ClearMemory041063

Most recent activity

• mDNS is working with Bonjour

  @ClearMemory041063 started

  • 60 comments
  • 27,856 views

  @MaBe replied
• PID Control Object (with questions)

  @ClearMemory041063 started

  • 27 comments
  • 8,988 views

  @Gordon replied
• Forth!

  in Projects • 6 years, 5 months

  

  If Forth like honk then!

• Peeking at Espruino Board Timers 2, 3, 4, and 5

  @ClearMemory041063 started

  • 25 comments
  • 8,688 views

  @Gordon replied
• How to recalibrate/reset Magnetometer?

  in Puck.js, Pixl.js and MDBT42 • 6 years, 8 months

  

  You list

  require("https://www.espruino.com/module­­s/Vec3.js"); //no errors
  

  Try dropping the .js

  require("https://www.espruino.com/module­­s/Vec3"); //no errors
  

• Using a Shadow to Create a Light Seeking Sensor

  @ClearMemory041063 started

  • 1 comment
  • 1,959 views

  @ClearMemory041063 replied
• Using a Shadow to Create a Light Seeking Sensor

  in Projects • 6 years, 9 months

  

  Light Seeking System

  Two photo resistors are positioned on opposite sides of a rectangular beam. It the beam is pointing at a light source both photoresistors produce equal values. If not aligned this balance is upset by the shadow of the beam and the difference in photo resistor output is used to rotate the beam using a stepper motor.

  Gnd-- 10k--AnalogInPin--Photoresistor--3.3V

  The code

  //SeekSun1.js
  // 7 Mar 2017
  // add stepper motor code
  
  // 4 Mar 2018
  // Uses 2 photoresistors and 10k resistors to provide
  // two analog inputs
  // the LED color changes depending on the sign of the
  // difference between the analog inputs.
  //
  //          |
  //   pr1----|====pr2
  // the vertical bar casts a shadow on the pr
  // this creates a difference in input values
  // use this to rotate the assembly so that the 
  // difference in inputs is within the band
  // Stepper Motor Interface Configuration
  var action=0;
  var Step=A8;//LED1;//A8;
  var Dir=B7;
  var pp=new Uint8Array(32);  // 16 microsteps *2,  see BigEasy docs
  // Photo resistor Configuration
  var P1=B1;
  var P2=A7;
  
  pp.fill(1); //pulse time in ms
  pinMode(Step,"output");
  pinMode(Dir,"output");
  digitalWrite(Step,0);
  digitalWrite(Dir,0^action);
  clearInterval();
  
  function move(d){
   digitalWrite(Dir,d^action);
   digitalPulse(Step,0,pp);
  }
  
  var verbose=1;//0;//1;
  function clog(a){
    if(verbose>0)console.log(a);
  }
  
  var band=0.01;
  
  pinMode(P1,'analog');
  pinMode(P2,'analog');
  
  clog(analogRead(P1));
  clog(analogRead(P2));
  var a,b,c,d;
  var sss="";
  
  setInterval(function(){
   a=analogRead(P1);
   b=analogRead(P2);
   sss=a.toString()+",";
   sss+=b.toString()+",";
   sss+=(a-b).toString();
   clog(sss);
   c=a-b;
   d=c;
   if(d<0)d=d*-1;
   if(d<band){
     digitalWrite(LED2,0);
     digitalWrite(LED1,0);
     //nomotion();
   }else{
    if(c<0){
     digitalWrite(LED1,0);
     digitalWrite(LED2,1);
     //rotleft();
     move(0);
   }
    if(c>0){
     digitalWrite(LED2,0);
     digitalWrite(LED1,1);
     //rotright();
     move(1);
    }
   }//end else
  },1000);
  

  Stepper Motor Stuff

  Big Easy

  or
  BigEasy2

  or for smaller stepper motors
  EasyDriver

  Wiring

  Pico Bigeasy

  Gnd Gnd

  B7 Dir

  A8 Step

  Powered the BigEasy board with 12V

• console.log blocks action when disconnected from WebIDE (or a terminal program)

  @ClearMemory041063 started

  • 2 comments
  • 2,596 views

  @Gordon replied
• console.log blocks action when disconnected from WebIDE (or a terminal program)

  in JavaScript • 6 years, 9 months

  

  If you use console.log in a program but disconnect the program execution is blocked when the console buffer is full.

  For example:

  // Console.log blocks LED On/Off flashing when
  // disconnected
  
  var l=0;
  myinterval=setInterval(function () {
     digitalWrite(LED1,l=!l);
  }, 1000);
  
  var i=0;
  setInterval(function(){
    console.log(i);
    i++;
  },200);
  
  // load program
  // LED is pulsing On an dOff
  // Console is displaying the count in i
  // Disconnect the WebIde
  // The LED action stops
  // Reconnect the WebIde
  // Buffered count is displayed
  // LED resumes action
  

  and the output:

            |_| http://espruino.com
   1v95 Copyright 2017 G.Williams
  >
  =undefined
  0
  1
  2
  3
  4
  5
  6
  7
  8
  9
  10
  11
  Disconnected   ( the LED stops until reconnected)
  >
  12
  13
  14
  15
  16
  

  If you are using console.log to show the connection status etc. of a WiFi connection, disconnecting the WebIde will block the server.

  Not complaining about this, just posting to let others know about this gotcha.

• A WIFI Datalogger for Espruino PICO

  @ClearMemory041063 started

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