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Offline robonoobTopic starter

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Re: arduino board help plz
« Reply #90 on: January 11, 2008, 07:50:07 AM »
okei admin it was a little too long(the butt) so i made it shorter and put the batteries on the bottom of the robot but i will use double sided tape instead of velcro(cuz i don't know a place to buy it from) and i will also mount the scanning servo with DST but what about the 2 driving wheels? how should i mount these?? :S
i mean like if these things: http://www.servocity.com/html/90_degree_universal.html come with the servo i am going to order( http://www.robotshop.ca/home/products/robot-parts/motors/servo-motors/hitec-servo-en/hitec-hs311-servo.html ) then i think i will use them.
the IR will be  mounted with a double sided tape(DST) as well.
PS: please give my last schematics a look and tell me if this would work as i described or not :)
thank you :)

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Re: arduino board help plz
« Reply #91 on: January 11, 2008, 08:19:28 AM »
Quote
i will use double sided tape instead of velcro(cuz i don't know a place to buy it from)

You can get velcro at any hardware or craft store. I buy the $20 box of like ~20ft of velcro . . . lasts me about 5 years. But you can also buy small strips for like $2. I don't recommend double sided tape for batteries because its really hard/annoying to remove.


as for mounting wheels, dont double post!
http://www.societyofrobots.com/robotforum/index.php?topic=2729.msg19352#msg19352


And for your CAD, don't forget a method to mount your arduino onto the robot. You will of course also need room for your wiring, etc.

Offline Ro-Bot-X

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Re: arduino board help plz
« Reply #92 on: January 11, 2008, 09:59:09 AM »
You may want to install the drive servos so that the wheel axle will be towards the back instead of towards the front. This way it will improve turning radius of the ball caster and still be well weight ballanced.
Check out the uBotino robot controller!

Offline robonoobTopic starter

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Re: arduino board help plz
« Reply #93 on: January 11, 2008, 05:47:34 PM »
You may want to install the drive servos so that the wheel axle will be towards the back instead of towards the front. This way it will improve turning radius of the ball caster and still be well weight ballanced.
umm i don't know if that's what u meant but this is what i did:

Offline Ro-Bot-X

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Re: arduino board help plz
« Reply #94 on: January 12, 2008, 11:56:50 AM »
Yes, this is much better. But you should also do the same for the Sharp Sensor since they have like 4 inch minimum measured distance...

Oh, and add bump sensors, just in case the robot can't see something lower than the range sensor.
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Offline robonoobTopic starter

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Re: arduino board help plz
« Reply #95 on: January 12, 2008, 12:10:39 PM »
Yes, this is much better. But you should also do the same for the Sharp Sensor since they have like 4 inch minimum measured distance...

Oh, and add bump sensors, just in case the robot can't see something lower than the range sensor.
the 4 inch doesn't matter because i will make the robot turn if the wall is like 30 cm's from the robot :)
but bump sensors? what are these?

Offline airman00

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Re: arduino board help plz
« Reply #96 on: January 12, 2008, 07:19:02 PM »
bump sensors are contact switches

switch closed = obstacle

the obstacle hits the push button switch
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Re: arduino board help plz
« Reply #97 on: January 12, 2008, 10:25:22 PM »
Quote
the 4 inch doesn't matter because i will make the robot turn if the wall is like 30 cm's from the robot
but what if your robot turns into a wall?

Ro-Bot-X is right :P

Offline robonoobTopic starter

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Re: arduino board help plz
« Reply #98 on: January 13, 2008, 03:26:46 AM »
Quote
the 4 inch doesn't matter because i will make the robot turn if the wall is like 30 cm's from the robot
but what if your robot turns into a wall?

Ro-Bot-X is right :P
oh... i never thought about that :D anyways i will flip the scanner servo around too and then try the robot and if it starts hiting every wall then i will try making theese bump sensors  or something :)

edit: i put the scanner servo to the back i think this would work eaven better because my servo only rotates 90 degrees :)

PS: the fourth picture is about the range of view of the robot if i set the wall detection distance 30 cm.( about 12 inch)  :)
« Last Edit: January 13, 2008, 06:40:08 AM by robonoob »

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Re: arduino board help plz
« Reply #99 on: January 13, 2008, 12:04:03 PM »
hey robonoob I really like your 4th pic with the IR scan range.

can I use it in my sharp IR tutorial?

