I made the 18f4550 audio spectrum analyser,and i have some problems.
Firstly,everythink is fine,all the point are showed(the first point is not showed),but after 10-15 min,the problems appear:some number of points are not showed(the points coresponding to the lower frequency),or the display show nothing.
If i let the circuit under tension,nothing happens.
If i disconnect the supply,and then i connect the supply(like a reset) the circuit seems that work normally,then after 10 min the problem appears again,so on so for.
I put 2 video for show these problems,that can be founded at links:http://www6.zippyshare.com/v/59823411/file.htmlhttp://www6.zippyshare.com/v/16763255/file.html