Author Topic: URGENT!!! anyone out der who made a sandwich robot, a line follower? (Read 22854 times)

Pratheek · « **Reply #60 on:** February 03, 2008, 04:07:09 AM »

Quote from: Raad on February 03, 2008, 03:52:30 AM

this leaves one problem ...the last 4 wires .. that are shown in the last two pictures of the tutorial .. i cannot make where they come from !.. can someone explain it please ? .. is there any pictures from the ones who built this robot ?
thank u :D

I think you are taking about the four red wires in the last two photos of the tutorial.
Two of the wires are connected to Vcc(red wire of the battery clip). The other two are connected to the 1K resistor. More information about the wires is given in the electronics section of the tutorial.

SmAsH · « **Reply #61 on:** February 03, 2008, 04:10:53 AM »

so do two of the wires attach to the pos+ terminal? and how do i make it obstical avoider? do i bend the front bit lol

Pratheek · « **Reply #62 on:** February 03, 2008, 04:16:33 AM »

Quote from: SmAsH on February 03, 2008, 04:05:46 AM

could someone tell me how i make it obstical avoider!

Using photoresistors it can only avoid shadows cast by objects. The method is explained in the last section of my tutorial.
I'm currently upgrading the sensors from photoresistors to IR sensors. This will enable the robot to do better obstacle avoiding. I'm also planning to use the IR sensors to do wall following and edge avoiding. After the upgrade the robot can do line following, obstacle avoiding, wall following , edge avoiding and can also can be used as a photovore and photophobe.

I guess you will have to wait for some time, until I post a tutorial about the upgrade, if you want the robot to avoid l obstacles and not their shadows.

SmAsH · « **Reply #63 on:** February 03, 2008, 04:20:35 AM »

Quote from: smashy on February 03, 2008, 04:16:33 AM

Using photoresistors it can only avoid shadows cast by objects. The method is explained in the last section of my tutorial.
I'm currently upgrading the sensors from photoresistors to IR sensors. This will enable the robot to avoid objects better. I'm also planning to use the IR sensors to do wall following and edge avoiding. After the upgrade the robot can do line following, obstacle avoiding, wall following , edge avoiding and also can be used as a photovore and photophobe.

oh ok lol ill wait

Quote from: pratheek on February 03, 2008, 04:16:33 AM

I guess you will have to wait for some time, until I post a tutorial about the upgrade, if you want the robot to avoid l obstacles and not their shadows.

i guess ill play the waiting game lol naa ive got some old stuff i can play around with. be sure to send me a e-mail when its done

add on: i think i basicly understand how it works with the shadow thing. thanks. i might try to make a tut on a robot if i have to much spare time on my hands (very unlikely i've got exams on right now) and i work most weekends. where does all my time go!

Raad · « **Reply #64 on:** February 03, 2008, 04:25:19 AM »

"Solder the remaining two wires to the red wire of the battery cap.
With this the circuit board is complete. The graphical soldering and wiring diagram is given below."

excuse my inpatients , i rushed it and missed a few lines in the tutorial ! ..

so the last two input wires come from Vcc direct ...in the pictures those two have two more coming out of the same spot ?.. or looks like its going to the capacitor and the other looks like its going under from the side?

i am looking forward to ur upgrade ..

:D
thank you for your fast replay .. did rose get to finish his/her robot ?

SmAsH · « **Reply #65 on:** February 03, 2008, 04:28:04 AM »

its a her i think. but i dont want to make the same mistake i did with admin

i saw admins lady friend and thought it was admin lol anyways back on topic. i thought two wires went into the resistors?

Raad · « **Reply #66 on:** February 03, 2008, 04:37:38 AM »

well there is 4 !!! now i got u all confused .. in the last 2 pictures u can see them clearly ..

"Solder two of these wires to the 1K resistors. From these wires we will get high or low inputs from the sensors to drive the motor

Solder the remaining two wires to the red wire of the battery cap.
With this the circuit board is complete. The graphical soldering and wiring diagram is given below. "

going to get 4 new blue LED's .. hope all turns out well

thank you all for your help .. see u soon:D:D

SmAsH · « **Reply #67 on:** February 03, 2008, 05:03:10 AM »

see me soon?? STALKER!!! lol jk anyway that cleared some things up for me.... once you see my soldering job youll understand how bad i am!

rose · « **Reply #68 on:** February 03, 2008, 06:23:26 AM »

.

Quote from: Pratheek on February 03, 2008, 03:43:35 AM

You can switch to the circuit given in one of my previous replies to this post. It uses a transistor to drive the motor instead of a L293D. So you don't need any motor driver to control your motor.

