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NEW Stingray owner!!!! — Parallax Forums

NEW Stingray owner!!!!

HighlandtinkerHighlandtinker Posts: 50
edited 2010-09-14 17:43 in Robotics
Well, I did it, I ordered a Stingray today!!!!hop.gif

I had a few extra $$ hanging around (burning a hole in my pocket ) so last week I got a PPDB and some other stuff but still wanted a Stingray, so after much twisting of my own arms and false starts, I ordered it. Now I have no money, actually, now in debt again, lol.gif· but· have lots of fun things to play with and will most likely be asking for help from the more experienced Stingray owners out on the forum. So fair warning has been given. Thanks PARALLAX!!! turn.gifyeah.gif

OPS forgot subject line. sorry nono.gif

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· Scott

Post Edited (Highlandtinker) : 6/26/2010 5:19:57 PM GMT

Comments

  • Chris SavageChris Savage Parallax Engineering Posts: 14,406
    edited 2010-06-26 17:39
    Add to that your shiny new XPORT and you're gonna be busy for awhile! =)

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    Chris Savage

    Parallax Engineering
    ·
  • johnnycarlosjohnnycarlos Posts: 44
    edited 2010-06-28 11:49
    I'm a new owner too. Putting it together right now. Exciting, huh?

    What's an XPORT?

    John
  • HighlandtinkerHighlandtinker Posts: 50
    edited 2010-06-28 12:32
    John;

    Have not recieved my Stingray yet, but am impatiently waiting to get started :=)

    The XPORT is a prize I won on Chris savage's Savage circuits forum. see link below ( I hope the link works ). I don't know much about the XPORT yet but plan to learn how to use it.

    http://forums.parallax.com/showthread.php?p=916255

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    · Scott
  • BeanBean Posts: 8,129
    edited 2010-06-28 14:45
    Not to "dis" the stingray, but I'm saving my pennies for the S2 (Scribbler 2) robot.

    Bean.

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    Use BASIC on the Propeller with the speed of assembly language.
    PropBASIC thread http://forums.parallax.com/showthread.php?p=867134

    March 2010 Nuts and Volts article·http://www.parallax.com/Portals/0/Downloads/docs/cols/nv/prop/col/nvp5.pdf
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    There are two rules in life:
    · 1) Never divulge all information
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    If you choose not to decide, you still have made a choice. [noparse][[/noparse]RUSH - Freewill]
  • HighlandtinkerHighlandtinker Posts: 50
    edited 2010-06-28 15:27
    Bean ;

    THATS ON MY WISH LIST TOO devil.gif· I am sure Parallax will have other stuff that I will want ( must have ) in the future.

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    · Scott
  • ercoerco Posts: 20,256
    edited 2010-06-28 15:58
    @Bean: Amen Brother!

    I know PhiPi is heavy on the S2 case and I have very high expectations that it will be quite impressive right out of the box.

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    ·"If you build it, they will come."
  • BeanBean Posts: 8,129
    edited 2010-06-28 16:45
    Was there a S2 at UPEW ?

    Bean

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    Use BASIC on the Propeller with the speed of assembly language.
    PropBASIC thread http://forums.parallax.com/showthread.php?p=867134

    March 2010 Nuts and Volts article·http://www.parallax.com/Portals/0/Downloads/docs/cols/nv/prop/col/nvp5.pdf
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    There are two rules in life:
    · 1) Never divulge all information
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    If you choose not to decide, you still have made a choice. [noparse][[/noparse]RUSH - Freewill]
  • John AbshierJohn Abshier Posts: 1,116
    edited 2010-06-29 03:26
    It was not there. I don't rember seeing PhiPi

    John Abshier
  • johnnycarlosjohnnycarlos Posts: 44
    edited 2010-06-30 12:19
    I have a new owner question, hopefully you won't mind if I borrow this thread.

    The Stingray is only my second microcontroller, and the first thing I noticed is the chip pins are different than the PE Kit. Each pin is 5V and comes with it's own Red and Black power pins. I'm not sure what the purpose of that is yet, but I am attempting to reproduce an input switch circuit I learned in the PE Kit. Attached is a screenshot. Like the diagram, the input pin gets connected to 3.3V, not 5V.

    The problem is when once the switch gets activated, the input pin stays high. There is connectivity from the pin, through the closed side of the tact switch to the resistor, but the pin doesn't discharge through the resistor. If I connect a jumper from the pin to the ground side of the resistor, it will finally go low. I am using the same switch, same resistor, and same setup as the PE Kit.

