Electrical and electronic tools

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Notify me of new posts by email. Lets be friends, find me on Facebook , Twitter, and Google Plus. Electrical Technology 8 2 minutes read. Show More. Related Articles. A multimeter is a measurement tool that you can use to measure three basic electrical characteristics. They are voltage, current, and resistance level. Therefore, we also can call it an ammeter, voltmeter, and ohmmeter. This tool has three main parts. First of all is the display, which shows you the measuring result.

In the past, it still used the needle-type to display the result. This analog display shows it by moving the needle to the specific number of measuring results. Today, we can find the Multimeter that uses LCD, which gives you more accurate results than the old model.

The other two are the control panel, where you can adjust the measurement level. You also use it to change the mode between ammeter, voltmeter, and ohmmeter. Then, there is also the measuring stick. It will start the measuring process when you put it on the component or area you want to measure. All technicians always have this tool in their bags whenever they do their job because of its multiple functionalities.

An oscilloscope is a tool for measuring the voltage level of an electronic circuit. You can measure the voltage change by using a Multimeter. The oscilloscope can do it without any problem. Oscilloscope has a display that shows you a graphic of voltage changes over time. There are two things you can read on its display, which is the vertical axis that shows you the voltage change and the horizontal axis is a time indicator.

The working tool in a drill is the drill bit. Sets of drill bits in various sizes are widely available, in a variety of cases and holders. These range from small kits, like the one shown in Figure , to large sets found in machine shops and industrial settings. Not all drills are created equal, and most of the low-cost drill bit sets contain bits that will not stand up to extended or heavy use.

Some drill bits are intended for special-purpose applications, such as drilling the holes in a printed circuit board. Figure shows a selection of these types of drill bits. Notice the color-coded plastic collars on the bit shanks. You can also find PCB drill bits listed as surplus items, mainly because the materials used to make PCBs tend to be hard on drill bits and they quickly get too dull to meet manufacturing standards.

But, as always, caveat emptor. You may end up with a collection of dull or broken drills that are essentially useless. Better to spend a bit more and get one of the imported sets of new bits.

They might not be top quality, but with careful use, they will do the job. Note that small drills bits like those shown in Figure are useful for soft materials like plastic or wood, and of course they will make a hole in a PCB if they are sharp.

In general, these types of drill bits will not work well with hard metals, but they can be used with soft metals like lead, silver, and gold. Sometimes you really need a threaded hole, or maybe you want to make a special-purpose threaded shaft.

Tapping is the process of cutting threads into an appropriately sized hole with a tool called a tap. A die is a tool for cutting threads into a blank rod to create a threaded shaft, and it is also sometimes used to repair damaged screw or bolt threads. Figure shows an inexpensive tap and die kit. A tap and die kit is handy to have around, but it must be used with care to avoid damage to the tools.

A small saw is useful for cutting things like tubing and sections of sheet materials. Figure shows a type of miniature hacksaw that is readily available at hardware and home improvement stores. These tools will accept a standard hacksaw blade, and they are useful for getting into tight places. This allows it to make sharp turns without binding, but it also means that it easy to snap the blade if you apply too much force while cutting.

However, you will find that there is often a need to cut plastic or metal tubing, aluminum extrusions, or small plastic or soft aluminum panels. For jobs like these, miniature tools are available, like the little table saw shown in Figure You could, with a little effort, build table extensions for it to handle larger items, but then you would be treading into the territory of full-size table saws. For cutting tubing, extrusions, rods, or other long, thin items, a cut-off saw with a grinder blade is a handy tool.

Also known as a chop saw , a cut-off saw will produce a nice, clean cut, without the roughness and jagged edges that can result when a hacksaw is used. Figure shows one of the various types of miniature cut-off saws that are available.

Note that some of these types of tools will work only with a grinder wheel, not an actual saw blade. The primary advantage of small saws like these is their convenience and ability to deal with small work pieces. Just keep in mind that, like any powered tool, these are not toys. Although they are miniature versions of the full-size tools found in metal and woodworking shops, they can still cut you badly. Losing a finger with careless use is a distinct possibility, just as with their larger cousins.

If you will be working with metal, there are some tools that you really should consider having in your toolbox. Metal can be a frustrating material to deal with, and having the right tool for the job can make the difference between annoyance and satisfaction.

When you are drilling or cutting a hole in sheet metal, the result often has sharp edges or little bits of leftover material called burrs. This most often happens when you attempt to make a hole without going through a series of step-up holes first see not available for drilling techniques , which is a common mistake of the impatient. A deburring tool, as shown in Figure , is essentially a swivel blade set in a handle. It is used in a circular motion to trim the inside of a hole or cut-out, removing burrs and helping to smooth out the cut.

These tools are inexpensive and readily available from a variety of sources. Creating a starting point is a good idea when working with metal. The automatic punch, shown in Figure , is designed to take the place of a hand-held punch and ball-peen hammer. To use it, you simply push down until the internal spring-loaded mechanism releases, which causes the tip to create a small indentation in the material.

The concept of step-up drilling was mentioned earlier and is discussed in not available , but there is a tool that makes the process easier which should not be surprising, since there seems to be a tool for every conceivable use. This is called a step drill , and a typical step drill set is shown in Figure A step drill is best suited for soft materials, such as plastic, soft aluminum, or mild steel as found in electrical boxes. Step drills are often used by electricians to make conduit holes in electrical enclosures.

Brave and bold electricians notwithstanding, I would suggest that a step drill be used with a drill press if possible, since it can potentially bind in the hole and twist the drill out of your hands. An electric drill can spin around and hit your hand before you can move it out of the way, and you could end up with a broken bone or two.

At the very least, you can get a nice bruise if a drill gets away from you. When buying a step drill, get the best one you can afford. Tweezers for electronics work come in a range of styles, as shown in Figure In addition to tweezers that operate like the ones found in a home medicine cabinet, there are also self-closing types, where you have to force the tips apart rather than force them together.

A decent soldering iron or a soldering station is absolutely essential for working with electronics. A soldering gun is typically used for connecting heavy gauge wires and copper tubing, not for working with components on a PCB. Better yet, throw it away, donate it, or convert it into a low-cost spot welder. Figure shows a low-cost temperature-controlled soldering iron.

Companies such as Weller make excellent industrial-grade soldering stations with continuous temperature control and grounded tips to reduce possible damage from static discharge. A variety of tip sizes and styles is available, ranging from something like a slot screwdriver to very fine points for surface-mount technology SMT work. Figure shows a low-cost soldering station sold by Velleman, which includes the tool holder and a control unit to regulate the tip temperature.

Working with surface-mount parts requires soldering tools that are capable of working with small parts and closely spaced leads. Page You're currently reading page 1 Page 2 Page Next.

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