Learning how to solder w/ proper soldering techniques is a an essential skill every an equipment should master. In this tutorial, we overview the basics the soldering irons, soldering stations, species of solder, desoldering and safety tips. Even if it is you’re building a robot or working with Arduino, knowing exactly how to solder will certainly come in handy.

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FREE EBOOK (PDF) – Learn exactly how To Solder (17 page Ebook)

What Is Soldering?

If you were to take it apart any type of electronic machine that contains a circuit board, you’ll check out the components are attached making use of soldering techniques. Soldering is the procedure of joining 2 or more electronic components together by melt solder about the connection. Solder is a metal alloy and also when that cools it creates a solid electrical bond in between the parts. Also though soldering can create a irreversible connection, the can additionally be reversed making use of a desoldering tool as described below.


Soldering Tools

The good thing about learning exactly how to solder is the reality that friend don’t require a many to gain started. Below we’ll overview the straightforward tools and materials friend will need for many of your soldering projects.

Soldering Iron

A soldering stole is a hand tool that plugs into a standard 120v AC outlet and heats up in order come melt solder approximately electrical connections. This is one of the most vital tools provided in soldering and it have the right to come in a couple of variations such together pen or pistol form. Because that beginners, it’s recommended the you usage the pen format soldering iron in the 15W come 30W range. Many soldering irons have actually interchangeable tips that can be used for different soldering applications. Be really cautious once using any form of soldering iron due to the fact that it deserve to heat up to 896′ F i m sorry is incredibly hot.


Soldering Station

A soldering terminal is a more advanced version of the straightforward standalone soldering pen. If you space going to it is in doing a the majority of soldering, these are good to have actually as lock offer an ext flexibility and control. The main benefit of a soldering terminal is the capability to precisely adjust the temperature of the soldering iron which is an excellent for a variety of projects. These stations can additionally create a safer workspace as part include advanced temperature sensors, alert settings and also even password defense for safety.


Soldering stole Tips

At the end of most soldering irons is one interchangeable part known as a soldering tip. Over there are numerous variations of this tip and also they come in a wide variety of shapes and also sizes. Each tip is offered for a specific purpose and offers a distinct benefit over another. The most common tips girlfriend will usage in electronics projects space the conical tip and the chisel tip.

Conical Tip – provided in precision electronics soldering due to the fact that of the well tip. Since of its sharp end, it’s may be to provide heat to smaller areas without affect its surroundings.

Chisel Tip – This pointer is well-suited to soldering wires or other bigger components due to the fact that of its wide flat tip.

Image credit transaction – Sparkfun.com

Brass or standard Sponge

Using a sponge will help to store the soldering iron tip clean by removing the oxidation the forms. Tips v oxidation will tend to rotate black and not accept solder together it did once it was new. You might use a conventional wet sponge but this has tendency to shorten the expectation of the tip due to expansion and also contraction. Also, a wet sponge will certainly drop the temperature that the guideline temporarily when wiped. A better alternative is to use a brass sponge as displayed on the left.


Soldering iron Stand

A soldering iron stand is very straightforward but really useful and handy come have. This stand helps prevent the warm iron reminder from coming in call with flammable materials or causing accidental injury to her hand. Many soldering stations come with this constructed in and additionally include a sponge or brass sponge for cleaning the tip.



Solder is a metal alloy material that is melted to create a long-term bond between electrical parts. It come in both lead and lead-free variations v diameters of .032″ and also .062″ being the many common. Inside the solder main point is a material recognized as flux which help improve electrical contact and also its mechanically strength.

For electronics soldering, the most generally used kind is lead-free rosin main point solder. This type of solder is usually comprised of a Tin/Copper alloy. Girlfriend can likewise use leaded 60/40 (60% tin, 40% lead) rosin core solder yet it’s ending up being less popular as result of health concerns. If you execute use lead solder, make sure you have proper ventilation and also that you wash her hands after ~ use.


When to buy solder, make certain NOT to usage acid main point solder as this will damage your circuits and components. Acid core solder is offered at home improvement stores and also is mainly used for plumbing and metal working.

As discussed earlier, solder does come in a couple of different diameters. The thicker diameter solder (.062″) is great for soldering bigger joints an ext quickly yet it can make soldering smaller sized joints difficult. Because that this reason, it’s constantly a great idea to have actually both size on hand for your various projects.

Helping Hand (Third Hand)

A help hand is a machine that has actually 2 or an ext alligator clips and sometimes a magnifying glass/light attached. This clips will help you by hold the item you room trying to solder if you usage the soldering iron and also solder. A really helpful device to have in her makerspace.


Soldering Safety

Now the you know what tools and materials space required, it’s time come briefly comment on ways of remaining safe while soldering.

