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27 DIY Spot Welder That Are Cheap And Easy To Make

A DIY spot welder works by putting the power of creating defined welds in small areas without taking a large chunk out of your bank account. If you are the household handyman and do all the repairs, then a homemade spot welder can make your life much easier.

An inexpensive DIY spot welder can help you make repairs to microwave ovens, small kitchen appliances, vacuum cleaners, and various electronic items. Spot welding allows you to create a defined point of contact weld without generating too much heat. The reduced amount of heat allows for welding to be in tight spaces.

Save yourself some money by building your own spot welder, then save even more money by using the DIY spot welder to make household repairs.

1. Cheap DIY Spot Welder

Use these detailed instructions for building a diy spot welder by mods-n-hacks.gadgethacks that is sure to help you out with many household repairs. Making repairs to items you already own with a DIY spot welder will also save you money and be better for the planet.

Recycling useful items helps to keep trash out of the landfill and more money in your pocket. All DIY projects are meant to save you money and/or recycle useful objects and an arduino spot welder is no exception.

Cheap DIY Spot Welder
Cheap Spot Welder Image By mods-n-hacks.gadgethacks

2. DIY Spot Welder Plans

Watch this detailed video to learn how to build a cheap spot welder by Made in Poland on youtube. If you want to create this spot welder you can download the plans to go along with the YouTube video.

This creative design we have makes this one of the best set of free online plans for a homemade spot welder. DIY projects can be fun, fast, and affordable when you watch instructional YouTube like this one.

3. Spot Welding Machine

A DIY spot welding machine by mistrymaketool is so handy in the workshop, and once you get used to it you will wonder how you have got by without one.

At third one we have a small, easy to build diy spot welder that uses a little pressure and a lot of heat to fuse two metal pieces together. The welded union will be strong and will enable you to repair and create many more items in your home work shop.

A homemade spot welder is useful for many applications, including automotive, metal furniture, crafting, artwork, remodeling, and home construction. Think of all the creations you could build and repairs that you could do if you had a spot welding machine like this one.

As we all know spot welding is one of the oldest welding methods that joins two or more metal components without the use of any type of filler material. You can build this small but powerful welding machine quickly and inexpensively.

DIY spot welder
Small and Powerful Spot Welder, Image By mistrymaketool

4. Microwave DIY Spot Welder

Not only can a spot welder help you repair a non-functioning microwave, but parts of an old microwave can be used to build a spot welder instructables. Salvaged parts from an old microwave can be recycled into a handy resistance spot welder with these easy to follow instructions.

Microwave DIY Spot Welder
Microwave DIY Spot Welder, Image By instructables

5. DIY Spot Welder For Electronics

Follow these step by step instructions for building a DIY spot welder by hackaday that is useful for repairing electronics. This website instructions also contain a second part that will show you how to create a controller for the homemade spot welder so you can create strong welds in delicate places.

DIY Spot Welder For Electronics
Homemade Spot Welder For Electronics, Image By hackaday

6. Small Homemade Spot Welder

Here we have another useful idea for recycling components from an old microwave into a small DIY spot welder. The homemade welder by makezine may be small in size but it has the power to permanently weld sheet metal and to perform quick brazing jobs.

Use the transformer from a non-functioning microwave and a few other components in addition to welding table to create this powerful small spot welder.

Small Homemade Spot Welder
Small Homemade Spot Welder, Image By makezine

7. Microwave Transformer DIY Spot Welder

This is a large diy spot welder by hackaday that has more power than the homemade welders we have discussed before.

This DIY project takes three videos to cover all the details of the build but it’s well worth watching. The finished welder is powerful enough to handle any household project and the finished product looks very professional.

Microwave Transformer DIY Spot Welder
Microwave Transformer DIY Spot Welding machine, Image via: hackaday

8. DIY Battery Spot Welder

Why pay over $100 for an arduino spot welder when you can just make one of these for a fraction of the cost? Save money and get the battery spot welder like this by darkkevind one youtube by following these free plans.

This detailed YouTube video will take you through the building process so you can build a DIY battery spot welder very cheaply. The video is very informative and helpful for first-time welder builders.

9. DIY Battery Spot Welder

If you don’t want to build a DIY spot welder like this one by WeAreTheWatt on youtube from recycled parts, consider building one from a kit like this one. This welder kit and YouTube video will make the build very easy and the finished product very useful.

This spot welder kit is affordable and can be put together quickly. You will be able to get all the welding repairs completed and marked off your to-do list with this small and powerful spot welder.

