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and i also want to know that do i have to buy a cable to connect this board to my computer? or can i put this board directly to my comp?
So you need to buy this Arduino board: http://www.sparkfun.com/commerce/product_info.php?products_id=666, a usb cable: http://www.sparkfun.com/commerce/product_info.php?products_id=512 a break away pin header: http://www.sparkfun.com/commerce/product_info.php?products_id=116, 1 or 2 IR sensors: http://www.sparkfun.com/commerce/product_info.php?products_id=242.The board needs a battery holder with a round power jack connector that I didn't find on their site.You will also need 2 servos modified for continuous rotation. Optional, a standard servo to scan the IR sensor.
As I have told you in the other post, those mouse IR LEDs and IR fototranzistors you can use for line following or wheel encoders. Read the tutorials and you will see.The sensors from the link that I gave you are Sharp IR Distance sensors that you can't replicate with mouse parts.The pin header you need to connect the servos and sensors to the Arduino board. And yes, you need to solder wires to these pins. Or, you can get some Jumper Wires http://www.sparkfun.com/commerce/product_info.php?products_id=8431You want to use salvaged parts but not to solder anything??? Those salvaged parts need to be unsoldered anyway... I guess you can use a breadboard... in this case you need the Arduino Proto Shield http://www.sparkfun.com/commerce/product_info.php?products_id=7914 and a small Breadboard that you glue (it's self adhesive) in the middle of the Proto Shield: http://www.sparkfun.com/commerce/product_info.php?products_id=7916 If you want to do it the easy way (no soldering involved) you need more money to buy a complete robot kit like the Parallax Boe-Bot or Lego Mindstorms NXT.
Servos have 3 pins (on a female connector), Signal, Power and Ground. Same goes for IR Distance sensors (actually, these have a small 3 pin male header, so you need to buy pre-crimped wire connectors, or solder wires directly)Arduino board has female connectors for Signal on one side and for Power and Ground (GND) on another side. So you need the Jumper wires to make the connections or to cut the servo cable near the connector and split the wires separately for Signal and Power + GND and solde pin headers on them.Do you understand this?
the rangefinder is an IR led and receiver, so it needs +5v and ground and it send out a signal
Why do you have the +5V going to a resistor and the IR Rangefiner output?
umm okei that confused me a little...First: admin do u mean that i use 6V batterypack for two servos and only a signal wire goes from servo to arduino?Second: what is a pull up resistor and what is a digital range finder and what is a analog one :Di mean whats the difference and whichone should i use if I'm making a wall avoiding bot?and i made the Admin version picture too(at least i think that Admin meant that )Third:can anybody please explain me what does these things mean like digital input and output, analog in and so on so on...Fourth: http://www.sparkfun.com/commerce/product_info.php?products_id=242 this is the IR range finder I'm planing to use... it says there:"has an analog output that varies from 3.1V at 10cm to 0.4V at 80cm"(what ever it means) so... do i need to use the resistor or not?Fifth: admin u said that there is no power bus... maybe this would help if I'd buy myself these 2 things?(although i don't know how to use these...:S) http://www.sparkfun.com/commerce/product_info.php?products_id=7914 and http://www.sparkfun.com/commerce/product_info.php?products_id=7916 ah and could anybody please explain me how to use these things and...
Almost there... ^^You need to connect the boards ground with the servos ground (note - only ground not +V) else the signal wires to the servos doesn't make an enclosed circuit.Also, remove the resistor on the IR rangefinder. That sensor is an complete package as it is. You just need to connect it to +5V, Ground and an analog input on the arduino.
If you look at my $50 Robot, the pins where you connect the servos and sensors is a power bus.You need to make something like that to plug everything in.
You may want to add another servo for scanning the Sharp sensors, because the car like steering is hard to maneuver out of corners, so you want to find bad spots before you get into them. And is also good for pathfinding.
Take a look at Admin's wavefront algorithm to do it. You are on the right track.
Ohh, I almost forgot, you need encoders for pathfinding.
mega i looked the links you gave...but unfortunately i didn't find anything for myself Sad but thanks anyway...so...I'm still waiting for somebody to help me with my schematics...