    But I suspect that since the pin voltage and probably current are different on the Stingray than the PE Kit, then the resistor values to create an input switch would be different too. And in this case, is 10k too high?

    EDIT: I replaced it with a 560ohm resistor and the pin can now drop low. I am at a loss to explain why this does not work with the PE Kit circuit. I am also surprised to see the Stingray example LED circuit in the manual being driven by a transistor as a switch rather than just powering directly from the pin with a resistor inline(as in the PE Kit). So there must be something different about the pin power supply that I haven't figured out yet. Does anyone know what I am missing?

    Thanks,

    John

    Post Edited (johnnycarlos) : 6/30/2010 4:53:43 PM GMT
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  • Tony B.Tony B. Posts: 356
    edited 2010-06-30 19:31
    John,

    Just a quick response on the 3.3 v and 5 v on the Propeller Robot control board on your Stingray. The Propeller still runs at 3.3 v, but is connected to the servo pin headers P0 - P23 through voltage translators. See pages 20-21 in the Stingray manual for an explanation.

    Tony
  • johnnycarlosjohnnycarlos Posts: 44
    edited 2010-06-30 21:02
    Hi Tony,

    Thanks for your reply. To be clear, yea I saw that the pins put out 5V, not 3.3. But is there a reason a smaller resistor is required to bring an input back to low? And is why did they choose to do an LED example with a transistor as a switch instead of just powering from a pin with a series resistor? I'm thinking the voltage translators are also doing something else that I don't understand.

    EDIT: I just noticed the voltage translators come with built-in 4kOhm resistor. I think that is where my confusion is coming from.

    Thanks,

    John

    Post Edited (johnnycarlos) : 7/1/2010 2:28:52 AM GMT
  • HighlandtinkerHighlandtinker Posts: 50
    edited 2010-07-03 20:29
    Got my new Stingray built and powered it up using some code from Whits Thread http://forums.parallax.com/showthread.php?p=864990 Thanks MasterC for posting your code and Whit for making a list available ( Just hope I can contribute some time ).·Man can the Stingray can flat move out. Got to be carefull not to run over the dog or cats. Now for some object avoidance stuff. NOW THE FUN BEGINS!!

    Thanks Parallax yeah.gif

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    · Scott
  • WhitWhit Posts: 4,191
    edited 2010-07-03 23:34
    Highlandtinker,

    Congrats! Glad the thread helped and that you are up and running. Just got back from a week at camp and was glad to see your post!

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    Whit+


    "We keep moving forward, opening new doors, and doing new things, because we're curious and curiosity keeps leading us down new paths." - Walt Disney
  • legoman132legoman132 Posts: 87
    edited 2010-07-08 03:21
    Just wondering: Has anybody clocked the top speed of a Stingray in MPH or FPS? I read in ROBOT that it is 12x faster than the BOE-Bot but I haven't worked out the speed on it (that might be a nice way to kill some time). I don't have a sting ray yet but getting one is on my to-do list.
  • Roy ElthamRoy Eltham Posts: 3,000
    edited 2010-07-08 06:17
    We've worked it out before, it's around theoretically 4.5 mph at max speed with 7.2v going to the motors. Realistically, it's probably more like 4 to 4.25 mph or slower with more load and as batteries drain.

    Assuming 310 rpm on the motor output and a wheel diameter of 4 7/8 inches (4.875).
    4.875in * pi = ~15.315 inches travelled with one wheel rotation
    15.315in * 310rpm = 4747.65 inches per minute
    4747.65 / 12 = 395.6375 feet per minute
    395.6375 * 60 = 23738.25 feet per hour
    23738.25 / 5280 = ~4.4958 mile per hour

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    Check out the Propeller Wiki·and contribute if you can.
  • Tony B.Tony B. Posts: 356
    edited 2010-07-08 09:16
    or 6.59 feet per second. A fact I learned the hard way. My toe and leg still hurt!
  • daveedavee Posts: 35
    edited 2010-09-14 07:32
    Got mine yesterday. Built it last night, added three pings. Thanks to the RSMotorControl object in the object exchange and some help from Hanno Snaders (12Blocks author), I now have it running in 12Blocks. I have the mods to Natively drive the H-Bridges from inside 12Blocks.

    This means that any normal 12Blocks robot program will now work with the MSR1 board using the built in motor drivers.
  • WhitWhit Posts: 4,191
    edited 2010-09-14 17:43
    Thanks for the info davee. Have fun!

    Be sure to join the Stingray Group - look for it under the community -> social groups tabs above.
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