Build a 1000W Battery Spot Welder Using a Microwave Transformer | Step-by-Step Guide

Go with PCBgogo today and get a $50 coupon as a registered customer. They are offering an additional $50 coupon for all customers until the end of the year 2021. Register and get your coupons: https://www.pcbgogo.com/promo/MaxImagination Website: https://www.pcbgogo.com/ -------------------------------------------- Hey! Want to make some kind of large battery pack for a project and don't want to have to purchase one of those expensive Spot welders? Well, you're at the right place! Make a DIY Spot Welding Machine for dirt cheap - next to nothing! Just grab your tools, some scrap parts, a broken microwave oven and let's build! This 1000-Watt Spot Welding Machine produces an open-circuit voltage as low as 2.2V at 450 Amps, when welding (in short-circuit) the voltage drops to about half of that or even less with a current as high as 900-1200A. If you enjoyed watching this video or found it informative, please consider leaving a thumbs up, share, comment, and subscription to the channel! :) 👕 Grab my exclusive Merch here! - https://max-imagination-merch.printify.me/products ---------------------------------------------------------------------- 👉 Visit my online Storefront: https://sites.google.com/view/maximagination-workshop/ ---------------------------------------------------------------------- ☕ Buy me a coffee: https://www.buymeacoffee.com/MaxImagination ---------------------------------------------------------------------- Instagram: @max.imagination - https://www.instagram.com/max.imagination/?hl=en Instructables page: https://www.instructables.com/member/Max%20Imagination/ ---------------------------------------------------------------------- Disclaimer: Amazon purchase links below are affiliate links. It doesn't cost you extra to buy through those and I just get a tiny commission. Thank you! Circuit diagram - Spot Welding Machine: https://drive.google.com/file/d/1ql00_u0Mn5TzKNr5tplSysop932iM270/view?usp=sharing Materials/parts needed for this project: Microwave Oven Transformer (MOT) Microwave Oven (AC powered) Cooling fan 15A Momentary Push switch - https://amzn.to/3eaq8IO 15A On/off toggle switch - https://amzn.to/3T4iApy 10-15A Fuse - https://amzn.to/3rBIsNX 1M of 4AWG Enameled copper welding wire (a.k.a battery wire) - https://amzn.to/3CEQhc7 Electrical wire (12-16AWG) - https://amzn.to/3Ma3L2F 120V 3-wire cable - https://amzn.to/3MecGzV 3mm exposed solid copper wire (spot welder tips) - https://amzn.to/3eaCnFd UPS Inverter Metal cover/case (A plastic or wooden enlosure can do fine) 1x1" Square stick of wood Retraction spring - https://amzn.to/3MecUHh Mini door hinge - https://amzn.to/3ecwffv (x2) Shortened bolts - https://amzn.to/3edoB4A Zip ties - https://amzn.to/3EnWs5C PVC-foam gripped handle Wooden "Cement Float" Handle Spray paint - https://amzn.to/3ynQQEC Nickel strips for spot welding 18650-type Li-Ion batteries together - https://amzn.to/3RXgZBf 18650 cells - https://amzn.to/3QKafro 🪛🔧🔨 Tools and extra supplies I use: ➡️ Soldering Iron Kit - https://amzn.to/3X6L5Wq ➡️ Hot Glue Gun - https://amzn.to/3E6trJG ➡️ Drill Machine - https://amzn.to/3EDe0u8 ➡️ Box cutter/Utility knife - https://amzn.to/3hP9MGI ➡️ X-Acto Hobby Knife - https://amzn.to/3XbL7ML ➡️ Cutting Matt (Green) - https://amzn.to/3gil71A ➡️ Needle-nose Pliers - https://amzn.to/3ECTKc3 ➡️ Wire Cutters for Electronics - https://amzn.to/3ECut1B ➡️ Wire-stripping tool (Automatic) - https://amzn.to/3hQsMVD ➡️ Screwdriver kit - https://amzn.to/3V6vgNX ➡️ Heat-shrink Tube Kit - https://amzn.to/3AksTPE ➡️ Jumper Wire Kit - https://amzn.to/3UGhMZq ➡️ Breadboard for Prototyping - https://amzn.to/3GlF4ze ➡️ Perf Boards, Pin headers, and Connectors Kit - https://amzn.to/3AkySUw ➡️ Superglue - https://amzn.to/3EE6uis ➡️ Duct Tape - https://amzn.to/3g5mTU0 ➡️ Double-sided Tape - https://amzn.to/3Edta82 ➡️ Kapton Tape (for battery leads) - https://amzn.to/3X58bNl Music credits: CHRIS HAYES MUSIC - CHILL TRAP BEAT | No Copyright Trap Free Download Link http://bit.ly/36SP39M #spotwelder #diyspotwelder #batteryspotwelder