10. Arduino Battery Spot Welder

This is an ideal DIY battery spot welder by instructables and is easy to build by following these instructions. The video takes you through the build step by step, plus there are pictures and written instructions to show you how to use this diy arduino battery spot welder after you finish building it.

Think of all the projects you can complete around the house with a new spot welder, then get busy building the welder with these detailed instructions.

DIY Arduino Battery Spot Welder
DIY Arduino Battery Spot Welder, Image via: instructables

11. Homemade Spot Welder

A light-duty homemade spot welder by instructables is easy to build from recycled parts and these detailed instructions. An old transformer from a microwave and a few other recycled components can be put together to create a new homemade spot welder that can handle small welding jobs.

To make this diy spot welder you will need cutting blade (hacksaw blade),three MOTs (Microwave Oven Transformers), hammer, wood, copper tube. Repair those broken electronics and create something new with this useful welder.

Homemade Spot Welder
DIY Spot Welder to Handle Small Welding Jobs, Image via: instructables

12. Tab DIY Spot Welder

Simple construction and accurate electrode force adjustment are part of this DIY tab spot welder by avdweb.nl. The double pulse this DIY spot welder generates better clamping ability and the current can be adjusted to suit the welding task.

Pictorial instructions along with written instructions provide all the details and precautions for this DIY project.

Tab DIY Spot Welder
Tab Spot Welder For Welding Task, Image via: avdweb.nl

13. Battery Pack DIY Spot Welder

Use this idea to build either a spot welder with an arduino controlled timer or a spot weld controller. The welder is the same, just the way to control the weld is optional so you choose the one that works best for you.

Small size and simple build make this a great DIY to complete in one afternoon. This is an affordable DIY project and the finished DIY spot welder by rcgroups will allow you get create welds in those hard to reach areas.

Battery Pack DIY Spot Welder
Battery Pack Homemade Spot Welder, Image via: rcgroups

14. DIY Spot Welder For Batteries

A DIY spot welder by hackaday for batteries is easy to build with these free instructions. Written instructions and pictorial diagrams make this building plan easy to follow. Some of the components for this DIY project can be purchased from the Dollar Tree store, making this a very inexpensive project.

DIY Spot Welder For Batteries
Homemade Spot Welder For Batteries, Image via: hackaday

15. Recycled Microwave Oven

A deconstructed microwave oven was used to build this DIY spot welder by instructables and you can build one just like it with these free plans.

Plans are also included to build a stationary metal frame so the spot welder will remain in one location. It’s too large and heavy to be portable but it’s ideal for the home work shop.

These free plans for building a DIY spot welding machine include written instructions, pictorial instruction, and a video. The building process is easy to understand and since it recycles an old microwave oven, you will be keeping a useful item out of the landfill.

If you have been wanting a spot welder for your home DIY projects, this one is for you. it can get the welding tasks done and it won’t cost you too much to build. You may also like to go through homemade forge to do your blacksmith tasks.

Recycled Microwave Oven
Recycled Microwave Oven, Image : By instructables

16. Battery Spot Welder

This DIY battery spot welder by instructables is easy to create and is ideal for a one-time welding job.

Sometimes you just have one DIY project that you need a spot welder for and then it probably will never be used again. This battery spot welder is perfect for that one-time job.

If you have a project that you are wanting to tackle but don’t want to invest a lot of money in spot welder, check out this DIY battery spot welder. it is fast and easy to build, it does not cost much to build, and it will enable you to build that special project.

A battery, car solenoid, and some copper nails are most of the items that you will need to build this battery spot welder. You can build it and have it ready to use in about one hour.

Battery Spot Welder
Battery Spot Welding Project To Do One-Time Welding Job, Image By instructables

17. Simple Spot Welder

This DIY spot welder by Maciej Nowak Projects on Youtube is simple to build and simple to use. It is not a complicated or elaborate machine, but it is efficient.

This YouTube video will show you how to build this simple spot welder with detailed steps. The video instructions are clear, precise, and easy to follow so you won’t be confused during the building process.

When the spot welder build is complete, it will be an efficient machine that will be welcomed in any home work shop. It is very useful when welding sheet metal, wire mesh, or other metal components. Spot welding is one of the most efficient welding processes and has a wide range of uses for building and repairing items around the house.

18. Mini Spot Welder

You can learn how to create a mini DIY spot welder like this one by Creative Etc in this informative YouTube video.

This DIY project recycles some of the components from a used microwave oven, and combines it with copper wiring and a battery to create a mini spot welder. It’s great for all those small DIY projects around the house that require metal components to be fused together.

If you want to take your DIY projects to the next level and start fusing metals together, start small with this mini spot welder. Then when you see how great it is to have a spot welder in your work shop, check out the plans for the larger DIY spot welders and build one of those for your work shop.

