We are slowly and painfully making progress with learning to fly our 3D Printed Mini Quadcopters. Cliff has helped us out with some tweaks & balances. Hopefully some more members will be interested in building their own, and will help add to the swarm.

Recently Ben, Cliff and Claudio have built Diametric’s Mini Quadcopter. We met a fellow RepRap user- Diametric- at this years Midwest RepRap Festival in Elkhart Indiana. He brought along a 3D printed quadcopter that he designed and built.

The quadcopters are remarkably inexpensive, the design, models and bill of materials can be found on Thingiverse. They are easy to build and easy to get off the ground. We’re still learning how to fly them however. While all three have taken flight, we have had some accidents and damaged the frames on 2 of them, twice. We’re not too worried when that happens, for we can always reprint the frame within about an hour and a half on one of our 3D printers.

Building the quadcopters

Claudio’s Quadcopter

Cliff’s Quadcopter

Claudio’s Second Quadcopter

Ben’s Second Quadcopter

Ben’s Quadcopter- We are still learning…

My wife and I will shortly be moving into a new house. This house has nice side section on the side that is fenced off and I think will make a good vegetable garden, so I figured I’d keep a project log.
There are a couple of facts I need to make the reader aware of
1) Here is how this area looks now:

As you can see, it has been pretty neglected and left to run to seed.
2) The closest I have ever been to growing things has involved an animal-shaped pottery and some slimy seeds (http://www.chiapet.com/index.php/original-chia-pet). Since when it comes to growing things I am a complete dummy, it should come as no surprise that I will be using this book:

To guide me along.
My ultimate goal when finished is to have a garden of different types of vegetables (and maybe some fruit here and there) to supplement our groceries, help us eat healthier and make things more convenient than having to run to the store all the time for different items.

Its as good as walking into a clinic and getting some physical therapy, seriously its that good and no im not joking its amazing. Not kidding its one of the best thing I have ever done in my life. Getting physical therapy is something that I have wanted to do for a long time but just couldnt afford, and better yet going out and getting something like IV therapy Scottsdale is a dream for me but eating healthy is gonna have to do for now!

The first step (and most likely the hardest) is clearing out this area. Complicating things is that there is no telling what is hidden in the overgrowth, so until I clear the space out I will list the “treasure” I find each day.

DAY 1
TOOLS:
1 Gardening hoe (no jokes!)
1 Garden Fork
Based on the images above, I made the assumption that everything was dirt from the shed to the far fence. However, once I started, this is what I found instead:

Bricks and paving stones!

It might be hard to see above, but click the image to see the large size – there are bricks and paving stones covering much that area. So, I will need to pull most of these up before I start planting. I will probably leave a small area for a path and place to put a small table and chair under the awning.
Even with the little surprise, I was able to accomplish what I planned for today – I cleared as much of the overgrowth from the fenced in section as I could and enough on the other side to allow both gates to open and close freely.
GOAL: Clear out fenced in section of overgrowth
Status: Mostly Complete, with a surprise!
Treasure: A 5ft long post hole digger(handles intact and metal in excellent shape), bricks/paving stones, a decomposing Croc, and some empty aluminum cans, vintage indeterminate
OTHER THOUGHTS: I should have brought a large blade straight edged and a curved edge shovel and a couple of shears/loppers of various sizes. Those will be included next time as I go to work on the saplings and brush that has sprung up in and around this section of the garden.

Recently Roy and I set out to build set out to build a better headphone amplifier for our higher end Sennheiser headphones. A headphone amp simply boosts the power to the headphones a bit, this results in better sound on the bigger headphones. The design is built around a know design over at Diy Audio Projects. It is a Class A amplifier with a 12AU7 tube. We ended up puting a spin on the project and added a PCM2704 USB DAC (sound card). Sweet glowing tube action pictures are below.

Populating the board

Fully Populated

All soldered up.

Back of Amp

Front of Amp

Amplifier board hung.

Blown apart

Amp Running

I have a badger-hair shaving brush that I’d like to keep for a while. I’ve read that the brush will last longer if it’s allowed to hang and dry versus being left sitting in the lather bowl. After looking around for a hanging stand I decided to make my own, that works for brushing to so you don’t have to keep thinking if brushing vs combing is the best way to go. My first model took over 6 hours to print at 60mm/sec.

 It turns out I made the model quite a bit larger than necessary. After placing the brush and the razor on the stand, all the extra unused space is really evident.

I decided to see how much time and material I could save on my next model so I tried to use circles and ellipses to minimize the printed area while still leaving enough structure. The new model has a hanger for the razor and a slot with drain holes for the extra razor blades.

This model printed much faster, it only took around two and a half hours at 60mm/sec.

The stand works well enough, but I’m not happy with how tall and light it is, it’s too easy to knock over early in the morning.

For the next iteration, I’m going to flare out the base a bit to prevent tipping and may increase the amount of material towards the bottom of the model. The blade storage slot needs to be deeper as well.