." Always plug the red test lead into the terminal labeled "V" for "Voltage," since this is what you're testing.[5]
- Both AC and DC voltage are measured using the test leads in this setting.
- Move the dial to V~ if you're measuring AC voltage. Use the AC voltage setting if you're measuring voltage in a wall socket, a washer or dryer, a TV, or any other home electrical system. Look for the V with a wave sign next to it and move your dial to this area.
- Switch the dial to V⎓ to measure DC voltage. DC voltage measures batteries. DC voltage is represented by a V with a horizontal line next to it and a dotted line under the horizontal one. Look for the DC voltage sign on your multimeter and move the dial to this section.
- Set the multimeter's voltage range to its highest. That way, if you accidentally measure AC voltage on the DC setting, or vice versa, it doesn't harm the multimeter.
- Place the probes on the positive and negative leads to measure voltage. Put the tip of the black probe on the negative lead of a battery or in the negative side of a wall socket. Put the red probe on the positive end of a battery or in the positive side of a wall socket.[6]
- If you're not sure which end is positive and which is negative, try putting a probe on each end and seeing what the multimeter says. If it's showing a negative number, your positive and negative are switched.
- To avoid getting shocked, keep your fingers away from the tips of the probes when you're putting them near a wall socket.
- Keep the probes from coming into contact with one another or you can generate a short circuit and possibly cause an electrical fire.
- Look at the digital multimeter reading to see the voltage. Once your probes are connected to the positive and negative leads, you'll get a reading on the multimeter telling you the voltage of what you're testing. Look at the digital screen to find the reading and take note of it if desired.[7]
- Looking at your reading tells you whether or not the voltage you're measuring is average or not. For example, if you measure the wall socket and the multimeter reads 100V, this is below the average of 120V, letting you know this wall socket's voltage is low.
- If you're checking the voltage of a new 12V battery, the reading should be right around 12V. If it is lower or there is no reading at all, the battery is low or dead.
[Edit]How do you measure resistance with a multimeter? - Insert the black test lead in COM and the red test lead in the Ω terminal. Stick the black test lead's plug into the COM terminal. The red test lead's plug goes into the terminal labeled Ω, which is the symbol for ohms, the unit that resistance is measured in.[8]
- The Ω sign is likely linked with the V sign, meaning the terminal to measure ohms and voltage is the same.
- Set the dial to a number on the multimeter's resistance scale. Look for the Ω symbol on your multimeter's dial area. Twist the dial to a number close to the expected resistance in this section. If you aren't sure what the expected resistance is, set it to a number at the top of the scale. You can adjust it as you measure until you get a precise reading.[9]
- Resistance is the opposition to flow of current in an electrical circuit. Conductive materials like metal have low resistance, while non-conductive materials like wood have high resistance.
- For example, if you're measuring the resistance of a wire, set the dial to just above 0. You can look up the expected resistance for different electrical components online or in an owner's manual.
- The Ω values on your multimeter can range from 200 to 2 million ohms, depending on the specific type of multimeter you have.
- Place the probes on the resistor to test the amount of resistance. Touch the tips of the probes onto each end of the resistor. Look at the multimeter's digital screen to see the reading, which tells you the amount of resistance in ohms.[10]
- If your multimeter is just reading "1," you might need to increase the value of ohms measured by turning the dial so your reading is more specific.
- Write down the reading if needed, noting the correct unit.
[Edit]How do you check continuity with a multimeter? - Plug the probe wires into the multimeter and set the dial to continuity. Put the red plug into the terminal labeled as V, Ω, or with the sign for continuity, which looks like a sound wave. Insert the black plug into the COM terminal. Turn the dial to the picture that looks like a sound wave.[11]
- A sound wave looks like a series of increasingly larger ")" symbols.
- Unplug or remove the batteries from the device you want to test. If the device is still being powered, you can't test for continuity.
- Instead of having a range of numbers in its area, the continuity option only shows one sound wave. Twist the dial until it's pointing directly at the continuity sound wave to be sure it's on the right setting.
- Connect the probes to the ends of the component you're testing. Place the black probe on one end of the component and the red probe on the other. Make sure that the probes are both touching the ends at the same time so the multimeter works properly.[12]
- The component doesn't have to be disconnected from a circuit to test for continuity.
- It doesn't matter which probe you put on which end of the component.
- Examples of components you can test the continuity of are wires, switches, fuses, and conductors.
- You have to be touching two conductive ends to test for continuity. For example, two bare ends of a wire.
- Listen for a beep to signal that there's a strong connection. As soon as the two probes are touching the wire's ends, you should hear a beep if the wire is working well. If you don't hear a beep, this means you have a short in the wire.[13]
- If you have a cut or burnt wire, your wire might have a short.