Soldering irons can reach temperature of 800′ F therefore it’s an extremely important to know where your iron is at all times. We constantly recommend you usage a soldering iron was standing to help prevent inadvertently burns or damage.


Make certain you space soldering in a well ventilated area. Once solder is heated, there room fumes released that space harmful to your eyes and also lungs. It’s recommended to usage a fume extractor i m sorry is a fan through a charcoal filter the absorbs the harmful solder smoke you deserve to visit website like incorporated Air equipment for waiting filtration systems.

It’s always a good idea come wear safety eye stay in situation of accidental splashes of hot solder. Lastly, make sure to wash your hands when done soldering particularly if making use of lead solder.

Tinning The Tip

Before you deserve to start soldering, you have to prep her soldering stole by tinning the guideline with solder. This process will assist improve the warmth transfer native the iron come the article you’re soldering. Tinning will certainly also help to defend the tip and also reduce wear.

Step 1: begin by making sure the pointer is attached come the iron and screwed tightly in place.

Step 2: revolve on her soldering iron and also let it heat up. If you have a soldering station with an adjustable temp control, collection it come 400′ C/ 752′ F.

Step 3: Wipe the reminder of the soldering iron on a wet wet sponge to clean it. Wait a few seconds to let the tip heat up again before proceeding to step 4.

Step 4: organize the soldering iron in one hand and also solder in the other. Touch the solder to the tip of the iron and also make sure the solder operation evenly roughly the tip.


You should tin the tip of her iron before and after every soldering session to extend its life. Eventually, every guideline will undertake out and will need replacing as soon as it becomes turbulent or pitted.

How come Solder

To better explain exactly how to solder, we’re going to show it with a real civilization application. In this example, we’re going to solder an resulted in a circuit board.

Step 1: mount The Component – begin by inserting the leads of the LED into the holes of the circuit board. Flip the plank over and bend the leads outward at a 45′ angle. This will aid the component do a much better connection through the copper pad and prevent it from falling the end while soldering.


Step 2: warmth The Joint – revolve your soldering iron on and also if it has actually an flexible heat control, collection it come 400’C. At this point, touch the guideline of the iron to the copper pad and the resistor lead at the exact same time. You require to organize the soldering stole in location for 3-4 secs in bespeak to warmth the pad and also the lead.


Step 3: apply Solder to Joint – proceed holding the soldering stole on the copper pad and the lead and also touch your solder come the joint. IMPORTANT – Don’t touch the solder directly to the pointer of the iron. You want the joint to it is in hot enough to melt the solder once it’s touched. If the share is too cold, the will kind a negative connection.


Step 4: Snip The Leads – remove the soldering iron and also let the solder cool under naturally. Don’t blow on the solder together this will reason a bad joint. As soon as cool, you can snip the extra cable from leads.

A suitable solder share is smooth, shiny and looks prefer a volcano or cone shape. You want just sufficient solder come cover the whole joint yet not too much so it i do not care a round or pour out to a adjacent lead or joint.


How to Solder Wires

Now it’s time to show you just how to solder wires together. For this process, it’s encourage to usage helping hand or other type of clamp device.

Begin by remove the insulation from the ends of both wires you room soldering together. If the wire is stranded, twist the strands together with your fingers.


Make certain your soldering steel is fully heated and touch the reminder to the finish of among the wires. Host it top top the wire for 3-4 seconds.


Keep the steel in place and touch the solder to the wire till it’s completely coated. Repeat this process on the other wire.


Hold the 2 tinned wires on optimal of each other and touch the soldering iron to both wires. This process should melt the solder and also coat both wires evenly.


Remove the soldering iron and wait a couple of seconds come let the soldered connection cool and harden. Use heat shrink to cover the connection.



The great thing about using solder is the truth that it deserve to be removed easily in a technique known as desoldering. This come in handy if you have to remove a component or make a correction to your digital circuit.

To desolder a joint, you will need solder wick i beg your pardon is additionally known together desoldering braid.


Step 1 – ar a item of the desoldering braid on height of the joint/solder you desire removed.

Step 2 – warm your soldering iron and touch the guideline to the top of the braid. This will heat the solder below which will certainly then be absorbed into the desoldering braid. You deserve to now eliminate the braid to watch the solder has actually been extracted and also removed. Be mindful touching the braid once you room heating it because it will acquire hot.


Optional – If you have actually a most solder you want removed, you may want to usage a an equipment called a solder sucker. This is a handheld mechanical vacuum that suck up hot solder through a press of a button.

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To use, push the plunger under at the finish of the solder sucker. Heat the joint v your soldering iron and place the guideline of the solder sucker end the hot solder. Push the release switch to suck up the fluid solder. In order to north the solder sucker, press down top top the plunger.