JuanGg Projects

I had been wanting to build a CNC router/mill for a while, so finally on January 2021 I designed this contraption, with the help of the folks at cnczone . I originally wanted to go for an aluminum or even concrete frame, but as a first project and for ease of construction and economic reasons it ended up being wood. It is intended for cutting woods and plastics, and PCB milling. I'll try some alumi(ni)um when I'm familiar enough with feeds and speeds. I then proceeded to cut out all wooden pieces, finishing the edges with a hand-held router so that they were reasonably straight. When summer came and all parts (rails, leadscrews, steppers..) arrived, I began gluing all the pieces together and test-fiting parts. Areas where linear rails mounted were soaked in epoxy to protect the wood. Holes were drilled and tapped for the appropiate sizes, regular machine screws would latter hold things together, with some drops of wood glue to secure them semi-permanently in place. A workbench ...

  This is a lab power supply I put together back in 2018 with one DPS3005 module. It is easily the most used piece of equipment in the lab, so much that it is permanently on. The module itself is nothing but a DC-DC converter capable of 30 V and 5 A, providing a simple user interface, and isolated USB control (which I've never really needed). The output is pretty noisy as one might expect, see discussion  here . An LC filter reduced some of that noise significantly. I'll have to come back to it and re-do it with smd capacitors, yet I have no real need. My other lab supply  has way lower noise. I first used a cheap swithcing supply to power the module, but it lasted a mere week or so. I later substituted it for an unregulated dc supply using a transformer I bought at the local flea market. The case I made for it being wood, I added a small fan in the back. I quickly added a simple two-transistor temperature controller because of the noise. With all fans running (power supp...