Tag Archives: Buzz box

Adding a current limiter to my MOT welder

Last year I built myself a welder using microwave oven transformers; I used it for a variety of things, but it was far from finished. Recently I’ve done some work to finish off the main transformers and to add a current limiting feature.
Improved welder Continue reading

Brother-proofing a christmas card

When we were younger, my brother and I had a game of ‘brother-proofing’ each others cards; this consisted of covering the envelope with as much tape as we could before we were told off for wasting it. This year I decided to revive this game; on Christmas day I presented my brother with his card:
A cuboid shape covered in parcel tape Continue reading

Building an arc welder from microwave oven transformers

I’ve spent the last couple of weeks building an arc welder by winding new secondaries onto two microwave oven transformers (MOTs). The one important lesson to learn from all of this is that high power transformers are not a place where the “fuck it that’ll do” method works; I wrecked a couple of primaries so ended up having to find fresh MOTs and start again. Continue reading