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[quote user="nycmodel"] Finally got my Arduino code worked out on the bench and wired it up to the layout for my crossing gate and flasher logic. <img style="display:inline;" src="http://i1347.photobucket.com/albums/p709/Modelrrtrains/arduino%202016%20004_zpsh0kdljd8.jpg" alt=" " /> Since I had many circuit boards left over from my original Bruce Chubb CRMI installation on a previous layout, I chose to utilize those cab relays where possible by modifying the boards. The perfboard on the upper right allows the Arduino outputs to drive the relays via the transistors. I added additional Optimized Detectors to cover the 6 inputs. <img style="display:inline;" src="http://i1347.photobucket.com/albums/p709/Modelrrtrains/arduino%202016%20001_zpsjogprljk.jpg" alt=" " /> <img style="display:inline;" alt=" " /> <img style="width:704px;height:auto;display:inline;" src="http://i1347.photobucket.com/albums/p709/Modelrrtrains/arduino%20controlled%20system_jpg_zpssb0xwpb9.jpg" alt=" " /> /*  crossing_logic_1 12/24/16                   gates_down_1                          flashers_on_1                 |----                                  X  -----------------| |-----------------------------------| |------------------       signal_block_1 entire length     west_block_1               mid_block_1                    east_block_1      -----------------| |-----------------------------------| |------------------       signal_block_2 entire length     west_block_2  ----|        mid_block_2                 X  east_block_2                    gates_down_2                           flashers_on_2                  All 6 inputs are from Chubb Optimized detectors where HIGH = unoccupied and LOW = occupied   All 4 outputs will turn on HIGH when the proper inputs are LOW, driving relays via transistors connected to the 12v supply. These relays   will then activate crossing gates, flashers and block signals.    */   // Define pins const int west_block_1_pin = 2; const int mid_block_1_pin = 3; const int east_block_1_pin = 4; const int west_block_2_pin = 5; const int mid_block_2_pin = 6; const int east_block_2_pin = 7; const int gates_down_pin = 8; const int flashers_on_pin = 9; const int signal_block_1_pin = 10; const int signal_block_2_pin = 11; // Define and initialize all variables as HIGH (off) except outputs that drive relays through transister switches where HIGH is on. int west_block_1 = HIGH; int mid_block_1 = HIGH; int east_block_1 = HIGH; int west_block_2 = HIGH; int mid_block_2 = HIGH; int east_block_2 = HIGH; int gates_down_1 = LOW;    //relay active HIGH to show gates down for block 1 int flashers_on_1 = LOW;   //relay active HIGH to show flashers on for block 1 int gates_down_2 = LOW;    //relay active HIGH to show gates down for block 2 int flashers_on_2 = LOW;   //relay active HIGH to show flashers for block 2 int signal_block_1 = LOW;  //relay active HIGH to show block 1 occupied int signal_block_2 = LOW;  //relay active HIGH to show block 2 occupied int eastbound_sequence_1 = HIGH; //active HIGH show eastbound train moving through block 1 int westbound_sequence_1 = HIGH; //active HIGH show westbound train moving through block 1 int eastbound_sequence_2 = HIGH; //active HIGH show eastbound train moving through block 2 int westbound_sequence_2 = HIGH; //active HIGH show westbound train moving through block 2 void setup() {   //start serial connection for debugging   Serial.begin(9600);   // initialize digital pin 13 as an output for onboard LED to use as a "heartbeat" for the sketch   pinMode(13, OUTPUT);   //configure pins 2 to 7 as an input and enable the internal pull-up resistor   pinMode(west_block_1_pin, INPUT_PULLUP);   // Unlike pinMode(INPUT), there is no pull-down resistor necessary. An internal   pinMode(mid_block_1_pin, INPUT_PULLUP);   // 20K-ohm resistor is pulled to 5V. This configuration causes the input to   pinMode(east_block_1_pin, INPUT_PULLUP);  // read HIGH when the switch is open, and LOW when it is closed.   