Makita 18V LXT powered 12V DC accessory socket

thingiverse

Makita 18V LXT battery powers a 12V 15A cigarette lighter type socket for use with accessories such as mini portable water pumps and kayak inflation blowers, etc. Although there are better sockets available, this one is commonly found on many portable items, making it the best choice for this project. The buck converter board from eBay provides an adjustable output voltage, which I set to 12.8V, delivering up to 15A of continuous power. To enhance heat dissipation, I removed the original finned heat sinks from the FETs and connected them directly to the aluminum infill panels using copper heat paths. So far, this arrangement has worked flawlessly without any issues. To ensure reliable operation, make sure the FET insulation boots are intact and not making contact with the aluminum. You might need to adjust the internal stand-offs to suit your board's specific requirements. The 12V socket from eBay is made of high-quality glass-filled nylon and features a robust design. To reduce the overall height of the completed package, I cut off the spade terminal connections and soldered them directly to the socket. A Makita OEM connector insert (part number 643852-2) was used, which can be obtained on eBay for approximately £4.50. This part is a crucial component in completing the project. The rocker switch operates on the main 18V supply from the battery and turns off the entire circuit board when activated. To secure the lid of the enclosure, stainless steel self-tappers are used, taking care not to over-tighten them to avoid damaging the uprights of the main body. The aluminum infill plates help resist the torque applied during tightening.