I'm done connecting all the wires and it is assembled already, so if i will use the transistors, will I need to go back from the start? Cause its all done n the only thing i must do is overlay the L293D to the 16 DIP socket

Pratheek · « **Reply #69 on:** February 03, 2008, 06:36:42 AM »

No, there is no need for you to redo the circuit board. Just solder the transistors to the board and connect the motor as shown in the circuit(which is given in my previous post). Do not forget to add diodes across the transistor, this will prevent unwanted power spikes from reaching the circuit.

hate_forever143 · « **Reply #70 on:** February 03, 2008, 09:29:16 AM »

can the $40 robot can detect a line as well as obstacles in its path and avoid it and trace the line again...

pls help as it is a task in a competiton....

airman00 · « **Reply #71 on:** February 03, 2008, 12:23:04 PM »

Quote from: hate_forever143 on February 03, 2008, 09:29:16 AM

can the $40 robot can detect a line as well as obstacles in its path and avoid it and trace the line again...
pls help as it is a task in a competiton....

no it cannot

your competition is robocup junior rescue , im assuming?
http://www.societyofrobots.com/member_tutorials/node/55

rose · « **Reply #72 on:** February 03, 2008, 04:15:17 PM »

what kind of diodes do i need? and how many?

airman00 · « **Reply #73 on:** February 03, 2008, 04:20:58 PM »

Quote from: rose on February 03, 2008, 04:15:17 PM

what kind of diodes do i need? and how many?

regular diodes NOT zener diodes

get one for every transistor ,

but remember the circuit will work without the diodes, they just provide protection

rose · « **Reply #74 on:** February 03, 2008, 04:25:58 PM »

Thank you so much!!!

I'm planning to finifh it now...

What is the value of diodide? No code, so i can buy it easily...

airman00 · « **Reply #75 on:** February 03, 2008, 04:36:15 PM »

which supplier do you want to order the diode from?

p.s. please don't message me about new replies to threads , its annoying

airman00 · « **Reply #76 on:** February 03, 2008, 04:40:14 PM »

well actually search the diodes yourself, i need to go now ill be back later

they are 1N4148 diodes

rose · « **Reply #77 on:** February 04, 2008, 06:12:30 AM »

I'm all done!!! I used the new circuit given by pratheek, but still it is not moving!!! what can be the problem? the deadline is two days from now and i'm running out of time!!! need ur help, IMMEDIATELY!!!

Trumpkin · « **Reply #78 on:** February 04, 2008, 10:18:24 AM »

double check your soldering and calm down.

Raad · « **Reply #79 on:** February 05, 2008, 04:20:15 AM »

funny rose! on the edge! ... relax

hate_forever143 · « **Reply #80 on:** February 05, 2008, 12:14:22 PM »

can any one help me to detect obstacles in the path of the $40 line following robot. what further additions will i need to make.
pls give me the details of the ckt for obstacle detection.

airman00 · « **Reply #81 on:** February 05, 2008, 06:14:28 PM »

you'll need a microcontroller

Trumpkin · « **Reply #82 on:** February 05, 2008, 08:35:05 PM »

$50 robot.

http://www.societyofrobots.com/step_by_step_robot.shtml

hate_forever143 · « **Reply #83 on:** February 06, 2008, 07:02:45 AM »

will you pls post the ckt diag and the other details....
what will i have to do if i want to club it with the $40 robot...
pls reply soon.
my contest is within 10 days

airman00 · « **Reply #84 on:** February 06, 2008, 10:18:33 AM »

follow my 3-in1 robot tutorial

I'll post the circuit instructions tonight

What is your budget

and is it for robocup junior rescue?

hate_forever143 · « **Reply #85 on:** February 06, 2008, 11:49:54 AM »

my budget is upto $100 or a little more n its not for the robocop junior rescue.
the competition is in India. so pls help...!!

hate_forever143 · « **Reply #86 on:** February 06, 2008, 12:47:54 PM »

how much did your 3 in 1 robot cost...??
n can help to build a remote controlled car for racing....??

airman00 · « **Reply #87 on:** February 10, 2008, 10:07:57 PM »

Quote from: hate_forever143 on February 06, 2008, 12:47:54 PM

how much did your 3 in 1 robot cost...??
n can help to build a remote controlled car for racing....??

I never actually calculated the cost yet

All together for parts only ... I'd estimate less than 150 bucks

r/c car for racing - just buy a kit !

garriwilson · « **Reply #88 on:** February 10, 2008, 10:15:30 PM »

Baja king Buggy Kit: http://www3.towerhobbies.com/cgi-bin/wti0161p?&I=LZ0436**

I was going to make this but then I decided not to.

Quote

REQUIRES:
Assembly
~~2-Channel Radio~~
~~2 standard size servos~~
~~6 cell 7.2V battery pack & charger~~
Polycarbonate Paint (Tamiya) (have to get this)
CA glue and building tools (and this too)

Things I crossed out are included (don't know why they put that in the required section $:-\$ )

For the paint, get the colors you want your car to be, and CA glue, and building tools like these:

http://www3.towerhobbies.com/cgi-bin/wti0006p?&T=3&I=TAMC0832

On that site don't get the charger. And you probably have the screwdrivers and some snips. Just check off everything you have, and get the stuff you don't.

Hope that helps.

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Author Topic: URGENT!!! anyone out der who made a sandwich robot, a line follower? (Read 22854 times)

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