250 Slim Quadcopter

1 - Finished and Air-worthy

The goal is to build a super thin 250 size quad that will be used as a test platform for trying new parts and different firmwares / features.

To try and cut the size down and keep things tidy i made my own double afro 12a esc’s.
3 - DIY dual afro 12a esc

Esc’s flashed to BL heli and i would recommend this to anyone using afro esc. The tool is cheap, its super easy and it makes so much difference. running oneshot125 with damped-light. Ability to reverse motor output makes wiring much tidier.
4 - BL HELI

yep. it fits the trusty ZMR 250 frame.
5 - Testing Fit

FC and top plate in place
6 - FC and top plate in place

Just had to add radio gear and motors after this and was ready to fly.
1 - Finished and Air-worthy

its verry light, at least till i find some suitable FPV for it. Currently at 260 Grams plus battery, frame is only 14mm high and uses 8mm spacers.

This was built as a prototype using some old parts. its not high spec and i realise i could remove a lot of weight by removing bullet connectors but it’s a testbed. made for trying things, tinkering and swapping parts in and out.

It’s surprisingly quiet and i heard that these motors can have a good amount of thrust with a 6″ prop (when some arrive).

Planned Final Configuration:
Plan is to use a micro fpv cam and mount it on the space at the front of the mobius next to the main lens.
2 - Planned Final Configuration

Quadcopter Hyperlapse V2

Hyperlapse style video of a Quadcopter flight recorded with only a mobius action-cam.

The video is 6x faster than the original footage and has been De-fisheyed. To keep the video smooth it was run through through “deshaker” plugin for virtual dub before speeding it up. The output was rendered at 1080P 60FPS resulting in a 33GB uncompressed file with 360MB/s data rate.

The artifacts and borders at points in the video are a result of the warping that occurs during smoothing of the original video. some of the borders are then filled with image data from past and future frames by deshaker.

Due to the increased speed the original audio could not be used so was removed. I replaced this with YouTube music but its not great so feel free to mute.

Virtual retinal display

IMG_20150120_205652

Built a retinal projector last night just for fun (and because i was curious what kind of image quality could be achieved).

WARNING : DONT DO THIS UNLESS YOU KNOW WHAT YOU ARE DOING. SHINING LIGHT INTO YOUR EYES CAN BE SERIOUSLY DANGEROUS. DO YOUR RESEARCH BEFORE TRYING ANYTHING LIKE THIS.

Notes:
Works Well, Produces a crystal clear image straight into your eyeball. unfortunately it seems that the alignment of everything and positioning of the eye needs to be to accurate for any practical use. The plan was to come up with a setup allowing us to make some kind of FPV goggles with this however without a lot of work this will not be stable enough on your head to remain reliable. the focal point must pass through your iris so a few mm of movement will cause you to loose the picture.

How It Works:
Image is produced by the Pico Projector. it passes through a variable ND Filter made of 2 linear polarising lenses, passes through the glass, reflects off the concave internal side of the magnifier (for refocusing) before finally reflecting off the glass slide and into the users eye (placed above).

IMG_20150120_205652

250 Quadcopter

01 - ZMR250 So Tidy

after recently building my first 250 sized FPV quadcopter i decided it was time to add some FPV gear. As i was rebuilding, i might as well upgrade the frame and have a tidy at the same time. Results below.
12 - Side Finished

Before FPV and New Frame.
02 - HK250

Old Mess.
04 - Oh god the wires

New Parts : ZMR250 frame (Real Carbon Fiber), Cobra 2204 2300Kv motors, and other parts taken from the HK250
05 - New Parts

ESC’s stripped,
2mm bullet connectors removed,
motor cables braided,
motors connected and directions tested.
06 - Laying out parts

Power cables finalised,
ESC’s re heat-shrunk,
07 - Under fame complete

Naze, receiver, Fpv cam and video TX all placed and wired in.
10 - Big TIFU Moment

At this point I went for a full system power up test, the first since completing wireing ESC’s. At this point every single component is connected to the main battery connector for power.

The keen eyed amongst you will have noticed that the XT60 in this picture is wired backwards. I quickly realised this as I connected my 2200mAh nanotech. There was a huge spark and a lot of smoke. Suddenly that sinking feeling.

At this point I realised that there was a large possibility that I may have KILLED EVERYTHING. I quickly unplugged everything and reversed the connector. I then began plugging components in one by one to see what was left. I have never been so happy to hear my ESC’s arming. Same with Naze connecting to cleanflight, then video came back.

For some reason it seams that the gods took pity on me and remarkably everything survived. I don’t know how but im not complaining. Could easily have been a very expensive mistake and all the previous time spent rebuilding would have been waited.

The lesson here, DOUBLE CHECK EVERYTHING, also TEST COMPONENTS ONE AT A TIME !

Finished Result:
11 - Front Finished

Im pleased with how this turned out. Far more manageable than before. Next job : Adding Led’s, however this can wait till another day.
01 - ZMR250 So Tidy

425 grams all in without battery as before. 50 grams lighter and a lot more power. To reduce weight more in future I may swap to a smaller FPV cam and reduce the red stand-off’s bringing the top plate down to just above the receiver. could also swap to nylon hardware but im not sure its necessary.
13 - Weight

Hexapod Update

So the new Hexapod hardware has been in use for a few weeks now. Thought you guys deserved some pictures of it assembled.

The hardware has bump stops so that it does not damage servos when in a closed position.
HexapodClosedUp

Normal standing stance.
IMG_20140323_203945

Head-on tilted forward.
Hexapod Front

Stance used when manipulating objects, standing on 4 legs, weight shifted backwards.
2014-03-24

And some more artistic photos . . . .
Dynamixel Box 2
Hexapod Hat

My First Brushless

For a future project I need to build a completely waterproof brushless motor. Before I start at the deep-end I decided it would be best to make a smaller motor to get a better understanding of how brushless motors work. I ordered a few stators and a kit from gobrushless.com.First Phase Finished

The motor has a 9 pole stator (3 poles per phase, 3 phases) and 12 neodymium magnets in the outer ring.

Second Phase Finished

I wound each phase a different colour so that it was easier to follow what I was doing. the phases are joined together in the wye winding style.

Finished Winding and Assembled

Now to test it out:

Science with denim

So this morning I was casually browsing the Epilog (laser cutter) website when I stumbled accost a testimonial that said “We have engraved everything from denim to acrylic with fantastic results”.

I was instantly intrigued. The idea of being able to easily make professional looking custom clothing is amazing. I quickly grabbed the closest pair of good jeans plus an old ripped pair to test on.

Whilst looking for a simple pattern to etch I remembered these designs by mattcantdraw.

With a little rearranging these designs were perfect. I did some tests on an old pair of jeans to find the right power level as I could not find any settings for this online. I started using the same setting that would be used to etch leather however quickly found that this was to powerful and made the material break apart easily. I finally settled on 100% speed 15% power on a 75Watt laser.

IMG_20140223_180127

I had some trouble fitting the jeans into the cutting bed and found that things had to sit flat so that I did not obstruct the gantry or cutting head.

IMG_20140223_180135

I’m actually very pleased with how this turned out, the effect produced looks like natural fade, but only in specific areas. I love that these jeans have gone from boring ‘off the shelf’ to something interesting and individual. From now on I will be keeping a look out for other designs that would work like this.

Follow

Get every new post delivered to your Inbox.

Join 357 other followers