19. Microwave Oven Transformer

When you upgrade your home microwave, save the old one to create a DIY spot welder by boccelliengineering for your work shop.

Microwave ovens have transformers that can be used to create a spot welder. These free plans will show you how to build one for yourself. And the great thing about using the transformers from an old microwave oven is that it will keep a useful objects out of the landfill. If you don’t have an old microwave at home, one can be purchased from a thrift store or flea market for a very cheap price.

Spot welding uses electricity to fuse metal components together. The fused joint is strong and will last. The spot welder fuses the metal in one spot and it does it very quickly so the metal does not heat up.

When you have small welding projects that need to get done, a DIY spot welder can help you get them done efficiently and cheaply.

DIY spot welder
Microwave Oven Transformer, Via: boccelliengineering

20. Spot Welder With Automatic Circuit

Spot welding is safer and more efficient than other types of welding and an automatic circuit will keep the welding going on for longer periods of time. These free building plans by electroniclinic will show all the steps for building a homemade spot welder.

Spot welding is typically used when a single layer of wire mesh needs to be joined to itself, like in gaskets, mesh screens, or overlapping metal seams. There are many uses for a DIY spot welder in a home work shop.

The thing that makes spot welding so desirable to home hobbyists and crafters is that a large amount of energy can be delivered to one spot in a very short time. Spot welding is quick, efficient, and ensures a strong, fused joint.

Building a DIY spot welder will also save you a lot of money. One of the least expensive ones that you can buy will cost $50, and that is a mini spot welder. You can build one that is larger and cost less. Check out these free plans and build one for your work shop.

Spot Welder With Automatic Circuit
Spot Welder With Automatic Circuit, Image via: electroniclinic

21. Portable Spot Welder

Sometimes the welder needs to go to the DIY project and this portable spot welder will go wherever you need it to go.

These free plans will show you how to build a high capacity spot welder by elektormagazine that has a super capacitor that can generate between 200A to 400A current. This one also has a dual pulse which is powerful enough to create a solid union of two or more metal components.

Take this portable spot welder outside to the car you’re restoring or to the metal patio furniture you are repairing. it will go with you to get the welding job done.

This portable model will be able to handle a lot of welds before it gets hot. Just wait for a few minutes so it can cool down and then you can resume welding. This is a handy little DIY battery spot welder to have for use around the house. It’s small and lightweight but powerful enough to get the welding job done.

Portable Spot Welder
Portable Spot Welder, Image Via: elektormagazine

22. Homemade Spot Welder

If you enjoy crafting with metal and creating unique objects, a homemade spot welder like this one by Sorin – DIY Electrical Nerd on Youtube will be a great asset to you.

Watch this YouTube video for detailed instructions on how to make a spot welder that is cheap and easy to make. This DIY spot welder is powerful and portable, so it’s able to handle all your metal crafting both at home and on the go.

You don’t need special skills to be able to use a spot welder and the welds will be strong. Think about all the things you could do if you only had a welder, then build this cheap and easy DIY spot welder and get busy.

You will be able to create new metal objects or repair broken metal items with this spot welder.

23. Battery Spot Welder

This is a great tool to have in your home workshop, plus it’s cheap and easy to make. This DIY battery spot welder is powerful and will create strong welds in about half the time of a regular welder.

This homemade battery welder by instructables would be perfect for use in a workshop that is off-grid since electricity is not needed to use the welder. You will be able to weld iron, steel, and stainless steel sheets up to the thickness of 0.1-0 with this battery spot welder.

Join thin metal components together with a strong weld created by a small homemade spot welder like this one. It’s portable and can be used anywhere on or off your homestead since it is powered by batteries.

Think of all the projects you could get done around your homestead if you only had a spot welder. These detailed plans are free and will show you how to build a DIY spot welder that you will use for years.

Battery Spot Welder
Battery Spot Welder, Image via: instructables

24. DIY Spot Welder 

Here is a spot welder that you can build without a microcontroller. By not having to include a microcontroller you will save money and time.

This DIY spot welder by hackster without a microcontroller will work just as well as other spot welders to create a strong union between two pieces of metal. It is quick, easy and cheap to build and will last for years. The homemade welder is small and portable so it can be used in your home workshop or outside. Wherever a welding task is needed to be done, this spot welder can get the job done.

These free plans provide detailed instructions along with pictures so you will be able to easily build a DIY spot welder for yourself.

