{"id":141,"date":"2008-10-23T08:20:35","date_gmt":"2008-10-23T12:20:35","guid":{"rendered":"http:\/\/mikelberman.com\/blog\/?p=141"},"modified":"2008-10-23T08:20:35","modified_gmt":"2008-10-23T12:20:35","slug":"electro-magnate","status":"publish","type":"post","link":"http:\/\/mikelberman.com\/blog\/?p=141","title":{"rendered":"Electro-Magnate"},"content":{"rendered":"

<\/embed><\/object><\/p>\n

It’s 8:08 AM… yes people, 808. and i did consume 8+8 caffeinated beverages over the course of the last 22 hours I’ve been P-Comping. I’m not great on documentation after I crash out, but here’s some Arduino code.<\/p>\n

int incomingByte = 0;<\/p>\n

\/\/servo variables<\/p>\n

int servoPin = 2;\u00a0\u00a0\u00a0\u00a0 \/\/ Control pin for servo motor<\/p>\n

int minPulse = 500;\u00a0\u00a0 \/\/ Minimum servo position<\/p>\n

int maxPulse = 2500;\u00a0 \/\/ Maximum servo position<\/p>\n

int pulse = 0;\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/\/ Amount to pulse the servo<\/p>\n

int increment = 50; \/\/there are 40 gear teeth of planar movement<\/p>\n

\/\/the servo has 2000 explicit values<\/p>\n

\/\/this means 1 tooth is our greatest resolution of movement<\/p>\n

\/\/ergo, pulse50 = 1 tooth<\/p>\n

\/\/so if we move 5 times\/sec, which is 250pulse\/sec<\/p>\n

\/\/the total render time is 8 seconds<\/p>\n

int movePerSec = 5; \/\/ how quickly we are rendering the model<\/p>\n

int delayTime = 10000 \/ movePerSec; \/\/determines proper delay<\/p>\n

\/\/pixels<\/p>\n

int incomingBytes[9]={255,255,255,255,255,255,255,255,255}; \/\/set all pins to white<\/p>\n

int currentPinVal[9];<\/p>\n

int pixelPin=9; \/\/set pixel\u00a0 pin<\/p>\n

long lastPulse = 0;\u00a0\u00a0\u00a0 \/\/ the time in milliseconds of the last pulse<\/p>\n

int refreshTime = 20; \/\/ the time needed in between pulses<\/p>\n

int analogValue = 0;\u00a0 \/\/ the value returned from the analog sensor<\/p>\n

int analogPin = 0;\u00a0\u00a0\u00a0 \/\/ the analog pin that the sensor’s on<\/p>\n

void setup(){<\/p>\n

pinMode(servoPin, OUTPUT);\u00a0 \/\/ Set servo pin as an output pin<\/p>\n

pinMode(pixelPin, OUTPUT);<\/p>\n

pulse = minPulse;\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/\/ Set the motor position value to the minimum<\/p>\n

Serial.begin(9600);<\/p>\n

}<\/p>\n

void loop(){<\/p>\n

if(Serial.available() > 0)<\/p>\n

{<\/p>\n

incomingBytes[8]=Serial.read(); \/\/just read the 9th pixel<\/p>\n

\/\/get values & map to usable servo data<\/p>\n

for(i=0;i<9;i++)<\/p>\n

{<\/p>\n

\/\/incomingBytes[i]=Serial.read();\u00a0\u00a0 \/\/get pixel values from Processing<\/p>\n

currentPinVal[i] = map(incomingBytes[i], 0, 255, 500, 2500); \/\/change brightness value to depth<\/p>\n

Serial.print(“I received: “);<\/p>\n

Serial.println(incomingBytes[i]);<\/p>\n

}<\/p>\n

\/\/place servo at first position<\/p>\n

digitalWrite(servoPin, HIGH);\u00a0\u00a0 \/\/ Turn the motor on<\/p>\n

delayMicroseconds(pulse);\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/\/ Length of the pulse sets the motor position<\/p>\n

digitalWrite(servoPin, LOW);\u00a0\u00a0\u00a0 \/\/ Turn the motor off<\/p>\n

lastPulse = millis();\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/\/ save the time of the last pulse<\/p>\n

}<\/p>\n

\/\/delay(100);<\/p>\n

\/\/pulse = map(incomingByte, 0, 255, minPulse, maxPulse); \/\/changing brightness value to servo position<\/p>\n

\/\/ pulse the servo again if rhe refresh time (20 ms) have passed:<\/p>\n

\/\/TO ADD: conditional servo reset to 500 & resetting magnets back on<\/p>\n

\/\/ also, check if all magnets are off<\/p>\n

if (millis() – lastPulse >= refreshTime)<\/p>\n

{<\/p>\n

if(pulse >= currentPinVal[0])\/\/if we are have passed the pin’s value<\/p>\n

{<\/p>\n

digitalWrite(pixelPin, LOW)\/\/turn off magnet through transistor<\/p>\n

}<\/p>\n

else<\/p>\n

{<\/p>\n

digitalWrite(servoPin, HIGH);\u00a0\u00a0 \/\/ Turn the motor on<\/p>\n

delayMicroseconds(pulse);\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/\/ Length of the pulse sets the motor position<\/p>\n

digitalWrite(servoPin, LOW);\u00a0\u00a0\u00a0 \/\/ Turn the motor off<\/p>\n

lastPulse = millis();\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/\/ save the time of the last pulse<\/p>\n

pulse += increment;<\/p>\n

delay(delayTime);<\/p>\n

}<\/p>\n

}<\/p>\n

}<\/p>\n","protected":false},"excerpt":{"rendered":"

It’s 8:08 AM… yes people, 808. and i did consume 8+8 caffeinated beverages over the course of the last 22 hours I’ve been P-Comping. I’m not great on documentation after I crash out, but here’s some Arduino code. int incomingByte = 0; \/\/servo variables int servoPin = 2;\u00a0\u00a0\u00a0\u00a0 \/\/ Control pin for servo motor int […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18,1],"tags":[12,14,322,16],"class_list":["post-141","post","type-post","status-publish","format-standard","hentry","category-physical-computing","category-uncategorized","tag-itp","tag-magnet","tag-physical-computing","tag-pin-model"],"_links":{"self":[{"href":"http:\/\/mikelberman.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/141","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/mikelberman.com\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/mikelberman.com\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/mikelberman.com\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/mikelberman.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=141"}],"version-history":[{"count":2,"href":"http:\/\/mikelberman.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/141\/revisions"}],"predecessor-version":[{"id":143,"href":"http:\/\/mikelberman.com\/blog\/index.php?rest_route=\/wp\/v2\/posts\/141\/revisions\/143"}],"wp:attachment":[{"href":"http:\/\/mikelberman.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=141"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/mikelberman.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=141"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/mikelberman.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=141"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}