- The beep is telling you that there's almost no resistance between the two points.
[Edit]How do you calculate current with a multimeter? - Plug in the test leads and turn the dial to the correct Amps setting. Insert the black plug into the COM terminal. Put the red plug into amps or milliamps, labeled with A or mA, depending on the amperage of what you're measuring current of. Locate the Amps setting and turn the multimeter's dial to it.[14]
- Your multimeter likely has two terminals for amps: one for currents up to 10 amps (10A) and one that measures up to roughly 300 milliamps (300mA). If you're not sure of the range of amperage you're measuring, place your red plug in the amps terminal.
- You can always switch to milliamps for a more precise reading if necessary.
- Some multimeters have two As, one for alternating current (used for residential power and represented by the wave sign) and one for direct current (used in batteries and wires and represented by a horizontal line with a dotted line under it). Direct current is the one that's most used for this reading.
- Cut the wire you're testing using a wire cutter. This is called breaking the circuit, and it turns your multimeter into an ammeter, which measures current. Use wire cutters to cut the wire you're testing in half. If your wire has insulation on it, strip off roughly of insulation towards the end of each cut using the wire cutters.[15]
- If you don't break the circuit by splicing the wires, you could blow a fuse and won't get an accurate reading.
- Keep in mind that this means you have to splice the wires back together after you test the current.
- In some instances, you can avoid cutting the wire by disconnecting one wire and touching the ammeter to the bare wire end as well as the pole of the circuit.
- Splice in the multimeter to give you an accurate reading. Hold one probe to one split end of the wire, and the other probe to the other split end. Use alligator clips to hold the probes and wires together so your hands are free. Read the number on the multimeter to tell you the amps or milliamps.[16]
- "Splicing in the multimeter" means that you're connecting the multimeter to the current going directly through the wires.
- Use a current measurement to troubleshoot the electrical flow in circuits. For instance, if the flow is low in just one section of a circuit, there might be a wire with bad continuity or a component with too much resistance in that part of the circuit.
- Write this number down so you don't forget it, if desired.
[Edit]Warnings - Always hold a multimeter's probes by the colored grips, which are insulated to protect you from shock.
- Don't let the probes touch when they're both in contact with their respective parts of a circuit or you can cause a short circuit and generate sparks.
- Never use a damaged multimeter that has cracked probe handles or frayed wires or you can get shocked.
[Edit]References [Edit]Quick Summary |
| How to Drink a Margarita Posted: 05 May 2021 05:00 PM PDT Margaritas are delicious tequila-based cocktails that are the perfect drink for summer. Whether you like a classic or blended margarita, or even a fun variation like a spicy or fruity margarita, they're easy to whip up, serve, and enjoy! [Edit]Ingredients [Edit]Classic Margarita - of silver tequila
- of lime juice
- of triple sec
Makes 1 margarita [Edit]Spicy Margarita - of silver tequila
- of lime juice
- of simple syrup
- of orange liqueur
Makes 1 margarita [Edit]Blended Margarita - of silver tequila
- of lime juice or 2 limes
- of triple sec
- of ice
Makes 1 margarita [Edit]Blended Mango Margarita - 1 bag of frozen mango chunks
- of lime juice
- of orange liqueur
- 2 tbsp (25 g) of superfine sugar
- of ice water
Makes 1 margarita [Edit]Drinking a Classic Margarita - Mix up your margarita ingredients in a cocktail shaker. Combine of tequila, of lime juice, and of triple sec. Put your ingredients into a cocktail shaker to make them easier to mix up.[1]
- You can use any kind of tequila you'd like, but most classic margaritas call for silver tequila.
- If you don't have a cocktail shaker, you can use an airtight glass jar with a lid.
- To make a spicy margarita, combine of silver tequila, of lime juice, of simple syrup, and of orange liqueur.[2]
- Add ice and shake your ingredients for 10 to 20 seconds. Fill your cocktail shaker up to the brim with ice. Put the lid on your cocktail shaker and hold it closed. Hold the shaker in front of you and shake it vigorously back and forth for about 20 seconds.[3]
- If you are using a glass jar, put the lid on tightly before you start shaking it.
- Pour your margarita into a margarita glass. Take the lid off your shaker or jar and pour your margarita into salt-lined glass. Fill the glass up all the way and serve it to 1 of your guests.[4]
- If you are using a cocktail shaker, place a cocktail strainer over the shaker as you pour to remove any large chunks of ice.
