PDA

View Full Version : Any interesting EXPO projects your willing to share or tease pictures of?



Beau Schwabe (Parallax)
04-09-2012, 06:41 AM
Here is a little something in the way of a sensor I'm putting together (See attached Image). Hopefully a version of this sensor will be on a Boe-Bot style robot. (Also Pictured)

Roy Eltham
04-09-2012, 08:02 AM
Beau,
Will that be aimed down at the ground? :)

JLocke
04-09-2012, 09:19 AM
Is that for navigating the Parallax mine field?

g3cwi
04-09-2012, 09:29 AM
Beau's coils have got me thinking. Has anyone made a magnetometer using the Prop - to monitor solar storms etc?

Regards

Richard

Rayman
04-09-2012, 12:49 PM
I recently decided that, since I was first to register for the LFO contest, I should actually build a robot for it...
So, I just started last Friday... Almost have the hardware put together. Hope to start the code work today...

It's the ArdBot chassis with a Quickstart and my Merlin plugin to drive the servo motors.
Also, using "magic sliders" instead of acorn nuts or casters wheels on front and back.
There's a chance this won't work at all on the Parallax course, but I've tested on my driveway and it seems to work OK.

Probably should have looked to see how other people do the sensors, but instead (as usual) I'm going to try it my own
way and see what happens... I'm using 7 proximity sensors in a 3-2-1 arrangement. Going to call the front 3 "long range sensors", the
middle 2 "short range sensors" and the center one "home".

Anyway, here's how it looks right now:
9152791528

Beau Schwabe (Parallax)
04-09-2012, 01:17 PM
@Roy - " Will that be aimed down at the ground? " - could be :-) ... don't know if I'll have a running bot or not. Most of the hardware is there, but right now it's software-less.

@JLocke - "Is that for navigating the Parallax mine field?" - That sensor could double up and be used like that, providing that the mines were metallic.

@Richard - "...Has anyone made a magnetometer using the Prop?" - Years ago (before the Propeller existed) I attempted a magnetometer to read magnetic fields, but didn't get very far. Something like that would take a lot more turns of wire than I'm willing to do by hand. The coil(s) that I am using have only 32 turns of wire and have a resonant frequency of about 110kHz, however this is subject to change.

This particular coil arrangement can be used to sense metal (even non-ferrous metal) as well as the position of the metal relative to the angle of attack to the sensor.

Beau Schwabe (Parallax)
04-10-2012, 03:08 AM
Well, it's a start.... see if I can get it spinning on it's own by the EXPO

91558

http://www.youtube.com/watch?v=zq3XWqy2s9s

dgately
04-10-2012, 03:28 AM
Here is a little something in the way of a sensor I'm putting together (See attached Image). Hopefully a version of this sensor will be on a Boe-Bot style robot. (Also Pictured)

Hmm, Beau-bot?

Beau Schwabe (Parallax)
04-10-2012, 03:32 AM
dgately,

"Hmm, Beau-bot?" .... Now your just making fun :-) ... pronounced the same way, but no.

pedward
04-10-2012, 03:33 AM
@Roy - " Will that be aimed down at the ground? " - could be :-) ... don't know if I'll have a running bot or not. Most of the hardware is there, but right now it's software-less.

@JLocke - "Is that for navigating the Parallax mine field?" - That sensor could double up and be used like that, providing that the mines were metallic.

@Richard - "...Has anyone made a magnetometer using the Prop?" - Years ago (before the Propeller existed) I attempted a magnetometer to read magnetic fields, but didn't get very far. Something like that would take a lot more turns of wire than I'm willing to do by hand. The coil(s) that I am using have only 32 turns of wire and have a resonant frequency of about 110kHz, however this is subject to change.

This particular coil arrangement can be used to sense metal (even non-ferrous metal) as well as the position of the metal relative to the angle of attack to the sensor.

I'll bet that is an antenna for your RFID reader.

Beau Schwabe (Parallax)
04-10-2012, 03:43 AM
pedward,

"I'll bet that is an antenna for your RFID reader. " - No, it's operating at a different frequency, although this sensors coil arrangement would definitely qualify and work for an RFID reader based on my findings here ... http://www.youtube.com/watch?v=LbMUWwuCx0w&list=UU4_xzR5w_y2ayitbL-d3QOQ&index=2&feature=plcp

I'm not bringing the RFID reader with me to this EXPO, but maybe at some other event.

average joe
04-10-2012, 05:17 AM
Sorry I did not see this thread yesterday and posted incorrectly. Anyway, here's some pictures of the progress.

W9GFO
04-10-2012, 10:23 AM
Here's a couple pictures of the internal pen lifter V2. It is much easier to install. No modification required other than a small hole for the wire to stick through.

http://forums.parallax.com/attachment.php?attachmentid=91572&d=1334053203

http://forums.parallax.com/attachment.php?attachmentid=91573&d=1334053203

Ttailspin
04-10-2012, 02:27 PM
W9GFO, Are you bringing that to UPEW? I just gotta see the inside of that S2...

mindrobots
04-10-2012, 03:25 PM
Sweet pen lifters, Batman!!!

Are you going to be selling those kits or providing design details? That's a fantastic accessory for the S2!!

idbruce
04-10-2012, 05:44 PM
I don't suppose this would include the Unofficial Propeller Expo Chicagoland, but if it does, I was thinking about bringing an old project, providing I actually have time to attend. This project has been modified, so it looks a little different now.

W9GFO
04-11-2012, 02:12 AM
W9GFO, Are you bringing that to UPEW? I just gotta see the inside of that S2...

Yes, I will have it at UPEW. Not much to it really. Just a small servo hot glued in place with a bit of wire on it.

http://forums.parallax.com/attachment.php?attachmentid=91604&d=1334110299

Beau Schwabe (Parallax)
04-11-2012, 04:39 AM
W9GFO,

hey that's really slick! I like that pen holder approach.