Offline robonoobTopic starter

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Re: arduino board help plz
« Reply #100 on: January 13, 2008, 12:19:33 PM »
hey robonoob I really like your 4th pic with the IR scan range.

can I use it in my sharp IR tutorial?
but ofcourse :) it would be my honor :)

Offline Trumpkin

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Re: arduino board help plz
« Reply #101 on: January 13, 2008, 05:56:40 PM »
you can get bump sensors from computer mice
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Offline robonoobTopic starter

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Re: arduino board help plz
« Reply #102 on: January 14, 2008, 06:05:40 AM »
you can get bump sensors from computer mice
yea i have a lot of them but i think i wont need one :) but that will be clear after i have built my robot :)
BTW i will get a creditcard tomorrow and then i can order the parts tomorrow too :P but i dont know how much time it takes me to get the arduino cuz its out of stock wher i am going to buy it :(

Offline robonoobTopic starter

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Re: arduino board help plz
« Reply #103 on: January 14, 2008, 03:23:05 PM »
umm i recoved the credit card a day earlyer(fortunately) and i am now ordering the parts :)
but i have some questions...
http://www.robotshop.ca/home/products/robot-parts/sensors/infrared-sensors/sharp-gp2d12-ir-range-sensor-10-cm-80.html this thing comes without the cable? am i right? so i need to buy the cable aswell?
then: i've decided to buy this servo http://www.robotshop.ca/home/products/robot-parts/motors/servo-motors/hitec-servo-en/hitec-hs422-servo-motor.html and i was wondering if there are any mounting things with it? like this? http://servocity.com/html/90_degree_universal.html
 umm yea...this may be a stupid question but i really need an answer for this one too :D can i mount my IR to the servo horn with this thing? http://www.robotshop.ca/home/products/robot-parts/mechanics/mounts-hubs/lynxmotion-multi-purpose-sensor-housing.html
http://www.robotshop.ca/home/products/robot-parts/mechanics/robot-wheel-track/tamiya-ball-caster.html are there mounting skrews added to the kit? you know like the skrews with what i can mount the caster to my robot chassis?
and then lastly i was thinking of ordering a sonar for my future projects cuz i dont want to order a second time this soon cuz the shiping here is just CRAZY and my question is: assuming that i will be using arduino then what sonar would you recommend from this page? http://www.robotshop.ca/home/products/robot-parts/sensors/ultrasonic-range-finders/index.html
i was thinking of this particular one here: http://www.robotshop.ca/home/products/robot-parts/sensors/ultrasonic-range-finders/devantech-ultrasonic-range-finder-srf05.html
PS: i want to get a cheap sonar :D and if u reccomend me a sonar them please tell me why you would pick this one :)

PSS:i would need quite a fast answer cuz i cant wait to order the parts :P(too bad i have to wait a month to recive the parts because some of the things i'm gonna order oare out of stock :( )

PSSS: can anybody please tell me why some sonars have 2 "speakers" (i dont know how they call theese things :D) but some only have 1?

Offline airman00

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Re: arduino board help plz
« Reply #104 on: January 14, 2008, 04:54:14 PM »
the IR rangefinder does not come with a cable

the 90 degree mount is good also, but remember to get the screws that come with it


yes you can mount the sensor on that mount

ok the casters come with mounting machine screws

I would get the Maxsonar EZ1 , its the easiest to use

the reason why they have 2 speakers ( aka transducers) is that one is transmitting and one recieves. When there is only one transducer than that one transducer switches off being transmitter and reciever

what material are you using for the chassis?

Check out the Roboduino, Arduino-compatible board!


Link: http://curiousinventor.com/kits/roboduino

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Offline robonoobTopic starter

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Re: arduino board help plz
« Reply #105 on: January 15, 2008, 07:32:56 AM »

the 90 degree mount is good also, but remember to get the screws that come with it


yes you can mount the sensor on that mount

ok the casters come with mounting machine screws

I would get the Maxsonar EZ1 , its the easiest to use

what material are you using for the chassis?



umm okei so what does that mean? "but remember to get the screws that come with it"
why do i have to get the screws that allready come with it anyway?
what are mounting machine screws? are these the screwa i need to mount the caster to my chassis?
how should i mount the Maxsonar EZ1?? any products from www.robotshop.ca please :) or if there arent any then please suggest me a sonar that i could mount on that: http://www.robotshop.ca/home/products/robot-parts/mechanics/mounts-hubs/lynxmotion-multi-purpose-sensor-housing.html

edit: i think i will buy this sonar: http://www.robotshop.ca/home/products/robot-parts/sensors/ultrasonic-range-finders/devantech-ultrasonic-range-finder-srf05.html because it can measure from 1 cm to 4m.
what do u think about that sonar?
also: hot to wire this sonar to my arduino i cant see any wires coming out of the device? :S
and i still didn't get the answer to my question: what comes with the servo?

edit2: I CANT FIND SPACERS ANYWHERE!!! could somebody tell me how are they really called? i dont belive they are called spacers cuz i just cant find any of the tings i need with the spacer as a keyword :S
it would be good if there are any sale on www.robotshop.ca :)
« Last Edit: January 15, 2008, 08:26:37 AM by robonoob »

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Re: arduino board help plz
« Reply #106 on: January 15, 2008, 08:24:54 AM »
Quote
hot to wire this sonar to my arduino i cant see any wires coming out of the device?

you will have to add your own wires. something like this:
http://www.societyofrobots.com/electronics_wire_connector.shtml

just like connecting stuff to the $50 Robot board

Offline airman00

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Re: arduino board help plz
« Reply #107 on: January 15, 2008, 08:32:41 AM »
Ok the servos do not come with any mounting things for the servo itself, you'll need to buy the servo mount separately. in the servo box you get the servo and a bag of these


by screws that come with it , i meant the screws that are compatible with the 90 degree servo mount . these screws http://servocity.com/html/_4_truss_head_phillip_screws.html

With the casters you get these . The casters come in kit form, they are extremely easy to build and what I like about it is that you can build them up in different ways to give them different heights.


