Do you need a speed controller for those Pololu motors Aaron? Thanks.
_________________
Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world.
Albert Einstein.

quote:

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Originally posted by assassin:
Do you need a speed controller for those Pololu motors Aaron? Thanks.

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also consider the Pololu Trex Jr

quote:

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Originally posted by Jaemus:
also consider the Pololu Trex Jr

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quote:

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Originally posted by Jaemus:
also consider the Pololu Trex Jr

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quote:

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Originally posted by assassin:
Could a pneumatic launcher work in this class? Thanks.

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quote:

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Originally posted by Philip:

quote:

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Originally posted by assassin:
Could a pneumatic launcher work in this class? Thanks.

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Full pressure CO2 in an ant. You know you want to.

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Build a FP system and pressure test it. IMO, if it passes the same tests as other weight classes it is fine by me.
_________________
So even the rain that falls isn't actually going to fill our dams and our river systems

quote:

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Originally posted by Philip:

quote:

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Originally posted by assassin:
Could a pneumatic launcher work in this class? Thanks.

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Full pressure CO2 in an ant. You know you want to.

The Sabretooth 2 x 5A is 19g.

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i run a pololu trex jr in my beetleweight to great effect on two ebay gearmotors
even used the 3rd channel to run a DSE P9004 for a weapon drive

OK next lazy question by me....

Is the standard spectrum receiver the lightest/smallest solution for ants(three channels needed)? Thanks.
_________________
Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world.
Albert Einstein.

quote:

---

Originally posted by assassin:
OK next lazy question by me....

Is the standard spectrum receiver the lightest/smallest solution for ants(three channels needed)? Thanks.

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An idea from Matt (Jack the Flipper) from the RC racing club he goes to. The 2.4GHz radios have and antenna that is about 25mm (can someone check this as I am too lazy to do the 5 seconds of math needed) on the end of a bit of 100mm coax. Since they don't need excessive range the car guys cut the coax down to 30mm, strip the shield off the last 25mm to make an antenna (same length as original) and mount it inside the receiver case. Other option is to tape the new antenna to the side of the case.
Only thing I see with this is that 2.4GHz have 2 antennas that should be kept at least 1/4 wavelength apart (one antenna length).
_________________
Get Some!!!

Secretary of the Queensland Robotics Sports Club inc.

Yep done this on two of my RXs works fine. HK receivers only have 1 antenna.

Steve
_________________
Steven Martin
Twisted Constructions
http://www.botbitz.com

Last edited by marto on Sat Jul 17, 2010 10:02 pm; edited 1 time in total

Got bit bored so whipped up some quick arduino code to run B328 as RC motor controller.

code:

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#include <OrangutanMotors.h>

#define CH1 7
#define CH2 4

#define rcMin 1200
#define rcMax 1900
#define DEBUG 0

OrangutanMotors motors; 
unsigned long input2;
unsigned long input1;

void setup()
{
  if(DEBUG)
  {
    Serial.begin(38400);
    Serial.println("Start");
  }
  pinMode(CH1,INPUT);
  pinMode(CH2,INPUT);
}

void loop()
{
  input2 = pulseIn(CH2, HIGH) ;
  input1 = pulseIn(CH1, HIGH) ;
 
  if (input2 != 0 && input1 != 0)
  {
    if(DEBUG)
    {
      Serial.println("Input");
      Serial.println(input1);
      Serial.println(input2);
    }
   
    int M1 = (input1 - rcMin) -  (rcMax - rcMin)/2;
    int M2 = (input2 - rcMin) -  (rcMax - rcMin)/2;
   
    motors.setSpeeds(M1,M2);
  } 
}

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