Screen doesnt show me my message



I have connected 2 cables (->one from port 9 to vid cable with a 1000 Ω resistor between and second for port 7 to vid cable with a 400 Ω resistor between) and the ground pin with my rca connector's ground and I have connected my vid cable to my rca connector.

Here's the code:
#include <TVout.h>


TVout TV;


void setup() {
  // put your setup code here, to run once:
TV.start_render();


}

void loop() {
  // put your main code here, to run repeatedly:
TV.clear_screen();

TV.print_str(30,30,"Hello world");





}

Open in new window





my screen doesn't show the message "Hello World". Am I missing something?
LVL 1
Max DestinyAsked:
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Martin MillerCTOCommented:
Do you have access to an oscilloscope to confirm you have a signal from 9, both side of the resistor and to the RCA cable ?

Next, can you attach the Adruino pin's or link to it ?

Specific why are you connecting pin's 7 and 9 together with the resistors between? That seems ... ODD.

BTW, I  am an electrical engineer...   :-)
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Shaun VermaakTechnical SpecialistCommented:
Did you follow this guide originally?
http://www.instructables.com/id/TV-Out-with-Arduino/
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Martin MillerCTOCommented:
Shaun, Thanks for that link.

Here are things to check.  

Pin 7  is the VIdeo signal, confirm you have the 470 Ohm resistor connect to that.

Pin 9 I don't see the specific identification, but, you need to confirm that is the video Sync pin, and the 1k Ohm resistor is connected.

The Video Tap point is between these signal, so retract my previous "odd" comment.

GND Pin (Ground)  needs to connect to RCA shield.
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Max DestinyAuthor Commented:
my tv was not working well and as I woke up this morning I saw my message printed on the screen
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Max DestinyAuthor Commented:
my dad said the exact same thing last night he said that he couldn't understand the function of both digital pins
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Max DestinyAuthor Commented:
but then I showed him the circuit diagram
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Max DestinyAuthor Commented:
my tv i tested the project is old but the message still is being displayed , though not well.

So im gonna try this to our plasma Tv and see...
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Max DestinyAuthor Commented:
I wanna give you to each half of the points so how do I do that?<:)
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Max DestinyAuthor Commented:
thank you!!!!!!  for your time!!!!!!
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Martin MillerCTOCommented:
Thank you, and good Luck with your project!
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