The SRF05 is fine also , just you have to solder on wires to the pins. Look at the technical specifications of it to see what the PCB holes are for.

Its basically a two wire interface to your MCU. I like the Parallax PING ultrasonic sensor since it is a one wire interface , so if you can get a PING, get it!


Check out the Roboduino, Arduino-compatible board!


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Offline robonoobTopic starter

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Re: arduino board help plz
« Reply #108 on: January 15, 2008, 09:03:51 AM »
okei so i found this picture: http://www.superdroidrobots.com/product_info/SRF05/srf05p2.jpg can i programme and use this sonar with the arduino? and what's with the echo output and trigger input? where do i need to connect these?

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Re: arduino board help plz
« Reply #109 on: January 15, 2008, 09:05:58 AM »

Offline airman00

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Re: arduino board help plz
« Reply #110 on: January 15, 2008, 09:09:47 AM »
okei so i found this picture: http://www.superdroidrobots.com/product_info/SRF05/srf05p2.jpg can i programme and use this sonar with the arduino? and what's with the echo output and trigger input? where do i need to connect these?


its all in admins tutorial.

trigger input is basically your trigger switch shooting out a sonar signal for i think 10uS ...... then you wait for the echo output which you then convert to inches or cm
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Offline robonoobTopic starter

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Re: arduino board help plz
« Reply #111 on: January 15, 2008, 10:31:45 AM »
anybody please tell me where to buy these "spacers". i need to mount my arduino with them but i cant find any :S

Offline airman00

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Re: arduino board help plz
« Reply #112 on: January 15, 2008, 10:34:39 AM »
look at hardware stores , Home Depot may have one
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Re: arduino board help plz
« Reply #113 on: January 15, 2008, 10:35:17 AM »
Quote
anybody please tell me where to buy these "spacers". i need to mount my arduino with them but i cant find any :S
you didn't look ;)

type spacer into mcmaster, its the first link

a few are on the first page of a google search

digikey and mouser have them too

Offline robonoobTopic starter

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Re: arduino board help plz
« Reply #114 on: January 15, 2008, 11:06:39 AM »
yea but arent there any for sale in www.robotshop.ca?? i dont want to order from any other places because i will order all the other parts from there and the shiping to here (estonia) is very very expensive :S

Offline airman00

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Re: arduino board help plz
« Reply #115 on: January 15, 2008, 11:10:27 AM »
why not just put something soft under the arduino and then screw a screw through the arduino's hole and through the material into your board

you have any hardware stores in estonia?
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Offline robonoobTopic starter

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Re: arduino board help plz
« Reply #116 on: January 15, 2008, 11:17:22 AM »
lol :D yea ofcourse we have but i dont live near to any of em... :S but i will look for something soft to mount the arduino :) thank you for that idea :) oh hey it just reminded me that i have some of theese rubber "Standoffs" from an old CD-ROM :P i think i could use them :P
and i still dont know how i will mount the batteries onto the bottom of my chassis...
« Last Edit: January 15, 2008, 11:20:54 AM by robonoob »

Offline Trumpkin

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Re: arduino board help plz
« Reply #117 on: January 15, 2008, 12:56:08 PM »
just get some velcro, I don't now what kind of stores that you have in estonia but if there is a wally-world (Wal-Mart) you could find some there.
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Offline robonoobTopic starter

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Re: arduino board help plz
« Reply #118 on: January 15, 2008, 02:12:47 PM »
guess again lol :D i dont think that we have wal-mart :D but i'll see if i can find some velcro somewhere :)
okei next maybe this is a software question more than an electican one but i dont want to make another topic about it :) anyways here it is: what is the analog output range of the Sharp GP2D12 IR Range Sensor?
i dot know if i expressioned myself clearly but what i mean is that from where to where does the sensor give me the reading to my arduino board?? like the POT gives from 0 to about 1000 and so on. i would like to be as accurate as possible :)
thank you :)
oh btw i finally ordered all the parts(hopefully its all i need) but i may have to wait for 3 WHOLE MONTHS to recive these parts :S and maybe eaven more cuz some of the parts were out of stock...

PS:please tell me if i have to make another topic or can i ask the arduino programming questions here too?

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Re: arduino board help plz
« Reply #119 on: January 16, 2008, 01:21:47 PM »
spacers are easy to make . . .

you can also use those square little rubber pads that come with the servos as a spacer.

Quote
please tell me if i have to make another topic or can i ask the arduino programming questions here too?
well, keep related posts together, otherwise Ill leave it up to you to decide.

 


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