Sending the Signals4

7/30/2019 Sending the Signals4

1/5

Step 4: Sending the Signals

Now once you have the codes that you want, and have uploaded the program with the signal you want

to send, all you have to do is hook up the IR LED to pin 13 and then to ground similar to the schematic

in the picture. You don't need the resistor if you have a Duemilanove Arduino because it has a built in

resistor for PIN 13 so you don't have to worry.

This can also be done with an ATTINY 8 pin microcontroller to cut down on size. I have one but I'm not

sure how to use it yet.

Now I will be showing you a real-world example on how to do this.

AGAIN, THIS IS NOT MY CODE, I just copied and pasted to make it easier to understand.

So I got this code when I pressed the channel up button on my Comcast remote. This is the kind of

remote that you will have if you have the small black boxes that use the small black remotes. They act

as an analog to digital converter box that only can change channels.

Here is the Serial Monitor code:

Received:

OFF ON

36328 usec, 280 usec

820 usec, 300 usec

1580 usec, 320 usec

640 usec, 240 usec

2740 usec, 240 usec

1280 usec, 240 usec

1240 usec, 240 usec

1120 usec, 240 usec

2600 usec, 240 usec


840 usec, 240 usec

980 usec, 240 usec

700 usec, 240 usec

700 usec, 240 usec

720 usec, 240 usec

2460 usec, 260 usec

(/files/deriv/FUC/KT35/GVP28W2Z/FUCKT35GVP28W2Z.LARGE.jpg)

About This Instructable

Posted:

Dec 3, 2011

License:

13,849 views

26 favorites

(/member/Wally_Z/)

Wally_Z

(/member/Wally_Z/)

My Youtube

(http://www.youtube.com/user/wj

Follow

I like to tinker with electronics. I like to

mod, hack, and learn how something works by

taking it apart.

11

Bio:

(/id/Giant-USB-Flash-Drive)

(/id/Arduino-Police-Lights-

ATMega-2650-Version)

(/id/How-to-make-Arduino-

Police-Lights)

More by Wally_Z

Tags:

(/)

let's make

share what you make >

(/about/submit.jsp))