- Add a wedge of lime to your glass to make a classic cocktail. Take a lime wedge and stick it onto the rim of your glass on top of the salt. Tell your guests that they can squeeze the lime into the margarita or keep it as a garnish.[5]
- Lick the salt off the rim as you drink your margarita. Since tequila can be kind of bitter, it's fine to cut that with a mouthful of salt. Grab some with your tongue as you drink your margarita and enjoy the flavor combination of the lime, salt, and alcohol.[6]
- Rotate your glass to get all of the salt off the rim as you drink your margarita.
[Edit]Enjoying a Blended Margarita - Pour your margarita ingredients into a blender. Combine of tequila, of lime juice, and of triple sec for a classic margarita. Use a blender with large blades that can blend ingredients into fine chunks.[7]
- To make a blended mango margarita, combine 1 bag of frozen mango chunks, of lime juice, of orange liqueur, 2 tbsp (25 g) of superfine sugar, and of ice water.[8]
- Fill up the blender with of ice. Add large ice cubes to your blender to fill it up most of the way. Depending on the size of your blender, this could be between of ice.[9]
- Blend your mixture until it is mostly smooth. Turn on your blender and pulse it slightly until all of your ingredients make a smooth, slightly chunky mixture. You can add more ice to your margarita if you feel like it isn't blended enough.[10]
- You should only need to blend your ingredients for about 30 seconds until they reach the right consistency.
- Pour the blended margarita into a margarita glass. Remove the top from your blender and pour your margarita into a glass that has been rimmed with salt. Fill the entire glass up all the way to make 1 margarita.[11]
- Garnish it with a wedge of lime and a straw if you'd like to. Add a wedge of lime to the rim of your margarita to make it look cute, and give your guests a straw if they'd like one. Make sure the straw is fairly wide so that the blended ingredients don't get stuck.[12]
- Consider using a metal straw for a reusable option.
- Lick the salt off the rim as you drink your blended drink. Even if you are using a straw, you can still grab a mouthful of salt before each sip. Lift your drink up to you and lick the rim, then use the straw to sip your margarita.[13]
- If you don't like the salted rim, you can use the straw to avoid it altogether.
[Edit]Salting the Rim of Your Glass - Pour rock salt into a shallow dish. Rock salt, also called margarita salt, is salt kept in small chunks. Cover the bottom of a shallow dish with a layer of rock salt.[14]
- You can find rock salt at most grocery or liquor stores.
- If you don't want to use salt, you can use sugar for a sweet rim or tajin for a spicy kick.
- Run a lime wedge across the rim of your margarita glass. Cut the top and bottom off a lime. Slice the lime in half lengthwise. Then, slice one half of the lime in half widthwise to create 2 wedged pieces. Take 1 wedge piece and rub it across the entire rim of your margarita glass.[15]
- Margarita glasses are stemmed glasses with curved bowls on top.
- If you don't have a margarita glass, you can also use a martini glass.
- Dip the glass rim-first into the salt. Hold your margarita glass by the stem with the rim facing downwards. Gently dip the rim into your shallow dish to cover it with rock salt.[16]
- Try not to get too much salt on the inside of the rim. Instead, focus on the outer edges.
[Edit]Things You'll Need [Edit]Drinking a Classic Margarita - Cocktail shaker or glass jar
[Edit]Enjoying a Blended Margarita [Edit]Salting the Rim of Your Glass [Edit]Warnings - Always drink responsibly.
[Edit]References |
| How to Style Thin Flat Hair Posted: 05 May 2021 09:00 AM PDT Flat, thin hair can be a double-edged sword—while it's pretty low-maintenance, it can look limp after a while. There's no need to fear! Whether you're looking for a quick fix or a brand-new haircut, there are plenty of styling options for you to consider. [Edit]Best Products - Style your damp hair with a volumizing mousse. After hopping out of the shower, squirt a palm-sized amount of mousse onto a fine-tooth comb. Guide your comb through your hair, working the product from your roots through the entire strands.[1]
- Try not to overdo it! Too much product can leave your hair feeling heavy.
- Choose soft-hold hairspray. With fine hair, moderation is the name of the game. If you'd like to hold your hair in place, spritz over it with a soft-hold hairspray.[2]
- Toss out any heavy hair products, like waxes or pomades—these add a lot of weight to your hair, which isn't ideal.
- Try fibrous hair powder. Hair powder helps make your roots and part lines look a lot more filled in. Choose a product that matches your hair color, and spray it over the parts of your hair that are looking a little thin.[3]
- Hair powders work well with all kinds of hair!
- Spritz a salt spray over your damp hair to add volume. Once you've hopped out of the shower, spray the product over your roots. Grab a comb and work the salt spray through the rest of your hair. Then, dry off your hair with a blow-dryer to give it a little more volume.[4]
- Salt spray is a great way to give your hair some extra texture and volume.
[Edit]Styling Tips - Add fullness and height to your hair with a side part. Instead of splitting your hair down the middle, comb around two-thirds of it to the side. This disproportionate look makes your thin hair look really dynamic, and offers a lot of extra height.[5]
- If your hair is still looking a bit limp with a side part, part your hair to the opposite side instead.
- Dry your hair upside-down to give your hair more volume. After stepping out of the shower, tuck your head down and flip your hair forward. Work your fingers through your hair, squeezing the water out of your hair until your locks are about 60-70% dry. Then, stand up straight and blow-dry your hair, combing it through with a ceramic brush—this will help smooth out the ends of your hair and add a touch of softness to your look.[6]
- Use Velcro rollers to add height. Once you hop out of the shower, comb your hair and divide it into small sections. Wrap each section around a Velcro roller. Turn your blow-dryer to a cool setting and blast the curled sections of your hair. Take out the rollers once your hair is dry. Enjoy your lightly-curled hair for the rest of the day![7]
- Spritz texturizing spray through your dry hair. If your hair starts to lose its curl throughout the day, massage the texturizing spray into your hair to help re-style your hair.
- Back-comb your hair to add extra volume. Divide your hair around your crown into thin sections. Then, drag a comb backward through the hair, guiding it from your ends to your roots. Use this technique around the crown to add height. When you're finished, comb over the top of your hair in light, smooth motions to disguise the hair that you've back-combed.[8]
- Pull up long hair in a large bun. Center this bun along the back of your head, making it as round and dynamic as possible. This helps your hair look taller and bigger.[9]
- Secure your hair in a loose braid. Leave the front sections of your hair loose and untucked, so they can frame your face. Weave the rest of your hair into a loose braid, creating a casual but stylish look.[10]
- You can give this look a little more texture with a small flat-iron.
- Wear your hair half-up and half-down. Leave the bottom half of your hair draped over your shoulders and back. Then, divide the top half of your hair into 2 sections, and clip it on top.[11]
- You can create an elegant, satin-like effect by treating your hair with shine-boosting products.
- Split your hair down the middle with curtain bangs. Part your hair directly down the center, letting your bangs sweep in opposite directions. This gives your hair the appearance of volume without any special styling products.[12]
[Edit]Haircut and Color Options - Try a pixie cut. Short cuts are a great look with thin, flat hair, and pixie cuts are no exception. Trim your hair close to the forehead and ears, leaving your cheekbones and brows completely visible.[13]
- Go for a classic crew cut. Leave your hair a bit longer along the top of your head, while clipping the sides short. This easy style gives your hair a little more volume.[14]
- If you'd prefer a quicker solution, opt for a buzz cut instead.
- Comb over short hair. Work a little bit of pomade into your hair, and part your hair to the side. Guide the sides of your hair downward with a comb, and comb the top of your hair horizontally.[15]
- You can also use clippers to fade your sides into an undercut.
- Opt for a sleek bob. Trim your hair into a short bob, with your hair falling just below your cheekbones. For a really smooth look, tuck part of your hair behind your ear while letting the rest frame your face.[16]
- You can also experiment with a longer, neck-length bob—it's up to you![17]
- Add layers to wavy hair. Long hair can be tricky to manage, especially if it's naturally wavy. Style your hair into a shorter cut with lots of layers—this helps emphasize your natural waves.[18]
- Point-cut curly hair with a few layers. Don't get too many layers, or else your hair may look a bit out of control. Instead, opt for a few layers, using a point-cutting technique to give your locks a soft edge.[19]
- With point-cutting, you trim the hair vertically instead of horizontally.
- Experiment with choppy bangs for a fuller look. Don't worry about your bangs looking polished and perfect—instead, let your bangs look a bit tousled and unkempt. This is a great way to make your hair look a little less thin.[20]
- Opt for a balayage if you color your hair. Balayage is a special, gradient type of highlighting that creates dramatic accents in your hair. Stop by the salon, or pick up an at-home kit to recolor your hair. This is a great way to give your hair some extra texture without adding a new product each day.[21]
- Clip in some extensions to add length. Pick out extensions that are a close match to your hair color.[22] Pull up part of your hair and clip in the extensions to the bottom half of your hair to give your locks a little more volume.[23]
- Wear floral hair accessories, like a string of fake flowers. These can add an extra dimension to your hair.[24]
- Part your hair to the side. Side parts work great with both long and short hair, and help give your hairstyle some depth.[25]
- Apply all your texturizing products by hand. Spritz a little bit of product into your hands, and massage it into your hair with your fingers.[26]
[Edit]References |
Nenhum comentário:
Postar um comentário