Please tell us how to run a 2X16 LCD display with a couple of resistors and a Zener diode.
I must be using the wrong ones.
Mike2545: duffy is referring to LCD panel meter and not simple LCD display
I think the resistors and zener diode are for calibration.
f0xy: i agree with Mike2545. I think you should get an LCD 16x2 which displays Pressure in first line of LCD and temperature in the second, Displaying bars on a simple LCD will be very though. You can use a microcontroller which has a built in ADC such as PIC18F4220 or something similar (I find PIC18 easier to code with MPLAB C18 compiler in C language).
Since this controller has one ADC, you might need to poll readings in a loop (for pressure and then for temperature).
a simple pesudocode will be like:
1. Initialize LCD display module
2. Initialize ADC module
3. Write "Pressure: " on First line of LCD
4. Write "Temperature:" on Second line of LCD
5. Read pressure value from ADC
6. Scale it and convert to ASCII characters and display on LCD at particular location (After the string "Pressure:")
7. Read temperature value from ADC
8. Scale it and convert to ASCII characters and display on LCD at particular location (After the string "Temperature:")
9. Goto Step 5 again and so on
As for hardware, you will need a programmer to burn code onto the microcontroller or you can borrow from your friend if this is the only project you are going to do
you will need an LCD module 16x2 or 20x2. (where 16 means character in a row and 2 means total rows)
A crystal (oscillator) 4MHz would be enough.
2 non-polar 33pF capacitors
a 10K ohm resistance for /MCLR pin
and a 7805 regulator with maybe a small heatsink.
You can post your progress here and i think a lot of people will help you with the rest