Explore (/tag/type-id/) Create (/about/submit.jsp) Contests (/contest/) Community (/community/) Login (/you/)
http://www.instructables.com/files/deriv/FUC/KT35/GVP28W2Z/FUCKT35GVP28W2Z.LARGE.jpghttp://www.instructables.com/http://www.instructables.com/tag/type-id/http://www.instructables.com/about/submit.jsphttp://www.instructables.com/contest/http://www.instructables.com/community/http://www.instructables.com/you/http://googleads.g.doubleclick.net/aclk?sa=L&ai=CEVNl6nFnUZ3kIYTKsQfAs4DIAfax-KADAAAQASDopqUDUK_izLgHYM3w7oCsA8gBAuACAKgDAcgDnQSqBMABT9CxWdwn_60IUc8N86kXoMAZst-25IcAVjspMtHaYFvi_lsKRxTkxBmWC7_nijumCWgo3-MDkEjpmJuTwQb1Ue-APzIFQGl_XUOqc7si5rMf7j7bgq7Kj8huN77ZxdnwHnmNWXAkhSXAXCCjQ1nLblEUcRpt_PSHWUWA-vl1XMrxyxKuOONWZrjhlqRmNTGvk7bD1g9lqEnoOZLz9ndqBMmNwggzGhpIpDYESOKkCWIMPUmbiCLBYEhXwDwzKMQl4AQBoAYU&num=0&sig=AOD64_0ZAslYf2xwY1jUc6qhDzGQl0bLIQ&client=ca-pub-1783560022203827&adurl=http://www.instructables.com/contest/indestructibles/http://www.instructables.com/you/http://www.instructables.com/community/http://www.instructables.com/contest/http://www.instructables.com/about/submit.jsphttp://www.instructables.com/tag/type-id/http://www.instructables.com/http://www.instructables.com/group/techshop/http://www.instructables.com/group/familyhandyman/http://www.instructables.com/group/123d/http://www.instructables.com/about/submit.jsphttp://www.instructables.com/http://www.instructables.com/id/How-to-make-Arduino-Police-Lightshttp://www.instructables.com/id/Arduino-Police-Lights-ATMega-2650-Versionhttp://www.instructables.com/id/Giant-USB-Flash-Drivehttp://www.youtube.com/user/wjz10595http://www.instructables.com/member/Wally_Z/http://www.instructables.com/member/Wally_Z/http://www.instructables.com/id/How-to-control-your-TV-with-an-Arduino/step4/Sending-the-Signals/#statsModalhttp://www.googleadservices.com/pagead/aclk?sa=L&ai=CfxkQ6nFnUZfUIvDGsQeMmoD4A5uk0qcDu-mYlh7c2R4QASDopqUDUNDhxtoDYM3w7oCsA6ABr8_E_gPIAQLgAgCoAwHIA50EqgTJAU_QNO1FPO6nRIx7CDxo7_omNsxgIAF863oE7rhBmaicyFN3hG9yf5oygjPETSTtJk9KSGFxFIc5F_gziuAfYvIA-_tP8f2M2TqvSZf9_APga2ve1OEtDfzi7Tggy994YGPGNsscWVBb7L3TRSLOrqDIxq7-rYJih8V6ojhKdMqYtJXeslqIhofkLbqHw13oo8RBS1USpOPyYW3xEupOKbWWPAkDknxjizINDOJjKR0IGuCtCehg6fPc-OgTLpxRVbkcNBAcfYzrqeAEAYgGAaAGAoAHubC7AQ&num=1&cid=5GhqAnmYKkrEt0kh3gTVlS23&sig=AOD64_12qSdYsMWrG2t2GcC7uvC2w6EJnw&client=ca-pub-1783560022203827&adurl=http://www.tekscan.com/flexiforce/force-transducer.htmlhttp://www.instructables.com/files/deriv/FUC/KT35/GVP28W2Z/FUCKT35GVP28W2Z.LARGE.jpghttp://googleads.g.doubleclick.net/aclk?sa=L&ai=CEVNl6nFnUZ3kIYTKsQfAs4DIAfax-KADAAAQASDopqUDUK_izLgHYM3w7oCsA8gBAuACAKgDAcgDnQSqBMABT9CxWdwn_60IUc8N86kXoMAZst-25IcAVjspMtHaYFvi_lsKRxTkxBmWC7_nijumCWgo3-MDkEjpmJuTwQb1Ue-APzIFQGl_XUOqc7si5rMf7j7bgq7Kj8huN77ZxdnwHnmNWXAkhSXAXCCjQ1nLblEUcRpt_PSHWUWA-vl1XMrxyxKuOONWZrjhlqRmNTGvk7bD1g9lqEnoOZLz9ndqBMmNwggzGhpIpDYESOKkCWIMPUmbiCLBYEhXwDwzKMQl4AQBoAYU&num=0&sig=AOD64_0ZAslYf2xwY1jUc6qhDzGQl0bLIQ&client=ca-pub-1783560022203827&adurl=http://www.instructables.com/contest/indestructibles/


2/5

700 usec, 240 usec

700 usec, 240 usec


820 usec, 240 usec

1660 usec, 240 usec

700 usec, 260 usec

2740 usec, 240 usec

1240 usec, 240 usec

1260 usec, 240 usec

1100 usec, 240 usec

2620 usec, 240 usec


840 usec, 220 usec

2080 usec, 240 usec1780 usec, 260 usec

700 usec, 240 usec

700 usec, 240 usec

2480 usec, 240 usec

700 usec, 240 usec

700 usec, 240 usec

Here is the code that I made from the raw data by putting the code in:

// This sketch will change the channel every ten seconds so you can be doing other things

//while watching tv and not having to change the channel, like being on a laptop and having

//it cycle through the channels so you have free hands.

//We all know pressing a button is so hard, so why not make it automated?

int IRledPin = 13; // LED connected to digital pin 13

// The setup() method runs once, when the sketch starts

void setup() {

// initialize the IR digital pin as an output:

pinMode(IRledPin, OUTPUT);

Serial.begin(9600);

}

void loop()

{

SendChannelUpCode();

delay(20*1000); // wait twenty seconds (20 seconds * 1000 milliseconds) Change this value fordifferent intervals.

}

// This procedure sends a 38KHz pulse to the IRledPin

// for a certain # of microseconds. We'll use this whenever we need to send codes

void pulseIR(long microsecs) {

// we'll count down from the number of microseconds we are told to wait

cli(); // this turns off any background interrupts

while (microsecs > 0) {

// 38 kHz is about 13 microseconds high and 13 microseconds low

digitalWrite(IRledPin, HIGH); // this takes about 3 microseconds to happen

delayMicroseconds(10); // hang out for 10 microseconds

digitalWrite(IRledPin, LOW); // this also takes about 3 microsecondsdelayMicroseconds(10); // hang out for 10 microseconds

// so 26 microseconds altogether

microsecs -= 26;

