Hello Everyone,

In my system I have 8 sensors connected to 8 lines of analog Mux(4051) and one amplifier is connected at the output of Mux. Also the output of Amplifier is connected to PIC.
I am using PIC16F871 to scan the 8 lines.

I am using 4MHz crystal. Here if I connect 0.5V (DC) as the input at one of the 8 lines, It gets amplified and PIC can see signal at the I/P lines.
but if I connect sensors it does not work. I even checked the sensor output at the amplifier output and it shows 5v.

I used Digital Mux before and it worked perfectly and now when I switched to Analog Multiplexers it does not work.

Do I need to connect anything extra to make the Analog Mux work with my PIC?
Kindly let me know if something is not clear.

Regards,

 

Why did you start this new thread? It doesn't have the schematics and details that are in your old thread.
I won't search for your old thread to see what is connected wrong.

 

The original thread is here:
http://forum.allaboutcircuits.com/showthread.php?t=31808

I see no reason why another thread that appears to be from the same poster, but under a different name, has to remain open.

 

Can the OP clarify this issue?