{"id":3612,"date":"2020-03-31T21:04:54","date_gmt":"2020-03-31T21:04:54","guid":{"rendered":"http:\/\/rodmilstead.com\/pt\/?page_id=3612"},"modified":"2020-03-31T22:31:14","modified_gmt":"2020-03-31T22:31:14","slug":"arduino-photoresistor-setup","status":"publish","type":"page","link":"https:\/\/rodmilstead.com\/pt\/arduino-photoresistor-setup\/","title":{"rendered":"Arduino Photoresistor setup"},"content":{"rendered":"

\"\"<\/a>This assignment is an intro to working with a different kind of an input: a photoresistor. Instead of simply pushing a button, a sensor like this makes your program more dynamic.<\/p>\n

Photoresistors measure the amount of light; “A\u00a0photoresistor<\/b>\u00a0is a type of resistor whose resistance decreases when the intensity of light increases. In other words, the flow of electric current through the\u00a0photoresistor <\/b>increases when the intensity of light increases.”<\/em><\/p>\n

So, the more light, the lower the resistance.<\/strong><\/p>\n

Photoresistors (also called light dependent) resistors are used to adjust brightness in displays or to cause a streetlight turn on or off when a chosen light level is detected.<\/p>\n

This resistance can be measured as a number that the Arduino can read.\u00a0 This number can be used in an if\/else statement with greater than, less than symbols to control when something happens in a program.<\/p>\n

\n

Click here for a video description of this assignment.<\/strong><\/a><\/p>\n

Here’s what you have to do (including answering questions about the program and circuit):<\/strong><\/p>\n

    \n
  1. look at the sample circuit below and build it in Tinkercad.com<\/li>\n
  2. copy and paste the sample code (below the image) into your Tinkercad program (delete whatever codes is there first).\u00a0 No typing. Really. Just copy and paste.<\/strong><\/em><\/li>\n
  3. Run the program and be sure to click on Serial Monitor below your code.<\/li>\n
  4. Click here to answer questions about your code and circuit.\u00a0 You will also turn in your code URL here.<\/a><\/li>\n<\/ol>\n

    \"\"<\/a><\/p>\n

    Copy this sample code and paste into your Photoresistor circuit -don’t forget to include those two curly braces at the on the last two lines:<\/strong><\/p>\n

    int light=0;
    \nint lightVal;
    \nint red=13;<\/p>\n

    void setup()
    \n{
    \npinMode (red, OUTPUT);
    \nSerial.begin(9600);
    \n}<\/p>\n

    void loop()
    \n{
    \nlightVal = analogRead(light);
    \nSerial.println (lightVal);
    \nif (lightVal>=300)
    \n{
    \ndigitalWrite (red, HIGH);
    \n}<\/p>\n

    else
    \n{
    \ndigitalWrite (red, LOW);
    \n}
    \n}<\/p>\n

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

    This assignment is an intro to working with a different kind of an input: a photoresistor. Instead of simply pushing a button, a sensor like this makes your program more dynamic. Photoresistors measure the amount of light; “A\u00a0photoresistor\u00a0is a type of resistor whose resistance decreases when the intensity of light increases. In other words, the … Continue reading Arduino Photoresistor setup<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-3612","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/rodmilstead.com\/pt\/wp-json\/wp\/v2\/pages\/3612","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rodmilstead.com\/pt\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/rodmilstead.com\/pt\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/rodmilstead.com\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/rodmilstead.com\/pt\/wp-json\/wp\/v2\/comments?post=3612"}],"version-history":[{"count":6,"href":"https:\/\/rodmilstead.com\/pt\/wp-json\/wp\/v2\/pages\/3612\/revisions"}],"predecessor-version":[{"id":3620,"href":"https:\/\/rodmilstead.com\/pt\/wp-json\/wp\/v2\/pages\/3612\/revisions\/3620"}],"wp:attachment":[{"href":"https:\/\/rodmilstead.com\/pt\/wp-json\/wp\/v2\/media?parent=3612"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}