Soldering and Desoldering Surface Mount Components
Feb 08, · How to Remove SMD Components without Hot Air GunAmazing Tool Home made using 25w Soldering iron . Best video Life zi255.com://zi255.com?. Dec 17, · Demonstrates how to quickly remove SMD components without special equipment. Also demonstrates how to use special tweezer irons. Recommended Products:chipqui.
Electrical Engineering Stack Exchange is a question and answer site for electronics and electrical engineering professionals, students, and enthusiasts. It only takes a minute to sign up. Connect and share knowledge within a single location that is structured and easy to search. Redneck SMD removal: As you can see from the comments above, it depends what kind of equipment you have and what you are willing to buy.
If you are trying to rescue random components from old circuit boards, I'm guessing you might not interested in spending hundreds on new equipment.
I can give you a few tips when it comes to removing things with a simple soldering iron, solder, and some tweezers. Two terminal devices are not how to stop someone from spoofing my phone number difficult, especially if they are small. The trick is to keep both sides hot at the same time so you can lift it off the board. Adding more solder to each pad provides some extra "thermal mass" so that the blobs of solder stay molten for longer after you move the iron away.
Apply very slight upward pressure on the component with your tweezers while moving the soldering iron back and forth to the solder blobs on each side. Sometimes you have to move back and forth fairly quickly, pausing briefly at each side long enough to make a thermal connection. If you are having trouble with this add a bit more solder. This method also works for small chips, such as ones with a set of 4 pins on two sides.
Chips are more difficult, especially largish ones. If they are too big they are pretty much impossible with this method. As stated above, put a blob of solder over each set of pins.
This adds thermal mass and makes it so you how to install gnupg on linux heat up one set of pins all at the same time. Unfortunately, for larger chips you probably can't provide enough heat to such a large mass of solder to keep it molten using the "back and forth" method above.
I also find it difficult to use tweezers in this case. Instead, I slip a thin, sharp object under a corner of the chip such as an Xacto knife or very small flat head screwdriver and apply slight upward leverage while slowly alternating between heating up each set of pins.
The chip will slowly migrate upward off the board. The most important moment to be apply leverage is obviously as a set of pins goes from molten to non-molten; that is when it becomes cemented in its new position. Sometimes each little move upward is imperceptible, it can take a bit of effort.
Obviously this process is very difficult and has a good change of damaging things! For better results, see more expensive equipment options noted above. If you don't care about the circuit board and nothing is working, you can always pry the component off with force -- if the pads rip off the board before the chip breaks, success!
Then you can just unsolder the copper pads from the pins. This works well for sturdy components like potentiometers and large surface mount inductors and capacitors. For some unknown reason, I felt compelled to perfect my skill at this very thing. I suppose it was a sense it would come in handy for rework or for recovering interesting components from electronic scrap boards. The main thing I found is that pre-heating the board is critical. I suppose there are various improvised ways to do this, perhaps a blow dryer duct-taped to blow across the bottom of the board; but I use a Hakko FR Most components will come off very cleanly with a second or two of hot air applied from the top.
Applying a paste flux helps keep too much solder from clinging to the leads of the removed component. When I started, I just used the hot air from the top and that took a long time seconds and seemed to stress the components with heat.
The capacitors in particular would start to smell. With the pre-heating, it's so quick it seems most components barely feel a thing :.
I know it's a bit of an investment, but if you're serious about it, I think a few hundred bucks for hot air will make you a lot better at it. It told only few seconds. Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams?
Learn more. Asked 5 years, 5 months ago. Active 2 years, 8 months ago. Viewed 17k times. Improve this question. MarkU Enthurzan Enthurzan 1 1 gold badge 4 4 silver badges 10 10 bronze badges. Somewhat less suitable is covering with solder blob and then heating with hot air.
Tweezer or tweezers, both spelling seem to be correct. Either use a purpose-built unit or put a thick 1" piece of aluminum on an electric griddle or fry pan.
This works - I just removed some parts from a dead board using this method today. Note this is not a a great method if there are through-hole parts that stop the PCB substrate from sitting right on top of the hot surface. Even a small air gap reduces the heat transfer significantly. I would expect that is the most reliable way to heat up the pins evenly. Show 6 more comments.
Active Oldest Votes. The last step is to get the excess solder off the parts using something like soder-wick. Improve this answer. Magic Smoke Magic Smoke 8 8 bronze badges. If you don't have one, try setting something heavy on the edge of the board.
Add a comment. With the pre-heating, it's so quick it seems most components barely feel a thing : I know it's a bit of an investment, but if you're serious about it, I think a few hundred bucks for learn how to crypt walk air will make you a lot better at it. Atmega Atmega 1, 3 3 gold badges 14 14 silver badges 36 36 bronze badges. Sign up or log in Sign up using Google.
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8.2.1 Component Removal, Surface Mount Chip Components, Forked Tip Method
Jan 04, · In this video demonstration we show you how to properly remove a surface mounted component using SMD removal alloy, flux and a soldering zi255.comts Used:R. Feb 05, · Find electronic components on zi255.com is a proffesional elelctronice supplier with more than 2 million product, lower price with fr. Take the irons, one in the left hand and one in the right Place one iron on the left side of the component and the other on the right, making contact with the pad and the component The solder should melt and the component can be removed simply by moving the soldering irons with the component between the tips, like tweezers. No force should be used, you may need to add a little solder to the tips to help Estimated Reading Time: 1 min.
I will show you how to remove surface mount chip components. What is Needed 2 soldering irons solder desolder braid My camera would not take a close up of a resistor see the 2nd photo for demo. Follow these steps Let the irons heat up. Take the irons , one in the left hand and one in the right Place one iron on the left side of the component and the other on the right, making contact with the pad and the component The solder should melt and the component can be removed simply by moving the soldering irons with the component between the tips, like tweezers.
No force should be used , you may need to add a little solder to the tips to help transfer heat. Now the component is removed use the solder braid and clean the solder from the pads. This process takes seconds. You can use the solder braid but most of the time the braid will not remove all of the solder and the pads can be damaged when removing the component. At work I have thermal tweezers, but at home i use this method.
Comes in handy removing the LEDs from xbox controllers. I this write up was informative, any questions just ask. By ColorBomb Follow. More by the author:. About: I am work in a high voltage laboratory, the largest laboratory owned by a university. I am in love with electricity.
I have been fortunate enough to work with a variety of green technology including fuel cells… More About ColorBomb ». Did you make this project? Share it with us! I Made It! Reply Upvote. Pfft hammer and chisel. The little suckers just go flying right off!