Hmm , thank you .
Let's think , if i want to make it with 5V not 15V .
I just want to learn the main idea.
I think , if i learn the main idea , maybe i can go on with 15V.
In fact , i can change the output voltage from 1.67 V to 15V .
In this project we wanted to have good resolution , and we decided to get 15V from output.
As i said , let's think , the input changes 0-5V.
Thank you
By the way , my main project was to build an cell phone detector and i did it with a small circuit. In this circuit there are 2 same RF subcircuits ; one for the left side detection and the other side is for the right side detection.
We amplified the signals with LM358 and we may get output from 1.67 to 15V . ( with gain changing)
Finally we want to show the voltage change with the LCD bar graphs.
The first line of the LCD will be left channel and the second line will be the right channel .