thanks napos it worked ;D
but 2. problem is still alive...
Mr. MP, the program is full and professional but i knew the dragging technique you mentioned and it is not easy cuz i have exact dimensions(in cm)
i wonder if there is a dialogue window in eagle to type the size of the board directly...
this is my 1. problem:
as seen in the picture, pin 4(ground) and pin 8(+vcc) are absent on LM358 in eagle schematic editor...
so after switching the board mode there are no connections on these pins...
how can i solve this problem?
and this is my 2. problem:
how can i change the size of...
in schematic there is no connection point on pin 30...(no dot)
by the way for 0-20 v range it is said "R3-->0 ohm" ,0 ohm means shortcircuit and if we shortcircuit pin 30 and pin 31 we will read always "0000" i think...
according to the 7107 datasheet (Low Cost Digital Panel Meter Designs...
i think in this schematic there is a problem...
several times i tried to build this circuit as mentioned but always there is a stable value on displays and i realized the fault situation(that's my idea :-\)
we apply the + voltage on pin "1" but there is always a stable voltage on this pin...
it's hard to find a direct link to download matlab...
so use a file-sharing program(e-mule,dc++)...
you can easily find a zipped setup or .img file to burn...