Search found 139 matches
- Sun Feb 01, 2015 10:34 am
- Forum: Projects
- Topic: Weather Station
- Replies: 12
- Views: 10441
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) ...
- Fri Jan 30, 2015 6:05 pm
- Forum: Projects
- Topic: Weather Station
- Replies: 12
- Views: 10441
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...
- Thu Jan 29, 2015 10:39 pm
- Forum: Projects
- Topic: Weather Station
- Replies: 12
- Views: 10441
Re: Weather Station
over 9600 baud I can run a DHT up to 250ms for both temp an humidity... not bad
- Wed Jan 28, 2015 1:46 pm
- Forum: Projects
- Topic: Weather Station
- Replies: 12
- Views: 10441
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...
- Tue Jan 27, 2015 5:55 pm
- Forum: Projects
- Topic: Weather Station
- Replies: 12
- Views: 10441
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...
- Mon Jan 26, 2015 10:30 am
- Forum: Projects
- Topic: Weather Station
- Replies: 12
- Views: 10441
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...
- Sun Jan 25, 2015 5:23 pm
- Forum: Projects
- Topic: Weather Station
- Replies: 12
- Views: 10441
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...
- Sat Jan 24, 2015 10:40 pm
- Forum: Projects
- Topic: Raspberry Pi GIS Tablet: GIS-Pi
- Replies: 44
- Views: 58035
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!
- Mon Jan 12, 2015 8:34 pm
- Forum: 3D Printing
- Topic: New Car Key
- Replies: 6
- Views: 10784
Re: New Car Key
In hindsight yes, but I epoxied the RFID and Key base into the shell.
- Sat Jan 10, 2015 5:59 pm
- Forum: 3D Printing
- Topic: New Car Key
- Replies: 6
- Views: 10784
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!
- Fri Jan 09, 2015 8:42 pm
- Forum: 3D Printing
- Topic: New Car Key
- Replies: 6
- Views: 10784
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
http://bjshed.better-than.tv/blog/?x=entry:entry141231-015955
- Thu Jan 08, 2015 11:47 pm
- Forum: General Discussion
- Topic: New phpBB I see :)
- Replies: 3
- Views: 5012
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
- Wed Jan 07, 2015 10:46 pm
- Forum: General Discussion
- Topic: New phpBB I see :)
- Replies: 3
- Views: 5012
New phpBB I see :)
Looks like someone upgraded something here...
- Tue Dec 02, 2014 6:03 pm
- Forum: General Discussion
- Topic: Perth Curtin Robofair - 2014
- Replies: 9
- Views: 9043
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...
- Mon Dec 01, 2014 7:52 pm
- Forum: General Discussion
- Topic: Perth Curtin Robofair - 2014
- Replies: 9
- Views: 9043
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
Here is the timelapse of our area using the timelapse pi powered rig!
http://youtu.be/PekDgzH8KTA
- Mon Nov 24, 2014 9:37 pm
- Forum: General Discussion
- Topic: Perth Curtin Robofair - 2014
- Replies: 9
- Views: 9043
Re: Perth Curtin Robofair - 2014
Have you guys still got the templates for the name tags?
- Thu Nov 13, 2014 7:06 am
- Forum: Raspberry Pi
- Topic: Raspi TFT
- Replies: 18
- Views: 53058
Re: Raspi TFT
Hi Dylan,
Have you got a B+ Pi ? I hear they need a tweak because of their different USB arrangement?
Have you got a B+ Pi ? I hear they need a tweak because of their different USB arrangement?
- Thu Nov 13, 2014 6:51 am
- Forum: Projects
- Topic: My Z80 Computer build
- Replies: 14
- Views: 13568
Re: My Z80 Computer build
Using the atmel as a clock source sounds like the go!
- Wed Nov 12, 2014 8:58 pm
- Forum: Projects
- Topic: My Z80 Computer build
- Replies: 14
- Views: 13568
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...
- Tue Oct 28, 2014 5:54 pm
- Forum: General Discussion
- Topic: ShellShock
- Replies: 3
- Views: 4172
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.....