Propeller QuickStart tv_text
libadman
Posts: 36
Hello to all!!! My name is Mike and I used to used this forum when I was more active with parallax products, now that I am once more I’ve forgotten some things and need to learn a few. My issue is I’m trying to get started with video from the propeller so I use tv_text demo because in the past I’ve used it and got it to work. I connect the 3 resistors to each other and to the respective pins then to a rca cable, I also ground the rca cable to the propeller. But no video- the 1.1k resistor I did sub with another value but I forget what I used I’m not home rn. I’ve tried changing the value to get close to 1.1k as I can. I live in Tampa and can’t find this resistor anywhere not even in Orlando. I was gonna try vga but with this not working and me not knowing why I rather stick with the basics. I also like to mentioned I used pins 12/13/14 on the propeller I have no ideal how to change the basepins because I do not understand the code clearly, but the base pins in the demo are suppose to be 12/13/14. Any help would be great. Thanks I’m advance.
Comments
You can use the formula (Rtotal = R1 + R2 +R3...) for series resistors. 1 kilohm resistors and 100 ohm resistors are both very common. One of each in series would equal 1.1 kilohm.
Paul
The exact value of the resistors doesn't matter. As long as they're very roughly correct, you'll get something on screen. Not that the P1 video output is particularly Hi-Fi to begin with.
Here's what I use
Here's what I use:
It preserves the 75-ohm source impedance.
-Phil