pinMode(west_block_2_pin, INPUT_PULLUP);   pinMode(mid_block_2_pin, INPUT_PULLUP);   pinMode(east_block_2_pin, INPUT_PULLUP);    //configure pins 8 to 11 as outputs. HIGH when not actuated and LOW when actuated ;i.e. action activated   pinMode(gates_down_pin, OUTPUT);   pinMode(flashers_on_pin, OUTPUT);   pinMode(signal_block_1_pin, OUTPUT);   pinMode(signal_block_2_pin, OUTPUT);   // Initialize all outputs as off   digitalWrite(gates_down_pin, LOW); //start with gates up   digitalWrite(flashers_on_pin, LOW); //start with flashers off   digitalWrite(signal_block_1_pin, LOW); //start with block 1 unoccupied   digitalWrite(signal_block_2_pin, LOW); //start with block 2 unoccupied   } void loop() {   digitalWrite(13, HIGH);   // turn the  "heartbeat" LED on   //read the input values into the variables   west_block_1 = digitalRead(west_block_1_pin);   mid_block_1 = digitalRead(mid_block_1_pin);   east_block_1 = digitalRead(east_block_1_pin);   west_block_2 = digitalRead(west_block_2_pin);   mid_block_2 = digitalRead(mid_block_2_pin);   east_block_2 = digitalRead(east_block_2_pin);   Serial.print("gates_down_1: ");   Serial.println(gates_down_1);   Serial.print("flashers on_1: ");   Serial.println(flashers_on_1);   Serial.print("gates_down_2: ");   Serial.println(gates_down_2);   Serial.print("flashers on_2: ");   Serial.println(flashers_on_2);   Serial.print("west_block_1: ");   Serial.println(west_block_1);   Serial.print("mid_block_1: ");   Serial.println(mid_block_1);   Serial.print("east_block_1: ");   Serial.println(east_block_1);   Serial.print("west_block_2: ");   Serial.println(west_block_2);   Serial.print("mid_block_2: ");   Serial.println(mid_block_2);   Serial.print("east_block_2: ");   Serial.println(east_block_2);   Serial.print("eastbound_sequence_1: ");   Serial.println(eastbound_sequence_1);   Serial.print("westbound_sequence_1: ");   Serial.println(westbound_sequence_1);   Serial.print("eastbound_sequence_2: ");   Serial.println(eastbound_sequence_2);   Serial.print("westbound_sequence_2: ");   Serial.println(westbound_sequence_2);         if (west_block_1 == HIGH && mid_block_1 == HIGH && east_block_1 == HIGH  && west_block_2 == HIGH && mid_block_2 == HIGH && east_block_2 == HIGH) {  //blocks 1 and 2 completely clear   /* ---------------------------------------------- INITIALIZATION  LOGIC ------------------------------------------------------ */     digitalWrite(gates_down_pin, LOW);  //raise gates     digitalWrite(flashers_on_pin, LOW);  //turn off flashers     gates_down_1 = LOW;  //show gates up     flashers_on_1 = LOW; //show flashers off     gates_down_2 = LOW;  //show gates up     flashers_on_2 = LOW; //show flashers off     eastbound_sequence_1 = HIGH;           //initialize block 1 eastbound sequence     westbound_sequence_1 = HIGH;           //initialize block 1 westbound sequence     eastbound_sequence_2 = HIGH;           //initialize block 2 eastbound sequence     westbound_sequence_2 = HIGH;           //initialize block 2 westbound sequence     digitalWrite(signal_block_1_pin, LOW); //show block 1 clear     digitalWrite(signal_block_2_pin, LOW); //show block 2 clear     Serial.println("Initializing block 1");      Serial.println("Initializing block 2"); }   else if (west_block_1 == HIGH && mid_block_1 == HIGH && east_block_1 == HIGH){  //block 1 completely clear     eastbound_sequence_1 = HIGH;           //initialize block 1 eastbound sequence     westbound_sequence_1 = HIGH;           //initialize block 1 westbound sequence     digitalWrite(signal_block_1_pin, LOW); //show block 1 clear     Serial.println("Initializing block 1");  }   else if (west_block_2 == HIGH && mid_block_2 == HIGH && east_block_2 == HIGH){  //block 2 completely clear     eastbound_sequence_2 = HIGH;           //initialize block 