JuanGg Projects

This is a working, 160 mm diameter BB-8 model. The whole thing is 3d printed, including the ball. It uses a counterwheight to drive itself fowards and backwards, and as a "momemtum wheel" to steer. It is driven by two standad sized servos modified for continuous rotation, and one micro servo for the head, which is held in place using magnets. An arduino nano, conected to a motor controller and a bluetooth module acts as its brain. Later on I plan to add an IMU (Inertia Measurement Unit) to increase stability and a sound module to play some sounds. The ball got some drawings and I paint job, but I can't find more photographs at the moment. Instructions and files here:  https://www.thingiverse.com/thing:1376731   Head files are from the BB-8 builders club, scaled down.

A few years ago I bought an rc quadcopter kit from hobbyking. It was somehow difficult to configure and I am not such a great pilot, so I broke the frame that came with it -which by the way was't particularly strong-. I saw a frame that suited my needs on thingiverse ( https://www.thingiverse.com/thing:34552 )and printed it with a few modifications, and added some "landing legs". Now it is much stronger and if it breaks I can just print  a new one.

Just a simple benchtop power supply using one ATX from an old computer. It has 3.3v, 5v and 12v outputs on banana conectors, a main fuse and a voltmeter/ammeter module. I used a plastic case I had around and I 3d printed a lid with all the appropriate holes. Comes in handy to power projects without relying on batteries.

. Trying to fix the ballast tank isues, I attempted a 'surgery'. A hole in the ballast tank was made to put some bulkheads in, see the photos: Hole shape marked. Had to go through 6-8 layers of paint to reach the metal! After cutting it. Notice the existing bafles, wich were there to prevent the tank from deforming under presure, but do not prevent water to move around. The inside, closer. You can see steel powder from the cut. Everything was painted with minium /red lead paint. Had been 2 years closed, not smelling good. Paint was removed using a metal brush, with a mask as I don´t think swallowing minium powder is good for health. Paint almost completely removed and 3d printed bulkheads trimed to fit: Now we have four independent compartments. The bulkheads will be epoxy glued to the inside of the tank, and then everything will be painted. Hole will be closed gluing another steel sheet to the underside of the tank. I am not really sure if epoxy wi...

I am going to describe a project that I started in 2015 and needs some modifications to be done for it to work properly. I would be proud to hear sugestions! This is a radio-controlled model submarine. It is 1.06 m long and it is based on the german U-boots operational during WWII. The main objectives were: -Low cost : For now it is below 240 € without radio equipment (+- 150 €) -Simple hull, made out of wood (later discovered that this was not the best material for underwater stuff!) -Static diving -At least one hour of battery. -Operating foward dive planes and twin ruders (only four chanels, so no rear planes). -Similar to an Type IXB german U Boot. First stages from the build, as you can see, simple , square-shaped hull: Water tight compartment. Policarbonate sheet cut and drilled to form the acess hatch. Hull construction, simple shapes, cheap and "easy". Fore. Aft. After foward and rear planes had been fitted, rudder assembl...