Assessment Device

Definition: A device designed to test the wire accessing skills of the operator under the added stressor of time. Inside the case is an eight question test pertaining to general EOD knowledge. The answers to each question correspond to a wire’s color inside the Ethernet cable. The color order in which the operator answers in is the same order in which the wires must be cut. Once the case is opened an LCD will indicate the amount of time remaining with a starting time of eight minutes.

Hardware: ATMega328P (Arduino)

Arming: Plug the power cable into the wall and turn the key switch to on.

Firing: Time runs out, more than one wire cut out of order, pushing red micro switch, cutting all wires at once, removing Ethernet from the jack.

Code:

#define VERSION "1.1"

//Library Inclusions#include <Wire.h>#include <LCDi2cNHD.h>#include <inttypes.h>

//Set LCD AddressLCDi2cNHD lcd = LCDi2cNHD(4,20,0x50>>1,0);

uint8_t rows = 4;uint8_t cols = 20;

//Pin Valuesint DI = 1;int microSwitch = 2;int AI = 3;int penalty = 4;

int wireA = 5;int wireB = 6;int wireC = 7;int wireD = 8;int wireE = 9;int wireF = 10;int wireG = 11;int wireH = 12;

//Variable Valuesint TIME = 480;int skips [8];int order [8];

int submit [8];int rate = 1;int wireVal [9];int AIstate = LOW;int honest = 0;int errorCount = 0;

const long interval = 1000;

unsigned long previousMillis = 0;unsigned long spreviousMillis = 0;

void setup(){ pinMode (DI, OUTPUT); pinMode (microSwitch, INPUT); pinMode (AI, OUTPUT); pinMode (penalty, OUTPUT); pinMode (wireA, INPUT); pinMode (wireB, INPUT); pinMode (wireC, INPUT); pinMode (wireD, INPUT); pinMode (wireE, INPUT); pinMode (wireF, INPUT); pinMode (wireG, INPUT); pinMode (wireH, INPUT); //Initialize the LCD lcd.init(); lcd.clear(); //Reads value from microswitch while (digitalRead (microSwitch) == 1) { delay (1); } //Initialize skip values to 0 for (int i = 0; i < 8; i++) { skips [i] = 0; submit [i] = 10; order [i] = i; } delay (1000);}

void loop(){ getDigital(); testDigital(); penTest(); //Beep and countdown without delay unsigned long currentMillis = millis(); if (currentMillis - previousMillis >= (interval / rate)) { previousMillis = currentMillis; countdown(); if (AIstate == LOW) { AIstate = HIGH; } else { AIstate = LOW; } digitalWrite (AI, AIstate); }}

//Test penalty conditionsvoid penTest(){ int counter = 0; //Kills if the microswitch was pressed after lid opens if (digitalRead (microSwitch) == 1) { kill(); } //Kills if time runs out if (TIME == 0) { kill(); } //Sums up all the values of the wires for (int i = 0; i < 8; i++) {

counter = counter + wireVal [i]; } unsigned long secondMillis = millis(); if (secondMillis - spreviousMillis >= interval) { spreviousMillis = secondMillis; if (counter == 1) { honest = 1; } } //Disarms if all the wire vales sum up to zero if ((counter == 0) && (honest == 1)) { disarm(); } //Kills if all wires are cut at once if ((counter == 0) && (honest == 0)) { kill(); }}

//Penalty sirenvoid kill(){ digitalWrite (AI, LOW); lcd.clear(); lcd.setCursor(0,2); lcd.print ("YOU"); lcd.setCursor(1,5); lcd.print ("BETTER"); lcd.setCursor(2,11); lcd.print ("RUN"); lcd.setCursor(3,14); lcd.print ("FAST"); delay(2000); digitalWrite (penalty, HIGH); delay (1000); digitalWrite (penalty, LOW); delay (1000);

reminder();}

//Reads and stores wire values void getDigital(){ for (int i = 0; i < 8; i++) { wireVal [i] = digitalRead (i+5); }}

//Determines if a wire value is cut out of order void testDigital(){ int buffer; int holder; for (int i = 0; i < 8; i++) { if ((wireVal [i] == 0) && skips [i] == 0) { skips [i] = 1; holder = i; for (int j = 0; j < 8; j++) { if (submit [j] > 9) { submit [j] = i; if (submit [j] != order [j]) { rate = 10000; errorCount++; submit [j] = 10; buffer = 8 - i; for (int k = 1; k < buffer; k++) { order [holder] = order [holder+1]; holder++; } } break; } } } }

if (errorCount == 2) { kill(); }} //Disarm function void disarm(){ lcd.clear(); lcd.setCursor(1,0); lcd.print(" DISARMED"); digitalWrite (AI, LOW); digitalWrite (penalty, LOW); delay (500); digitalWrite (AI, HIGH); delay(100); digitalWrite (AI, LOW); delay(50); digitalWrite (AI, HIGH); delay(100); digitalWrite (AI, LOW); delay(50); digitalWrite (AI, HIGH); delay (100); digitalWrite (AI, LOW); digitalWrite (DI, HIGH); delay(60000); reminder();}

//Displays a countdown to the screenvoid countdown(){ int minutes = TIME / 60; int seconds = TIME % 60; lcd.setCursor(1,0); lcd.print(" Time Remaining"); lcd.setCursor(2,8); lcd.print(minutes); lcd.print(":"); if (seconds > 9) { lcd.print(seconds); } else

{ lcd.print("0"); lcd.print(seconds); } TIME--;}

//Reminder to turn off the device and reset the cablevoid reminder(){ digitalWrite (AI, LOW); digitalWrite (penalty, LOW); lcd.clear(); lcd.print("POWER OFF AND RESET"); while (1) { digitalWrite (AI, HIGH); digitalWrite (DI, HIGH); delay(100); digitalWrite (DI, LOW); digitalWrite (AI, LOW); delay (900); }}

Pictures: