Analog input with ADC

[andres]

Hi there. I am finally getting analog data from a ldr sensor connected via the ADC Pi board from AB electronics. Being a noob it took a bit of tinkering, but it's working now
Now, what would be the best way in your opinion of controlling graphics with this data? I thought of maybe modifying omxplayer but it seems to be daunting to integrate the python script that reads the data to c++. Same applies for openFrameworks.
Any pointers would be greatly appreciated. I am very interested in the possibility of using the pi for audiovisual installations!

edit: if this is the wrong forum, my apologies.

[joan]

"controlling graphics" is vague. What do you want to do with the data received from the ADC?

[andres]

uhm I guess controlling the 'editing' so skipping to certain parts of a video or image sequence when a certain value is received.

[joan]

Your post mentions a ldr connected to an ADC. I took ldr to mean a light dependent resistor. Are you going to use the ldr readings to control a video? If so, how?

[andres]

the ldr was just to see if I could get analog readings into the pi. Ideally I would want my program to work with piezo or other touch/vibration sensors... I would like to either map those values to frames of my animation, or use threshold values that would skip to a certain part of the animation.

[techpaul]

First work out getting the ADC part working and what your range of values will be, then look at controlling animation, then work out a method to marry the two parts together.

[joan]

First work out getting the ADC part working and what your range of values will be, then look at controlling animation, then work out a method to marry the two parts together.

I'd probably use the inputs to simulate key presses for omxplayer as a first attempt.

[andres]

Thanks for your replies! the ADC it's working, I've followed the tutorial over at elinux.com and I am getting analog readings via a python script... Next step is trying to figure out how to marry it to omxplayer or some other application to control video/image sequences. omxplayer is written in c++ I am guessing it's going to be a pain to marry with the python script (?)

[stef35]

have you succeeded?