2 eastbound sequence     westbound_sequence_2 = HIGH;           //initialize block 2 westbound sequence     digitalWrite(signal_block_2_pin, LOW); //show block 1 clear     Serial.println("Initializing block 2");  }       /* ----------------------------------------------------------------------------------------------------------------------------------- */    /* If the blocks are not completely clear then proceed with the gate and flasher logic for each block */   /* --------------------------------------------------------- BLOCK 1 ------------------------------------------------------------------- */   /* ------------------------------------------------------ CROSSING GATE ------------------------------------------------------------- */   /* ----------------------------------------------------- EASTBOUND LOGIC ------------------------------------------------------------ */    if (west_block_1 == LOW && mid_block_1 == HIGH && gates_down_1 == LOW && eastbound_sequence_1 == HIGH && westbound_sequence_1 == HIGH)  {   //initial Eastbound approach gates     digitalWrite(gates_down_pin, HIGH);  //drop gates     gates_down_1 = HIGH;                  //show gates down     eastbound_sequence_1 = LOW;       //set start of eastbound sequence     Serial.print("Drop gates initial eastbound"); }   else if (west_block_1 == HIGH && mid_block_1 == LOW && gates_down_1 == HIGH && eastbound_sequence_1 == LOW && westbound_sequence_1 == HIGH)  { //clearing crossing eastbound gates     gates_down_1 = LOW;}   /* --------------------------------------------------- WESTBOUND LOGIC ------------------------------------------------------------ */   else if (mid_block_1 == LOW && west_block_1 == HIGH && gates_down_1 == LOW && eastbound_sequence_1 == HIGH) {   //&& westbound_sequence_1 == HIGH && eastbound_sequence_1 == HIGH) {   //initial Westbound approach gates     digitalWrite(gates_down_pin, HIGH);  //drop gates     gates_down_1 = HIGH;                  //show gates down     westbound_sequence_1 = LOW;       //set start of westbound sequence     Serial.print("Drop gates initial westbound"); }   else if (west_block_1 == LOW && mid_block_1 == HIGH && gates_down_1 == HIGH && westbound_sequence_1 == LOW) { //clearing crossing westbound gates     gates_down_1 = LOW;}       /* ------------------------------------------------------__ FLASHER ------------------------------------------------------------- */    /* ----------------------------------------------------- EASTBOUND LOGIC ------------------------------------------------------------ */   else if (mid_block_1 == LOW && east_block_1 == HIGH && flashers_on_1 == LOW && eastbound_sequence_1 == LOW && westbound_sequence_1 == HIGH) {  //initial Eastbound approach flashers     digitalWrite(flashers_on_pin, HIGH);  //turn on flashers     flashers_on_1 = HIGH;                  //show flashers on     eastbound_sequence_1 = LOW;        //set start of eastbound sequence     Serial.print("Flashers on initial eastbound"); }   else if (east_block_1 == LOW && mid_block_1 == HIGH && flashers_on_1 == HIGH && eastbound_sequence_1 == LOW) { //clearing crossing eastbound flashers     flashers_on_1 = LOW;}   /* ----------------------------------------------------- WESTBOUND LOGIC ------------------------------------------------------------ */   else if (east_block_1 == LOW && mid_block_1 == HIGH && flashers_on_1 == LOW && westbound_sequence_1 == HIGH && eastbound_sequence_1 == HIGH) {   //initial Westbound approach flashers     digitalWrite(flashers_on_pin, HIGH);  //turn on flashers     flashers_on_1 = HIGH;                  //show flashers on     westbound_sequence_1 = LOW;        //set start of westbound sequence     Serial.print("Flashers on initial westbound"); }   else if (east_block_1 == HIGH && mid_block_1 == LOW && flashers_on_1 == HIGH && westbound_sequence_1 == LOW) { //clearing crossing westbound flashers     flashers_on_1 = LOW;}       /* --------------------------------------------------------- BLOCK 2 ------------------------------------------------------------------- */   /* ------------------------------------------------------ CROSSING GATE ------------------------------------------------------------- */   /* ----------------------------------------------------- EASTBOUND LOGIC ------------------------------------------------------------ */   if (west_block_2 == LOW && mid_block_2 == HIGH && gates_down_2 == LOW && eastbound_sequence_2 == HIGH && westbound_sequence_2 == HIGH)  {   //initial Eastbound approach gates     digitalWrite(gates_down_pin, HIGH);  //drop gates     gates_down_2 = HIGH;                  //show gates down     eastbound_sequence_2 = LOW;       //set start of eastbound sequence     Serial.print("Drop gates initial eastbound"); }   else if (west_block_2 == HIGH && mid_block_2 == LOW && gates_down_2 == HIGH && eastbound_sequence_2 == LOW && westbound_sequence_2 == HIGH) { //clearing crossing eastbound gates     gates_down_2 = LOW;}   /* --------------------------------------------------- WESTBOUND LOGIC ------------------------------------------------------------ */   else if (mid_block_2 == LOW && west_block_2 == HIGH && gates_down_2 == LOW && eastbound_sequence_2 == HIGH) {   //&& westbound_sequence_1 == HIGH && eastbound_sequence_1 == HIGH) {   //initial Westbound approach gates     digitalWrite(gates_down_pin, HIGH);  //drop gates     gates_down_2 = HIGH;                  //show gates down     westbound_sequence_2 = LOW;       //set start of westbound sequence     Serial.print("Drop gates initial westbound"); }   else if (west_block_2 == LOW && mid_block_2 == HIGH && gates_down_2 == HIGH && westbound_sequence_2 == LOW) { //clearing crossing westbound gates     gates_down_2 = LOW;}   /* ------------------------------------------------------__ FLASHER ------------------------------------------------------------- */    /* ----------------------------------------------------- EASTBOUND LOGIC ------------------------------------------------------------ */   else if (mid_block_2 == LOW && east_block_2 == HIGH && flashers_on_2 == LOW && eastbound_sequence_2 == LOW && westbound_sequence_2 == HIGH) {  //initial Eastbound approach flashers     digitalWrite(flashers_on_pin, HIGH);  //turn on flashers     flashers_on_2 = HIGH;                  //show flashers on     eastbound_sequence_1 = LOW;        //set start of eastbound sequence     Serial.print("Flashers on initial eastbound"); }   else if (east_block_2 == LOW && mid_block_2 == HIGH && flashers_on_2 == HIGH && eastbound_sequence_2 == LOW) { //clearing crossing eastbound flashers     flashers_on_2 = LOW;}   /* ----------------------------------------------------- WESTBOUND LOGIC ------------------------------------------------------------ */   else if (east_block_2 == LOW && mid_block_2 == HIGH && flashers_on_2 == LOW && westbound_sequence_2 == HIGH && eastbound_sequence_2 == HIGH) {   //initial Westbound approach flashers     digitalWrite(flashers_on_pin, HIGH);  //turn on flashers     flashers_on_2 = HIGH;                  //show flashers on     westbound_sequence_2 = LOW;        //set start of westbound sequence     Serial.print("Flashers on initial westbound"); }   else if (east_block_2 == HIGH && mid_block_2 == LOW && flashers_on_2 == HIGH && westbound_sequence_2 == LOW) { //clearing crossing westbound flashers     flashers_on_2 = LOW;}     /* ---------------  Fail safe train blocking crossing --------------------------------------------------- */   else if (east_block_1 == LOW && mid_block_1 == LOW) { //Flasher crossing is blocked, track 1     digitalWrite(flashers_on_pin, HIGH);  //turn on flashers     flashers_on_1 = HIGH;                  //show flashers on     eastbound_sequence_1 = LOW;        //set start of eastbound sequence     Serial.print("Flashers on-fail safe"); }   else if (east_block_2 == LOW && mid_block_2 == LOW) { //Flasher crossing is blocked, track 2     digitalWrite(flashers_on_pin, HIGH);  //turn on flashers     flashers_on_2 = HIGH;                  //show flashers on     eastbound_sequence_2 = LOW;        //set start of eastbound sequence     Serial.print("Flashers on-fail safe"); }   else if (west_block_1 == LOW && mid_block_1 == LOW) { //gate crossing is blocked, track 1     digitalWrite(gates_down_pin, HIGH);  //drop gates     gates_down_1 = HIGH;                  //show gates down     eastbound_sequence_1 = LOW;       //set start of eastbound sequence     Serial.print("Drop gates-fail safe"); }   else if (west_block_2 == LOW && mid_block_2 == LOW) { //gate crossing is blocked, track 2     digitalWrite(gates_down_pin, HIGH);  //drop gates     gates_down_2 = HIGH;                  //show gates down     eastbound_sequence_2 = LOW;       //set start of eastbound sequence     Serial.print("Drop gates-fail safe"); }     /* ------------------- Raise gate logic --------------------------------------------------------------- */   /* Since there are two tracks we don't want to raise the gates for one track if the other is still down */   if (gates_down_1 == LOW && gates_down_2 == LOW){   // both tracks are clear of the gate crossing      digitalWrite(gates_down_pin, LOW);  //raise gates     Serial.println("Raise gates"); }       /* ------------------- Turn off flasher logic ____________________________________________ */   /* Since there are two tracks we don't want to turn off the flashers for one track if the other is still on */   if (flashers_on_1 == LOW && flashers_on_2 == LOW){   // both tracks are clear of the flasher crossing      digitalWrite(flashers_on_pin, LOW);  //turn off flashers     Serial.println("Turn off flashers"); }           /* ----------------- BLOCK SIGNAL LOGIC ------------------------------------------ */   Serial.println("");   if (east_block_1 == LOW || mid_block_1 == LOW || west_block_1 == LOW){ // If any of the 3 blocks for track 1 are occupied set block 1 signals to red      digitalWrite(signal_block_1_pin, HIGH); //show block 1 occupied}      Serial.println("Block 1 occupied");}   else if (east_block_1 && HIGH && mid_block_1 == HIGH && west_block_1 == HIGH){ //If all 3 blocks for track 1 are clear set block 1 signals to green     digitalWrite(signal_block_1_pin, LOW); //show block 1 clear     Serial.println("Block 1 clear");}     if (east_block_2 == LOW || mid_block_2 == LOW || west_block_2 == LOW){ // If any of the 3 blocks for track 2 are occupied set block 2 signals to red      digitalWrite(signal_block_2_pin, HIGH);      Serial.println("Block 2 occupied");} //show block 2 occupied   else if (east_block_2 && HIGH && mid_block_2 == HIGH && west_block_2 == HIGH){ //If all 3 blocks for track 2 are clear set block 2 signals to green     digitalWrite(signal_block_2_pin, LOW); //show block 2 clear     Serial.println("Block 2 clear");}   /* ------------------------------------------------------------------------------ */    // digitalWrite(13, HIGH);   // turn the  "heartbeat" LED on    // delay(500);               // wait for a half second     digitalWrite(13, LOW);    // turn the  "heartbeat" LED off    //delay(500);               // wait for a half second     Serial.println("");      //carriage return      Serial.println("");      //carriage return     Serial.println("");      //carriage return   } <div style="clear:both;"> </div> [/quote] This is why Im not really interested in Arduino.  I have no desire to write or debug 100s of lines of code,  I will wait patiently for LCC to become fully fleshed out with a GUI with dropdown boxes and radio buttons to select the functions.  The above lines of code are not my version of fun.  If its yours, great!  I on the other hand would prefer to purchase off the shelf components and not write code.
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