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Soon to be bot — Parallax Forums

Soon to be bot

logan996logan996 Posts: 281
edited 2010-09-29 12:39 in Robotics
This are pictures for pi'd of a new bot that i am going to build, all i need are the wheels the MOSFET transistors (20 cents apice). I am also going to buy a cheap $5 - $10 transmitter/reciver pair and hookup the green BS2 in the picture as a remote control. A BS2PX will be the robots brains (will add more sensors when i get the money). As of right now i plan to saw off that dome on the top of the bot and mount the bs2 to it then solder a quick and dirty MOSFET board, buy wheels for all 4 sides, mount a extra AA batt. pack for the motors, attempt to mount (my one and only sensor) my PING to the front. Then after all that i will try to use my pololu micro dual serial motor controller (which i thought i fried before i got it working) and add a accelerometer THEN switch it to propeller with the previous BS2 robot board being the remote!
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Comments

  • TtailspinTtailspin Posts: 1,326
    edited 2010-09-25 08:05
    Are You sure You want to "saw that dome off the top", looks like the start of a great Propeller Beanie...:yeah:

    Oh well, looks like a fun Project anyway.
  • P!-RoP!-Ro Posts: 1,189
    edited 2010-09-25 11:57
    I can give you some tip 120 transistors if you want to control the motors. They can handle 5 amps each so it should be plenty. I may also have the right kind of wheels to attach to that drive train. If you like them and they work I can give you those, or I can even print you some wheels too so you won't have to buy any. Once you get everything planned out and everything I can send you decided I can ship it all along with the BOE and BS2px to you for free.
  • logan996logan996 Posts: 281
    edited 2010-09-26 05:45
    Wow! can they be triggered directly from the BS board? and eather way im paying for shipping, i cant let you give me free stuff and then make you pay shipping! :D the axels are hex i think so... yea
  • P!-RoP!-Ro Posts: 1,189
    edited 2010-09-26 12:35
    You will have to look at the data sheet and see. Normally the number of amps it draws is proportional to the resistor connecting to the on pin. If you want to play it safe I can also give you some NPN 3904 transistors.
  • logan996logan996 Posts: 281
    edited 2010-09-26 16:59
    umm sure ok, so do those wheels have hex shafts if so, how much will shipping be for all this?
  • P!-RoP!-Ro Posts: 1,189
    edited 2010-09-26 19:32
    No, they are meant to be held on with friction so it may not work. So far everything will be able to fit in a $5 flat rate box.
  • logan996logan996 Posts: 281
    edited 2010-09-27 14:27
    wow great, do you accept paypal? i'm verifying my payal this week so i could probaly get the $$ though paypal to you in a day or 2
  • P!-RoP!-Ro Posts: 1,189
    edited 2010-09-27 17:13
    I can, but I don't like paypal. Just remember: it's not about the money. You need to have solid plans to get the parts. Do you know how you're going to get everything to work yet?
  • RavenkallenRavenkallen Posts: 1,057
    edited 2010-09-27 17:30
    Nice work man. Glad you are putting that board to use. Instead of making a motor controller out of discrete parts, you could buy a cheap H-bridge...

    http://www.sparkfun.com/commerce/product_info.php?products_id=315

    I have used these for all of my robots...
  • logan996logan996 Posts: 281
    edited 2010-09-29 12:39
    wow! this looks great! thanks ravenkallen! simple motor control! Wow im ready to buy the parts now! just have to wait until i am officaially ungrounded than i can get you your money for shipping pi'd and i can buy the wheels and H-bridge i want! Yay! this is a very low cost project that will be a perfect reference for later projects! (oops i forgot also might need wireless parts but thats later!)
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