Feb
21
2014
0

Migrating to new server – again…

I’m in the middle of migrating to a new server.

If you have any problems on my site, please send an email to

Written by John in: Uncategorized |
Nov
01
2013
0

Now available in SSL

My website is now available over SSL by using the https:// prefix.

You will need to have the CAcert Root certificate installed – Follow the instructions here.

Once you’ve installed the CAcert Root certificate, click here to access the site securely.

Written by John in: General Randomness |
Jun
12
2013
0

Soldering ESCs

I’m using 30 Amp hobby King ESCs in my Quad Copter.

They each come with five bare ends which need connectors soldered to them.

Here’s a picture showing the result of about two hours of soldering and heat shrinking.

qc_escs

I’ve cut the DC power supply leads a little shorter so their length is perfect for my application.

Jun
10
2013
0

Fun with Loctite and Brushless Motors

It turns out four motors is four times the work of one… and four times the Loctite.

I’ve attached the spinners to the motors and the motors to the motor mounts using Loctite Threadlocker Red 271. This should stop any chance of the screws vibrating loose, but also has the downside of being very difficult to undo.

Overall, everything is starting to come together.

qc_motor

qc_arm

Jun
09
2013
1

Quadcopter frame assembled

I’ve finished assembling the Quadcopter frame. The instructions are a little cryptic and I have plenty of screws missing over, but I’m confident it will work.

hal_assembled

The build quality is reasonable for the price tag.

hal_assembled2

I’m still waiting on a number of other items to arrive before the main assembly can start.

Jun
05
2013
0

Quadcopter frame arrives

My Quadcopter frame arrived in the mail today.

It’s the Turnigy H.A.L Quadcopter from HobbyKing.

I hope to start assembling it over the next day.

Jun
04
2013
0

Autopilot parts arrive

The first package of parts for my Quadcopter have arrived.

I ordered these parts from 3D Robotics.

The picture is of the two Telemetry Transceivers, Power Module, Ardupilot Mega 2.5 and Ublox GPS

May
29
2013
0

Quadcopter Project

It’s been way too long since my last post – I’ve been busy looking after my bees, working on the house, doing development work and obviously, my day job.

I’ve taken the plunge and started to order the parts to build a fully Autonomous Quadcopter.

More posts will follow as parts arrive.

Apr
10
2013
0

Migrating to new server

I’m in the middle of migrating to a new server.

If you have any problems on my site, please send an email to

Written by John in: General Randomness |
Feb
13
2013
3

Update – Bosch BMP085 Source (Raspberry Pi)

I have updated my code to Read data from a Bosch BMP085 with a Raspberry Pi to correct some bugs reported back to me.

The main bug was that I’d forgotten to close the i2c file at the end of bmp085_ReadUP() – This shouldn’t have caused any problems if you were calling the function once per execution, but if calling it multiple times, it may crash. On the same note, if you are calling the functions multiple times, you may want to move the opening and closing of the i2c file outside of the functions so the files aren’t opened and closed multiple times. Thanks to Radu P for reporting these issues.

It looks like lm-sensors.org is back up now, but if not, you can find a locally hosted copy of smbus.c and smbus.h in this earlier blog post.

Note that I’ve written a number of posts on using this sensor. Here is a link to all posts on the topic.
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