[Nexus 4 General] ttheodorou:
Tutorial irblaster diy

Turorial IR BLASTER DYI.

what you would need:

1. soldering iron

2. 3.5 mm jack preferably with plastic cover.

3. 2 infrared leds led specs by MerynGoesAndroid

NOTE that in the pucture there is only 1 led you will need 2!!

4. irdroid app

5.insulation tape [IMG="g"]http://www.goldenbrown.com.au/contents/media/t1%20tapes,%20insulation%20tapes.jpg[/IMG]

I will say some words about the ir blaster and the schematics but if you want you can skip this and go to

building instructions

.

The first thing you need to understand is how 3.5mm jack is wired.

the 3 areas you see in the picture 1 is left audio, right audio and ground. the phone will use left and right audio channels to feed electricity to the ir blaster to work.

in picture 2 we can see how the external areas are wired internally.

View attachment 2957645

in this picture you can see where the right/left audio and ground are located on the 3.5 mm jack.

in this picture the led is explained. the first schematic is the symbol of the led in electronics. i will not explain what the anode and cathode is or anything else about led because you don't need it in this tutorial but if you are interested click here

the scematic of the irblaster:

[IMG="schem"]http://2.bp.blogspot.com/-XHbP5QGlV80/Tjw6bXvRqiI/AAAAAAAACQ8/yx1ijpAvrlk/s320/pic3.png[/IMG] WITHOUT the resistor.

Building instructions:

The first thing you want to do is pull the plastic cover of the 3.5 mm jack (or unscrew the metal cover) so you can see the inside connections. Then cut the ground of the 3.5 mm jack. We don't need it. you can do it by hand or with a tool. for me it worked by hand.

After that put the long leg of the led in the left audio channel hole of the 3.5mm jack and the short leg on the right channel. take the other led and put the long leg of the led on the right audio channel and the short leg on the left. In the end you must have one short leg and one long leg in each hole of the right and left audio channel of the 3.5 mm jack.

After that solder the right and left audio channels with the led legs. It should look like this:

then put insulation tape in between the two legs of led1 and led2 that are soldered together so you eliminate short circuit probability, and you are done!

Another way to go is to twist the two led together. What i mean is twist the long leg of the led1 with the short leg of led2 and the short leg of the led1 with the long leg of led2. after that solder the one twisted leg on the left channel and the other on the right.

TIP. you can use the plastic of the 3.5 mm jack to cover the ir blaster.

After that install irdroid, plug the irblaster on the phone open irdroid

hit menu and update db, choose your tv and you should be ok.

Make sure that the volume is all the way up because otherwise it might not work.

The range of the blaster should be about 1 meter or so...

if you have any questions i will be happy to answer.

I think that covers it. This is my first tutorial so if you have any suggestions to make it better your welcome to say it!

Good Luck guys!!

a BIG thanx to hercules16 for the idea and pictures of his creation and MerynGoesAndroid for the help he gave me

P.S. Neither MerynGoesAndroid nor i could work the ir blaster with our nexus 4 so keep that in mind.

BUT

it worked with other devices.