Search found 139 matches

by BeJay
Sun Feb 01, 2015 10:34 am
Forum: Projects
Topic: Weather Station
Replies: 12
Views: 2005

Re: Weather Station

I'd rather not use wireless, as it uses extra power and I have plenty of cables run for just such a project I've decided to use Serial TTL pull down from the arduino's direct serial interface. It runs happily over CAT5e up to 200m which is perfect. Also because of it's pull down nature (5V nominal) ...
by BeJay
Fri Jan 30, 2015 6:05 pm
Forum: Projects
Topic: Weather Station
Replies: 12
Views: 2005

Re: Weather Station

More testing today... I2C seems to only go 6-8m unbuffered which is about right at 800 pF, and I2C only allows 400 pF to get the required edge speed. That blows that idea. Seems RS232 has a bit more going for it or 484 etc. The problem is it will require a MAX232 equiv at each node to communicate wi...
by BeJay
Thu Jan 29, 2015 10:39 pm
Forum: Projects
Topic: Weather Station
Replies: 12
Views: 2005

Re: Weather Station

over 9600 baud I can run a DHT up to 250ms for both temp an humidity... not bad ;)
by BeJay
Wed Jan 28, 2015 1:46 pm
Forum: Projects
Topic: Weather Station
Replies: 12
Views: 2005

Re: Weather Station

I tried an experiment to see how well the DHT22 was vs 2 x DS18b20.. There is a solid 0.3 degress in it over 21 - 38 degrees... These DHTs aren't too bad considering they do humidity as well! I'm getting around 0.45oC error between the 2 x DS18b20's so they are in spec for +/- 0.5oC http://bjshed.be...
by BeJay
Tue Jan 27, 2015 5:55 pm
Forum: Projects
Topic: Weather Station
Replies: 12
Views: 2005

Re: Weather Station

Could bring it into I2C, but I still need 2 interrupt driven inputs for rain and wind. I may end up using an arduino for that and outputting I2C to the RPi bus... I'll breadboard that and see if I can get an arduino to do that...
by BeJay
Mon Jan 26, 2015 10:30 am
Forum: Projects
Topic: Weather Station
Replies: 12
Views: 2005

Re: Weather Station

Yes I am currently using DS18B20's and picaxes pumping out rs232. I used the ol' crusty 9600baud because I have a rain water tank ~40m away and it works well on a CAT5 + power. The issue I suppose is that I need to have sensors all over the place that need to run on CAT5 back to the Pi for processin...
by BeJay
Sun Jan 25, 2015 5:23 pm
Forum: Projects
Topic: Weather Station
Replies: 12
Views: 2005

Weather Station

Hello Makers! I've decided to revisit my weather station / data acquisition setup, due to some house extensions happening later this year (hopefully?!) to allow for control of open-able skylights and louver windows which has made me think about the hodge podge setup I have now. At the moment i'm usi...
by BeJay
Sat Jan 24, 2015 10:40 pm
Forum: Projects
Topic: Raspberry Pi GIS Tablet: GIS-Pi
Replies: 44
Views: 7498

Re: Raspberry Pi GIS Tablet: GIS-Pi

Great work there Paul! I have been dabbling in Pygame for my latest project. It has a great feature set for anything graphical... More on that soon!
by BeJay
Mon Jan 12, 2015 8:34 pm
Forum: 3D Printing
Topic: New Car Key
Replies: 6
Views: 1551

Re: New Car Key

In hindsight yes, but I epoxied the RFID and Key base into the shell. :lol:
by BeJay
Sat Jan 10, 2015 5:59 pm
Forum: 3D Printing
Topic: New Car Key
Replies: 6
Views: 1551

Re: New Car Key

Yep well worth the effort, but I could have made it a little less "square" but I was on a time limit!
by BeJay
Fri Jan 09, 2015 8:42 pm
Forum: 3D Printing
Topic: New Car Key
Replies: 6
Views: 1551

New Car Key

I printed a new housing for our car key for those who haven't seen it:

http://bjshed.better-than.tv/blog/?x=entry:entry141231-015955
by BeJay
Thu Jan 08, 2015 11:47 pm
Forum: General Discussion
Topic: New phpBB I see :)
Replies: 3
Views: 1091

Re: New phpBB I see :)

Well I hadn't seen a new post since Dec 26, but it must have been a cache update that forced my browser to have another look...and viola ;)
by BeJay
Wed Jan 07, 2015 10:46 pm
Forum: General Discussion
Topic: New phpBB I see :)
Replies: 3
Views: 1091

New phpBB I see :)

Looks like someone upgraded something here...
by BeJay
Tue Dec 02, 2014 6:03 pm
Forum: General Discussion
Topic: Perth Curtin Robofair - 2014
Replies: 9
Views: 2074

Re: Perth Curtin Robofair - 2014

Hey Paul, I used a bit of software I wrote in gambas3 for Linux called TimeLapse Maker: http://bjblaster.homedns.org/projects/software/linux/TimelapseMaker/timelapse-maker.png It builds a list of files to use and then exports them to mencoder. Works a treat! I wrote it for my son who loves making st...
by BeJay
Mon Dec 01, 2014 7:52 pm
Forum: General Discussion
Topic: Perth Curtin Robofair - 2014
Replies: 9
Views: 2074

Re: Perth Curtin Robofair - 2014

Well that was a bit of fun! Wasn't a big turn out of makerspaces like last year, but still not bad ;)

Here is the timelapse of our area using the timelapse pi powered rig!

http://youtu.be/PekDgzH8KTA
by BeJay
Mon Nov 24, 2014 9:37 pm
Forum: General Discussion
Topic: Perth Curtin Robofair - 2014
Replies: 9
Views: 2074

Re: Perth Curtin Robofair - 2014

Have you guys still got the templates for the name tags?
by BeJay
Thu Nov 13, 2014 7:06 am
Forum: Raspberry Pi
Topic: Raspi TFT
Replies: 18
Views: 2859

Re: Raspi TFT

Hi Dylan,

Have you got a B+ Pi ? I hear they need a tweak because of their different USB arrangement?
by BeJay
Thu Nov 13, 2014 6:51 am
Forum: Projects
Topic: My Z80 Computer build
Replies: 14
Views: 2971

Re: My Z80 Computer build

Using the atmel as a clock source sounds like the go!
by BeJay
Wed Nov 12, 2014 8:58 pm
Forum: Projects
Topic: My Z80 Computer build
Replies: 14
Views: 2971

Re: My Z80 Computer build

Love your work Shane, This is quite neat indeed. Do you have any trouble getting the 2Mhz crystal to oscillate with just an inverter? I tried that years ago and couldn't get it to start every time without fail... I think it was the lack of capacitance to ground to get it running from memory Anyway r...
by BeJay
Tue Oct 28, 2014 5:54 pm
Forum: General Discussion
Topic: ShellShock
Replies: 3
Views: 843

Re: ShellShock

Yes it was patched in the latest Mavericks release, and of course the "all new" Yosemite. A quirky little bug that took a long time to patch. It really only affects web servers, but CUPS runs on port 631 on a MAC so was natively available as a web interface which was exploited early IIRC.....