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Skateboards are fun, but you have to do all that pesky kicking in order to get anywhere. That’s why [Nick] decided to build his own electric skateboard. Not only is the skateboard powered with an electric motor, but the whole thing can be controlled from a smart phone.

[Nick] started out with a long board deck that he had made years ago. After cleaning it up and re-finishing it, the board was ready for some wheels. [Nick] used a kit he found online that came with the trucks, wheels, and a belt. The trucks have a motor mount welded in place already. [Nick] used a Turnigy SK3 192KV electric motor to drive the wheels. He also used a Turnigy electronic speed controller to make sure he could vary the speed of the board while riding.

Next [Nick] needed some interface between a smart phone and the motor controller. He chose to use an Arduino Nano hooked up to a Bluetooth module. The Nano was able to directly drive the motor controller, and the Bluetooth module made it easy to sync up to a mobile phone. The Android app was written using MIT’s App Inventor software. It allows for basic control over the motor speed so you can cruise in style. Check out the video below for a slide show and some demonstration clips.

It’s a popular project, and eerily similar to the one we saw a couple months back.

Filed under: Arduino Hacks

Marinize an aero ESC with a TicTac box some epoxy Aluminium tube and hot glue

catamaran, esc, jet drive, marine, scratch build, tunnel hull Commenti disabilitati su Marinize an aero ESC with a TicTac box some epoxy Aluminium tube and hot glue 

Marinize an aero ESC with a TicTac box some epoxy Aluminium tube and hot glue

Hobbyking SS Series 60-70A ESC

The Hobbyking SS series comes with a limited range of programming functions and are designed to be plug-n-play.
A perfect ESC for those looking for something simple to use and economic.

Weight: 63g
Size: 55x35x8mm
Cells: 12-24Ni MH ~ 4-8S Li Po
Max Current: 60A
Burst : 70A
Timing: 1/7/15/30 programmable
PWM: 8/16K
Constant current 60A Max 70A
Li-Poly 4-8 cells
Low Resistant 0.0017 Ohms;
Dynamic Braking
BEC: opto
Auto shut down when lose signal
Slow down at 3.0V per cell Lipo, Cut-off at 2.9V per cell Lipo 0.8V NiMh
User Programming options.Battery setting
Throttle Range
Brake setting 4 options: Direction and Cutoff Type
Timing Mode Setting: 1 / 7 / 15 / 30
PWM setting: 8K/16K

Marinize an aero ESC with a TicTac box some epoxy Aluminium tube and hot glue. A nice water tank directly on the heatsink over the FET's lots of volume flow seems more than adequate  Its epoxied on with hot glue over that to seal any holes.

My plan is to use this ESC on theis motor

It don't have much specification on HK's site but my understanding is it a 
2185KV 28mm diameter ,33mm length with a 3.17mm shaft weight 230g  I got the 32 mm prop too.

Looks like a nice quality device seems to have great reviews on HK's site

 Its air tight and if it get hot enough to melt the hot glue its probably toast in any case


Some Thoughts on Integrating my Raspberry Pi

ardruino, esc, Raspberry Pi, servo, xBee Commenti disabilitati su Some Thoughts on Integrating my Raspberry Pi 

Got to get the Pi going soon

I once worked on an IDU for a helicopter so I'm thinking along those lines for the interface

The Pi can run the display which I have I want to find a way to piping video to the display in real time and overlaying all the symbols and controls depending on mode


500mm Foam Polyhedral Bi Plane

2150kv, biplane, christmas, esc, foam, scratch build, servo, xmas Commenti disabilitati su 500mm Foam Polyhedral Bi Plane 

My 500 mm Foam Bi Plane Christmas day 2012 Le Bons bay New Zealand
Took the camera off after this flight as its 19 Grams to much for the tiny bi-plane.

Scratch built for Xmas day. It was fun little plane for the day. It was a bit windy for it so without ailerons a few crashes, nothing that couldn't be taped up however until the ESC caught fire :)

Span 550mm with flip ups
Airframe weight 74 Grams Extruded Polystyrene and Bamboo 
Batts 52 Grams 180mAh Nano Tech's
Motor and prop 52 Grams
RX 10 Grams
ESC 9 Grams eith wires and connector Hobbyking SS Series 8-10A
2 X 6 Gram servos
AUW 209 Grams
Wing loading around 11 Oz/ft² assuming you count both wings as wing area for a bi-plane. Some say the effective wing area is 75% of the total giving around 15 Oz/ft²
Rudder and elevator (no ailerons which was s shame) 

Lots of lift from chunky wings, its over powered with a 44 gram AXN-2208-2150 2150kv you could induce a roll with the throttle. The polyhedral flip ups were not big enough I suspect, and it was windy but is flew Ok, the beach is a good place to crash, landed in a tree at one point the big motor kicked her free however. 

Getting some Hextronic 24 Gram 1500kv for these smaller models as recommended by 

Getting into flextures, not enough flextures ind RC models in my opinion. They work well and don't backdrive the servos like metal wire, fine on these tiny planes. 

Note the bamboo push rods, which weigh nothing.

Cooked the ESC by the end of the session as the two 180mAh Nano Tech's ran dry I taped on a 1300mAh, to heavy to many amps.

Might build a little plane like this for indoors with a tiny motor  like a C10 2900kv which is around 8 Grams .

Indoor foamy spec
Yank and bank bi-plane 50 Watts should get around 150 - 200 Grams of thrust so plenty 

Air frame 60 grams 
50 Watt Motor  C10 Micro brushless outrunner 2900kv  and 4.75 x 4.75 prop 12 Grams
Battery Turnigy nano-tech 460mah 2S 25~40C Lipo Pack 33 Grams
ESC wires ect Hobbyking SS Series 8-10A ESC 9 Grams
AUW 134 Grams

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