Week seventeen: Machine design

For this, we used a local Fabhouse circuit, it was designed in Fablab Puebla and manufactured by a local provider called Ryspee.

 

The charateristics of the circuitboard are the following:

 

• Base material FR-4TG130 in two layers

• PCB dimensions Width: 1.6 mm

• Red soldermask with white legends

• Hasl finish

• 2 ounces of copper

• 6000 spaced

• Minimum drill of 24000

• microcontroller A4982

• 45x56 mm

Components:

 

• 2 3x1 pinheaders.
• 1 3x2 pinheaders.
• ATtiny84.
• 8 20kOhm resistors (R1-R7, R12).
• 2 1Ohm resistors (R8 and R9).
• 2 1kOhm resistors (R10 and R11).
• 5 Capacitors.
• An LM3940 voltage regulator for 5v.
• A TSSOP-24 Multiplexer Switch ICs.
• 4 Screw terminals.

Master

Slave

#include <Servo.h>

 

#include <Wire.h>

char code='x';

int cmd=0;

Servo act;

void setup() {

  // put your setup code here, to run once:

  act.attach(9);

  Serial.begin(9600);

  Wire.begin();

}

 

void loop() {

  // put your main code here, to run repeatedly:

  if(Serial.available())

  {

    code=Serial.read();

  }

  if(code=='0')

  {

    Wire.beginTransmission(0x1);

    Wire.write(3);

    Wire.endTransmission();

    delay(1);

    Wire.beginTransmission(0x2);

    Wire.write(3);

    Wire.endTransmission();

    delay(1);

  }

  if(code=='1')

  {

    Wire.beginTransmission(0x1);

    Wire.write(1);

    Wire.endTransmission();

    delay(1);

  }

  if(code=='2')

  {

    Wire.beginTransmission(0x1);

    Wire.write(2);

    Wire.endTransmission();

    delay(1);

  }

  if(code=='3')

  {

    Wire.beginTransmission(0x2);

    Wire.write(1);

    Wire.endTransmission();

    delay(1);

  }

  if(code=='4')

  {

    Wire.beginTransmission(0x2);

    Wire.write(2);

    Wire.endTransmission();

    delay(1);

  }

  if(code=='5')

  {

    act.write(45);

  }

  if(code=='6')

  {

    act.write(55);

  }

 

 

}

#include "TinyWireS.h"                  // wrapper class for I2C slave routines

 

#define i2c_addr 0x2

int stp=1, dir=7, ms1=2, ms2=3, slp=0, ena=10;\

byte rcvd=0;

int i=0;

void setup()

{

  pinMode(stp, OUTPUT);

  pinMode(dir, OUTPUT);

  pinMode(ms1, OUTPUT);

  pinMode(ms2, OUTPUT);

  pinMode(slp, OUTPUT);

  pinMode(ena, OUTPUT);

  digitalWrite(ms1, LOW);digitalWrite(ms2, LOW);

  digitalWrite(ena, LOW);digitalWrite(slp, HIGH);

  digitalWrite(dir,1);

  TinyWireS.begin(i2c_addr);

}

 

void loop()

{

  if(TinyWireS.available())

  {

    rcvd=TinyWireS.receive();

    if(rcvd==1)

    {

      digitalWrite(dir,1);

      digitalWrite(stp,1);

      delay(10);

      digitalWrite(stp,0);

      delay(10);

    }

    if(rcvd==2)

    {

      digitalWrite(dir,0);

      digitalWrite(stp,1);

      delay(10);

      digitalWrite(stp,0);

      delay(10);

    }

    if(rcvd==3)

    {

      digitalWrite(dir,1);

      for(i=0; i++; i<200)

       {

        digitalWrite(stp,1);

        delay(10);

        digitalWrite(stp,0);

        delay(10);

 

        digitalWrite(stp,1);

        delay(10);

       }

    }

    if(rcvd==4)

    {

      digitalWrite(dir,0);

      for(i=0; i++; i<200)

       {

        digitalWrite(stp,1);

        delay(10);

        digitalWrite(stp,0);

        delay(10);

        digitalWrite(stp,1);

        delay(10);

       }

    }

  }

}