DIY Spot Welder
Homemade spot welder you can build without a microcontroller, By hackster

25. High-Voltage Capacitor

This DIY spot welder by Maciej Nowak Projects on youtube is powered by 220 volts of electricity and will create strong, long lasting welds. Create sturdy unions between metal, iron, or steel so you can fabricate something new.

Consider all the things you could fabricate if you had a high voltage capacitor spot welder like this one. You could build useful things around the homestead and/or create metal items to sell and generate a source of income.

Welding is also a high paying job and if you have a spot welder, you could go where welding services are needed and generate income. It is always great when you have a tool and skills that will enable you to earn money. This DIY spot welder is easy and cheap to make so your investment will be small but the earning potential is big.

These free plans include both a video and written instructions so you will be able to build this spot welder without any problems.

Spot welding is an easy skill to learn even if you have never welded before. It is one of the  oldest forms of welding and is used in the automotive industry and the home work shop and everywhere in between.

26. Lithium Ion Battery Spot Welder

No electricity is needed to use this homemade spot welder by extremediy. This powerful little welder is powered by a lithium ion battery and can go wherever spot welding is needed.

Ideal for an off grid homestead or work shop. It is also great to outdoors where metal fabricating or repairs are needed. The uses for this homemade battery welder are limitless and it is a must-have for any homesteader.

A battery from a car or lawn mower will generate plenty of power for this DIY spot welder. Joining two pieces of metal together with a spot weld is quick and efficient. The union will create a strong bond between the metals that will last indefinitely.

Spot welding does not create an open flame and it does not require any type of special skills to do. These free plans will show you how to build a DIY battery spot welder that is easy and cheap to make and easy to use.

Lithium Ion Battery Spot Welder
Lithium Ion Battery Spot Welder, Image via: extremediy

27. Recycled Microwave Oven Transformer

Again we have a great idea for building a homemade spot welder using recycled parts. These free plans by instructables will show you how to build a useful tool from something that is no longer useful, like an old microwave oven.

Most microwave ovens have tempered glass door fronts and interior turn tables but oftentimes these glass components get broken. The rest of the microwave oven, including the transformer, is still good and should be recycled. These free plans will show you how to remove the microwave’s transformer and recycle it into a component of a DIY spot welder.

If you have a few broken metal items around the house or if you would like to build some metal items, a spot welder is a tool that you need. To buy one in the store will cost a few hundred dollars but building a DIY spot welder is cheap and easy.

These free plans include both written and video instructions for the DIY project. This homemade spot welder operates on 110 electrical currents and is small enough to be portable. You will be able to repair and fabricate for yourself and others with this easy to build spot welder.

homemade spot welder
homemade spot welder, Image Via: instructables


Do all your household repairs such as microwave, metal stool, furniture and small kitchen appliances without hard and costly welding working with these easy to make diy spot welders that we have gathered for you. You can save a large sum of money without the need to call a professional and do little repairs when you can do it yourself. Hope these ideas we shared with you have given you some thoughts on how to make your own spot welders.

To answer some common questions that come to your mind I have prepared a questionnaire.  


What voltage and current is required for spot welding?

For welding of thin material you need to set the voltage at least 12V with a current supply of 1000A. Thick materials are welded with a high voltage above 12V. However you must be aware that working with high current can be dangerous and all precautions should be taken to ensure safety.

Difference Between Spot Welding and Soldering?

A spot welding is used to join two pieces of metal by making a solid and strong bond while the soldier joins two pieces of electronic components with a lighter bond.

Does spot welder use AC or DC?

Spot welding is done using Ac power that provides low voltage with a high volume of current. A transformer is used to set a voltage of 5V to 22V with a current of 1000 to 10000A.

What metals can not be spot welded?

Generally all the metals can be spot welded except copper, silver, lead, zinc and Manganese.


Science direct, Spot welding ,”Proceedings of the 1st International Joint Symposium on Joining and Welding, 2013″, https://www.sciencedirect.com/topics/engineering/spot-welding

UK Essays, Subject: Engineering, Published: 6th Sep 2021, “The Three Stage Process of Spot Welding” https://www.ukessays.com/essays/engineering/spot-welding-involves-three-stages-engineering-essay.php

Universal Technical Institute, Pub, Feb 20, 2023, “Spot Welding & How It Works”, https://www.uti.edu/blog/welding/spot-welding

About Farhan Ahsan

My name is Farhan Ahsan,I am web enthusiast, writer and blogger. I always strive to be passionate about my work. I started my work at the beginning of 2007 by engaging myself with detail reading and exchanging information with others. Since then things and times have changed, but one thing remains the same and that is my passion for helping and educating people, building a successful blog and delivering quality content to the readers. I always love to write about gardening, sustainable life, off grid living and homestead farming.

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