How to Solder SMD !




About: Hi, I'm Nemeen, Electronics Enthusiast! I have seen a huge decline in electronics hobbyist in past few years. I started this channel in order to inspire you to create. Hopefully, you will find something tha...

In last few decades a new technology so-called SMD which stands for Surface Mount Devices is taking over THT so today in this Instructables I will show you what are SMD components and how to solder them,

So let's get started!

I've also done an instructable on Soldering Through Hole Parts (THT) so check out that as well.

Step 1: Watch the Video !

If you don't want to read all the stuff you can watch my Video

Step 2: Everything We Need !

We will be learning to solder on all different components,

here is my list of components I will be using,

1) Atmega 328P-AU

2) 16MHz Resonator

3) TP4056

4) LED (0805)

5) 100nF Capacitor (0603)

6) 1k Resistor (0603)

Tools we need,

1) Solder station

2) Solder wire

3) Solder Paste

Step 3: Sizes of SMD

SMD components are rectangular in shape. Components have metalized areas at either end of the body and this enables them to make contact with the printed circuit board through the solder. Whereas THT components have leads and SMDs are way smaller than THT and speaking about size SMD have different sizes such as

  • 0603
  • 0805
  • 1206
  • 1210
  • 2010
  • 2512

All these numbers indicate the actual size of the components such as 2512 indicates a length of 0.25inch and a width of 0.12 inch

Step 4: Soldering Resistor, Capacitor, Etc

Place PCB on a flat surface, then secure it in place using tape. Now using soldering iron apply solder on one pad, the push the component in its place the Re-heat the solder and solder one terminal. Now solder the remaining terminal.

This method can be very fast and but cannot be used for components below 0603 size.

Step 5: Soldering SOP IC's

First, Place the component with tweezers on pads and then using fine solder tip and solder the one terminal. Then solder the diagonally opposite terminal and now you can solder all the terminals. Using flux is not mandatory here. This method is quite useful for soldering SOP IC.

Step 6: Soldering TQFP IC's

Soldering TQFP IC is quite tedious so we will use Hot air soldering for this IC package

  • First apply solder paste just enough to cover solder pads.
  • Now place the IC on it.
  • Hold it in place with tweezers and use a Hot air gun to solder it
  • Temperature Should be around 315C (~600F)

Step 7: Thank You !

That's everything you need to know about SMD soldering,

Feel free to check out my YouTube channel for more awesome stuff:

You can also follow me on Facebook, Twitter etc for upcoming projects

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    9 Discussions


    5 months ago

    I would suggest using some flux to get some better solder joints


    7 months ago

    Great tutorial


    Question 7 months ago

    What kind of solder do you use for these types of applications?


    7 months ago

    Have just replaced an Arduino Nano 32-pin TQFP. I don't have hot air reworking gear.
    The hardest part is to remove the old chip. I use a soldering iron and solder wick to pull as much solder off as possible. Keep the iron tip on the braid and drag it along the line of pins on each side.
    Put the iron tip on the leg of the pin where it enters the plastic. Slide a scalpel blade under the leg. If the chip has "gone", just bend the leg up. Repeat until there are half a dozen legs free. Slide the scalpel blade under the body of the chip and gently ease it up while running the iron along the legs. The trick is to avoid lifting the pads and tracks as well.
    When the chip if off, clean up the pads with solder braid.
    User a tacky flux like Chip Qwik SMD 291 on all the pads and seat the new chip in place. Use the scalpel to hold the chip in place and solder one leg using a very fine multicore solder and a good quality fine iron tip. Heat the leg first and apply the solder - good lighting and a good magnifier helps a lot. Repeat this for the remaining legs. Check for bridging solder and either dab it with the iron or use braid. Use Nick Gammons excellent "Arduino sketches" to check the chip and burn the bootloader.


    7 months ago

    thank you for this video - long time thru-hole soldering experience but starting to work more with SMD and this is a very helpful video.


    8 months ago

    Nice little quick tutorial, thanks!

    Carl Stone

    8 months ago

    Nice instructable, well explained for beginers like me :D

    Ps: you earned my vote for the contest! :-)

    1 reply