Read the datasheets

The generic brand might also use substandard flash memory that is much slower then the Transcend card. Bigger cards tend to use slower memory in order to keep costs down.

Hi. What type of temperature sensor are you looking for? There are a vast array of possible types. The basic ones are thermistors (They are resistors that change their resistance based on temperature), thermocouples (a type of sensor that emits a certain voltage based on temperatures), active ICs th...

Cleaner way of setting buffer to zero:

Not my book.... The 16f84 and 16f876A should have almost identical registers and instructions. So it'll just be a matter of taking the code that is given and checking it against the 876 data sheet and doing changes as necessary. The circuit should be similar as well. Might be easier just to use a bu...

I understand now. Does the controller not have a ability to update the display ram before refreshing the screen?

What will you be using to generate the sound (Speaker, buzzer, etc.)

No.

Read http://merwin.bespin.org/t4a/specs/nokia_rtttl.txt and http://en.wikipedia.org/wiki/Ring_Tone_ ... r_Language. From there it won't be that hard to make a simple string parsing routine that will read each note and play it. You'll need to figure out what frequency each note/octave is.

The refresh rate of an LCD is how long it takes for a single pixel to change from one state to another.

That is just the speed of the controller. If the refresh rate is given it will be something in the miliseconds or hertz (Like 50ms or 60Hz)

What kind of tones do you want to generate (Specifications please)

You'll have to check on the GLCDs specifications to find out what is "normal" for it. Some GLCDs (especially cheaper ones) have very slow refresh rates.

Everything has compatibility issues with Vista. Main reason is that drivers for Vista need to be certified by Microsoft in order to work correctly, and the certification costs a small fortune!

What is the maximum number you are expecting? If it is less the 255 you can easily to it without needing to convert between the number by just sending the character with the same ascii value as the number.

According to the manual the atoi function will give a incorrect result if there are any non-numeric characters in the string.