}

sei(); // this turns them back on

}

void SendChannelUpCode() {

// This is the code for the CHANNEL + for the TV COMCAST

delayMicroseconds(36328); //Time off (LEFT column)

pulseIR(280); //Time on (RIGHT column)


3/5

delayMicroseconds(1240);

pulseIR(240);


pulseIR(240);


pulseIR(240);


pulseIR(240);


pulseIR(240);


pulseIR(240);


pulseIR(240);delayMicroseconds(700);

pulseIR(240);


pulseIR(240);


pulseIR(240);


pulseIR(240);


pulseIR(240);


pulseIR(240);


pulseIR(240);


pulseIR(240);


pulseIR(260);


pulseIR(240);


pulseIR(240);


pulseIR(240);


pulseIR(240);


pulseIR(240);

delayMicroseconds(12720);pulseIR(260);


pulseIR(220);


pulseIR(240);


pulseIR(260);


pulseIR(240);


pulseIR(240);


pulseIR(240);


pulseIR(240);delayMicroseconds(700);

pulseIR(240);

}

Remove these ads by Signing Up (/account/gopro?sourcea=removeads&nxtPgName=Sending+the+Signals&nxtPg=/id/How -to-

control-your-TV-w ith-an-Arduino/step4/Sending-the-Signals/)

How to control your TV with an Arduino! by Wally_Z (/member/Wally_Z/)

Download (/id/How-to-control-your-TV-with-an-Arduino/?download=pdf) See All (/id/How-to-control-your-TV-with-an-Arduino/?ALLSTEPS)

(/id/How-to-control-your-TV-with-an-Arduino/step3/Interpreting-the-Signals/) Jump To 4 Steps

Favorite
http://www.instructables.com/id/How-to-control-your-TV-with-an-Arduino/step3/Interpreting-the-Signals/http://www.instructables.com/id/How-to-control-your-TV-with-an-Arduino/?ALLSTEPShttp://www.instructables.com/id/How-to-control-your-TV-with-an-Arduino/?download=pdfhttp://www.instructables.com/member/Wally_Z/http://www.googleadservices.com/pagead/aclk?sa=L&ai=CC2XH6nFnUZrWIoG7sQez3YDIBMyL-p4EzIjTlm7AjbcBEAEg6KalA1DqgdcYYM3w7oCsA6AB1NqF0QPIAQLgAgCoAwHIA50EqgTQAU_Qn-7McLxntAXHCABrQ3E_91kQZ3nbUGrZoxxwmC1NlXJtkESp-r1gWxj_q51TWRmGZJusT2JR0koA737aO5Bp3zlmfloOKU6JqwtMv_n5fmq0ZZJjkz5esmwaNBToK3tLBlN7U2lj3P3a5L_Hag1o7Lil4HCqWMkhgHz7T6pS6EEcybybE1tqq5XrBgBr-3a8Yc4-YLHO_rZD6lpzAVRWPIfqs0inHxoztX0SX655jdeeSWp7EtTf-FGBJqvoR9OZVpE7EnKyd80i3lLfAU7gBAGIBgGgBgKAB5Sl-i4&num=1&cid=5GiTsmr7uzGBXj_thFEJpNM4&sig=AOD64_0rr-BLND40QzVFmupFy7451SeNwg&client=ca-pub-1783560022203827&adurl=http://www.miniinthebox.com/led-light-bulbs_c3115%3Flitb_from%3Dpaid_adwords_display%26adword_mt%3D%26adword_ct%3D29542846076%26adword_kw%3Dhome%2520led%2520lighting%26adword_pos%3Dnone%26adword_pl%3Dwww.instructables.com%26adword_net%3Dd%26adword_tar%3D&nm=1http://www.googleadservices.com/pagead/aclk?sa=L&ai=CIDem6nFnUbTlIpCtsQez44HoA7mj5JUDodvjijfAjbcBEAEg6KalA1CrhLaABWDN8O6ArAOgAYHktf4DyAEC4AIAqAMByAOdBKoEywFP0BSN0PsCRWEocJLB8yYFTDxk-YmTGWLohGlJsk8nYeLugvFxEm81x9-mBCh_iCQNObIHpkikPAlWE3DL3fH5eLiySj2-dv4TPagzM4Q6Ik4bv0ASVB_uwROcre7t5Fts_BUtxgWosL7uXBeih6Q09vKq0PhGon4pcI3a2CUI55Kb8iJ75-7vwWQt0finqaaJM28xk-HOC8S97nDrFrQXCH0FgzppGKJD_WNgtkZNEjQr-JNOgsXwGGGHZI7V7Uzkj33QNtWR_0zqNOAEAYgGAaAGAoAH55vKAQ&num=1&cid=5GhV5PdOn_-fnOrsCOzBDTQQ&sig=AOD64_125GF74s4VMuBGRqvLGwVCT48GxA&client=ca-pub-1783560022203827&adurl=http://PIDTuning.net/learn-pid-control.htmlhttp://www.instructables.com/account/gopro?sourcea=removeads&nxtPgName=Sending+the+Signals&nxtPg=/id/How-to-control-your-TV-with-an-Arduino/step4/Sending-the-Signals/


