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Use an Arduino Clone to Control a TV

Learn how to use the TVout library to control a TV in this continuation of my first lesson on Arduino clones.

Use an Arduino Clone to Control a TV

If you are looking at this project, make sure you have seen my previous one, Getting Started with Arduino Clones. In this tutorial, we will continue from where we left off, and learn how to control a TV by wiring the Arduino clone to an RCA cable (only wiring is shown here, see TVout Google code site for how to program).

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Steps

Step #1:

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Use an Arduino Clone to Control a TV

WARNING: ATTEMPT AT YOUR OWN RISK! I have found that my Arduino clone is partially dysfunctional (will run TV and LED, but not speaker or LCD). Here are the parts that you will need. They are, from left to right, a 6 or 9 volt battery pack, misc. wire, an Arduino clone, a breadboard, and a 7805 voltage regulator.

Step #2:

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Use an Arduino Clone to Control a TV

Place the Arduino clone on the breadboard, with one row of pins on either side of the breadboard.

Step #3:

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Use an Arduino Clone to Control a TV

Now, on the "front" side of the breadboard, next to the Arduino clone, place the 7805 chip with the heatsink facing away from you.

Step #4:

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Use an Arduino Clone to Control a TV

Next, let's hook up the battery pack. Put the positive (red) probe into the same row as the far left pin of the 7805, and put the negative (black) probe into the negative bus (the line of pins with the blue line over it). Also, run a wire from the row with the middle pin of the 7805 to the negative bus, and run a wire from the right pin to the positive bus.

Step #5:

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Use an Arduino Clone to Control a TV

It's starting to get a tad more complex. Run wires from the positive bus to the rows with the pins labeled "VCC" and "AV," and run wires from the negative bus to the rows with both of the "GND" pins.

Step #6:

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Use an Arduino Clone to Control a TV

Nice job! The LED on the board should light up. If it doesn't, make sure that you have done all of the steps correctly, and that you soldered your clone correctly. Now, assemble a "parallel programmer," which is a device that hooks into a Windows or Linux computer (if it originally ran Windows) that will program this device. If you have a AVRISP or other programmer, then use that instead. Here is how to build a parallel programmer.

Step #7:

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Use an Arduino Clone to Control a TV

Now, let's build our first project! Collect the parts shown (LED, wire, and 330 ohm resistor).

Step #8:

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Use an Arduino Clone to Control a TV

See the wire on the right? Connect a wire from one negative bus to the other.

Step #9:

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Use an Arduino Clone to Control a TV

Now add a resistor from either pin 13 or pin B5 (depending on the model of your Arduino clone), and connect it off to a row with nothing else on it.

Step #10:

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Use an Arduino Clone to Control a TV

Last step before programming: place the long (+) probe of the LED into the same row as the resistor, and the short (-) probe into the new negative bus.

Step #11:

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Use an Arduino Clone to Control a TV

Here's an easy step. Once the parallel programmer is finished, just hook in into the back of your computer, and into the ISP pins on the Arduino clone (the 2x3 array of pins on the Arduino clone).

Step #12:

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Use an Arduino Clone to Control a TV
  • Now to working with the computer. On Windows, open Program Files, open the Arduino folder, and go into /hardware/Arduino/boards. (For Mac, check Applications, and for Linux, check where you installed it). Now, add this to the bottom of the file (retype it, it doesn't copy correctly).
  • atmega328pp.name=Arduino Clone with Parallel Programmer atmega328pp.upload.protocol=stk500 atmega328pp.upload.maximum_size=30720 atmega328pp.upload.speed=57600 atmega328pp.upload.using=parallel atmega328pp.bootloader.low_fuses=0xFF atmega328pp.bootloader.high_fuses=0xDA atmega328pp.bootloader.extended_fuses=0x05 atmega328pp.bootloader.path=atmega atmega328pp.bootloader.file=ATmegaBOOT_168_atmega328pp.hex atmega328pp.bootloader.unlock_bits=0x3F atmega328pp.bootloader.lock_bits=0x0F atmega328pp.build.mcu=atmega328p atmega328pp.build.f_cpu=16000000L atmega328pp.build.core=arduino

Step #13:

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Use an Arduino Clone to Control a TV

Now, open the Arduino IDE (get this from http://arduino.cc), go into Tools -> Board, and select the option "Arduino Clone with Parallel Programmer."

Step #14:

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Use an Arduino Clone to Control a TV
  • Finally, open the Blink program in the IDE (Open button, Basics, "Blink"), and download it onto the Arduino clone (Download button). If you are lucky, then you should be able to unplug the parallel programmer, and the LED should blink! Note: if you got any errors, make sure that the parallel programmer is not touching anything on your board and that you followed these steps correctly.
  • Congratulations! Look at the Arduino sample code and the tutorials on this website. For future reference: the pin that says "B0" = pin 8, "B1" = pin 9, etc.

Step #15:

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Use an Arduino Clone to Control a TV
  • Welcome back! Gather the following parts:
  • Arduino clone from Getting Started with Arduino Clones project
  • 2 resistors: 1k and 470
  • Solder-type RCA cable
  • Wire

Step #16:

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Use an Arduino Clone to Control a TV

Assuming that the wire is speaker wire or similar wire with 2 wires inside coating, strip the coating off of the wire, and strip both of the wires inside.

Step #17:

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Use an Arduino Clone to Control a TV

Connect the wires to the RCA cable. The black (-) wire goes to the taller connection, and the red (+) wire goes to the shorter connection.

Step #18:

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Use an Arduino Clone to Control a TV

Before we start wiring, get rid of the LED and resistor from the previous project.

Step #19:

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Use an Arduino Clone to Control a TV

Connect the 470 ohm resistor to digital pin 7 (D7), and the 1k ohm one to B1, or pin 9. Make their other ends go into the same unused row off to the side (sorry that the LED assembly is still on there in the picture).

Step #20:

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Use an Arduino Clone to Control a TV

Now, connect the RCA cable. The black wire goes to the negative bus, and the red wire goes in the same row that has the 1k and 470 ohm resistors both connected to it.

Step #21:

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Use an Arduino Clone to Control a TV

Program the Arduino clone, as in the previous project, with the NTSC demo code that comes with the TVout library, available here. (To install the code, just click the Open button in the Arduino IDE, and go to "TVout." Click on the code that you want to open. Then click the download button.)

Step #22:

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Use an Arduino Clone to Control a TV

Now, hook the yellow RCA cable up to the yellow input on your TV, and turn your TV to channel 2 or 3, depending on your TV. An image should appear, and your project should work! To restart the video, press the reset button on your Arduino clone.


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