I'm really new to Arduino's, and recently got my Uno R3. Anyways I went ahead and eventually got the LCD and potentiometer working. However I decided to add an LM35 temperature sensor, the thing is that all my pins for 5V and GND have already been used up, so I connected to one of the existing 5V connections from the potentiometer and arduino(I put it one pin above the 5v.) I fired up the code but it displayed 0.00 as the temperature. Here is a picture of the setup, I haven't put in the GND wire from the sensor. Can someone please explain to me how I will be able to share a GND and 5v connection? I'm connected via USB so I don't think power distribution should be an issue.
My 16x2 LCD also has a backlight feature.