4/5

Previous (/id/How-to-control-your-TV-with-an-Arduino/step3/Interpreting-the-Signals/)

Post Comment

(/member/c1c2c3/)

Oct 7, 2012. 3:01 AM Reply (CYV54J4H7UQJLDX)

5

(/member/Wally_Z/)

Dec 5, 2012. 9:01 AM Reply (CO9LXFZHABC7WK2)

(/member/jabujavi/)

Jun 24, 2012. 7:22 AM Reply (CMK9D74H3QFJC35)

(/member/carlos.camposalcocer/)

Jul 18, 2012. 7:26 PM Reply (C564I1MH4I7VYE8)

(/member/jabujavi/)

Jul 19, 2012. 1:30 AM Reply (CFV7CLCH4AGKNKM)

(/member/wmain/)

May 1, 2012. 8:50 PM Reply (CUP2YVGH1PISXEP)

c1c2c3 (/member/c1c2c3/) says:

Do you need a resistor to go to the IR led?

Wally_Z (/member/Wa lly_Z/) (author) says:Not if you hook the IR LED up to pin

13. Pin 13 on MOST arduino's

already has a resistor on it. If you're

not sure if it has a resistor, you

should use a 100ohm just to be

safe.

jabujavi (/member/jabuja vi/) says:

I have a questions.

hy use delayMicrosecond and don't simply delay? The value of delay is in ms, is not?

carlos.camposalcocer (/member/carlos.camposalcocer/) says:

ms=milliseconds

us=microseconds

jabujavi (/member/jabuja vi/) says:

FAIL

Thanks, I work with us many times

and in this case didn't see it...

wmain (/member/wmain/) says:

You could define a typedef as

ypedef struct i rCode {

int off;

int on;

} codes[34];

codes[0] = {36328, 280};

.

.

.

codes[33] = {700, 240};

hen use this code to send it

for (cx=0; cx


5/5

About Us

ho We Are (/about/)

Advertise (/advertise/)

Contact (/about/contact.jsp)

obs (/community?categoryGroup=marketplace&category=jobs_internships)

Help (/community?categoryGroup=Help)

Find Us

Facebook (http://www.facebook.com/instructables)

Youtube (http://www.youtube.com/user/instructablestv)

Twitter (http://www.twitter.com/instructables)

Pinterest (http://www.pinterest.com/instructables)

Resources

or Teachers (/ teachers/)

Artists in Residence (/group/air/)

Sponsorships (/sponsorship/)

orums (/community/)

Answers (/tag/type-question/)

Mobile

Download our new apps for

iOS and android!

Android

(https://play.google.com/store/apps/details?

id=com.adsk.instructables)

iOS

(https://itunes.apple.com/app/instructables/id586765571)

Visit Our Store (http://store.instructables.com/)

Go Pro Today (/account/gopro?sourcea=footer)

let's make(http://usa.autodesk.com/adsk/servlet/pc/index?id=20781545&siteID=123112)

Terms of service (/tos.html) | Privacy Policy (http://usa.autodesk.com/privacy/) | Mobile Site (http://m.instructables.com)
http://m.instructables.com/http://usa.autodesk.com/privacy/http://www.instructables.com/tos.htmlhttp://usa.autodesk.com/adsk/servlet/pc/index?id=20781545&siteID=123112http://www.instructables.com/account/gopro?sourcea=footerhttp://store.instructables.com/https://itunes.apple.com/app/instructables/id586765571https://play.google.com/store/apps/details?id=com.adsk.instructableshttp://www.instructables.com/tag/type-question/http://www.instructables.com/community/http://www.instructables.com/sponsorship/http://www.instructables.com/group/air/http://www.instructables.com/teachers/http://www.pinterest.com/instructableshttp://www.twitter.com/instructableshttp://www.youtube.com/user/instructablestvhttp://www.facebook.com/instructableshttp://www.instructables.com/community?categoryGroup=Helphttp://www.instructables.com/community?categoryGroup=marketplace&category=jobs_internshipshttp://www.instructables.com/about/contact.jsphttp://www.instructables.com/advertise/http://www.instructables.com/about/

Documents

Sending the Signals4