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Winch Relay Servo
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marto
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Joined: 08 Jul 2004
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Yes that is all you should need with the new nanos. The old ones didn't have a USB interface onboard and you needed a conversion. Only thing to watch out for is that chinese ones are pretty sketchy quality. But for $4 I will take the chance.

Anything that is arduino compatible should work just with a bit of messing about with the pins. I used a Teensy 2.0 in the original as it was what I had.

Steve
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Post Fri Jun 17, 2016 9:48 am 
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seanet1310



Joined: 08 Nov 2006
Posts: 1265
Location: Adelaide


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I got the ARDUINO Compatible Nano V3.0B Module from MiniKits. Not quite the Chinese price but not too bad

Worked well in my experience and has survived two events controlling my pneumatic system. Only reason I went there was because they had a couple of IC I needed as well and ordered 2 weeks pre event so didn't want a long shipping time.

http://www.minikits.com.au/nano-v3.0b

Given we are still a while off an event I would probably risk the cheap option because the simple fact they are in the bot means you might damage one due to the forces involved. Can always source another one if it does not work. The ones from Arduino themselves are just not worth the money in my opinion.

I have also been looking at the TI MSP430. My understanding is you can just buy a chip and flash it on the board then solder the chip into your own circuit. IDE and language is very similar to Arduino as well so porting code should be quite easy.
The chip is not quite as capable but we are not generally doing overly complex work. May not be worth it here as you only need 1 or 2 copies but for slightly higher production runs or people doing custom PCB it may be worth a consideration.
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Post Fri Jun 17, 2016 6:48 pm 
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evil_steve



Joined: 06 Sep 2015
Posts: 296
Location: Adelaide, SA


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Cheers guys, I ended up ordering two off ebay, one from an Aussie seller and one ultra cheap from a Chinese seller (eh, it's cheap, and this way I have a spare).

Post Fri Jun 17, 2016 9:41 pm 
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marto
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Joined: 08 Jul 2004
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Location: Brisbane, QLD


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For my reference to be integrated into the first post.

code:

/*
Arduini Winch Thingy
 */
 
// Pin 11 has the LED on Teensy 2.0
// give it a name:
// Pin F5 ADC In
// Pin D1 RC In
// Pin B4  RC Out

int led = 11;
int rcIn = 6;
int rcOut = 13;
int potIn = 3;
int val;   
int rcMin = 800;
int rcMax = 2200;

#include <Servo.h>

Servo myservo;  // create servo object to control a servo

// the setup routine runs once when you press reset:
void setup() {               
  // initialize the digital pin as an output
  pinMode(led, OUTPUT);
  myservo.attach(rcOut);
  Serial.begin(9600);
}

// the loop routine runs over and over again forever:
void loop() {
  int pulse = pulseIn(rcIn, HIGH,500000);
  if (pulse > rcMin && pulse < rcMax){     
      val = analogRead(potIn);            // reads the value of the potentiometer (value between 0 and 1023)

      if (pulse < 1200 && val > 300){
         myservo.writeMicroseconds(1000);
      } else if (pulse > 1800 && val < 700){
         myservo.writeMicroseconds(2000);
      } else {
        myservo.writeMicroseconds(1500);
      }
     
                      // sets the servo position according to the scaled value

      //Serial.println(pulse);
      val = analogRead(potIn);            // reads the value of the potentiometer (value between 0 and 1023)
      // scale it to use it with the servo (value between 0 and 180)
  }

}



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Post Sat Jun 18, 2016 12:43 am 
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marto
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Hmmm well that's messy. I will have to fix that up a little before I suggest you use it but as people are charging ahead though it would be good to post.
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Post Sat Jun 18, 2016 12:46 am 
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evil_steve



Joined: 06 Sep 2015
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Location: Adelaide, SA


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Sorry to be a pain, but any chance of a link to the mount for the pot? I'm hoping to get this done for Nationals and I'm going to have to ask someone nicely to print it for me.

Post Thu Jun 30, 2016 9:15 pm 
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Nick
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If you can wait a week or two, I can print it out in this very promising new material: http://www.fennerdrives.com/ninjatek/_/ninjatek/armadillo/ . It is said to be 60% tougher than ABS and much easier to print. I have a reel on the way, just not sure when it will arrive.
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Post Thu Jun 30, 2016 9:25 pm 
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evil_steve



Joined: 06 Sep 2015
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Location: Adelaide, SA


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Wow, yeah, for that I can wait Very Happy

Actually, if that prints well I may reconsider getting a Cocoon Create or similar instead of something more expensive and enclosed for ABS.

Post Thu Jun 30, 2016 10:36 pm 
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Nick
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I am just just typing a long post about that - stay tuned!
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Post Thu Jun 30, 2016 10:48 pm 
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marto
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I got ardunios but I highly doubt I am going to have the time to do much documentation. Everything keeps getting away on me.

Here are links to STLs
https://www.dropbox.com/s/b8x82ubf580ajbc/PotCoupler.STL?dl=0

https://www.dropbox.com/s/yij0tlax0olekn0/WinchMount.STL?dl=0
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Post Sun Jul 03, 2016 7:51 pm 
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evil_steve



Joined: 06 Sep 2015
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That's understandable, I know the feeling. Thanks for posting the files, but I'm not sure I'll have the time/ability to sort out the winch wiring etc by Canberra.

Post Tue Jul 05, 2016 7:58 pm 
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marto
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Just realised I have never done a full CAD of the winch ever with the original gearbox does anyone have one?

Steve
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Post Sun Jul 17, 2016 3:13 pm 
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