help D/A converter

[matelda]

hi :
how i can make pic work as d/a converter
thanks

[Dwayne]

Hello Matelda,

M>>how i can make pic work as d/a converter
thanks<<

1. Make *sure* your chip has a ADC on it. Some pics do not. Some have comparators instead of AD's on them.
2. Make *sure* you are using the pin that has the AD on it.
3. Make *sure* you set your flags correctly to use the ADC.

Here is some code for a 12F675


number var word

ANSEL=0
CMCON=%00000111
TRISIO=%00001010

' Define ADCIN parameters
DEFINE ADC_BITS 10
DEFINE ADC_CLOCK 3
DEFINE ADC_SAMPLEUS 50

Loop:
ADCIN 1, number 'Read value.
'Output your data to whatever device you want
'LCDout number
goto Loop


Dwayne

[matelda]

thanks
but i want to convert digital signal to analouge using pic
matelda

[Melanie]

See the thread "HPWM problem". Use the techique I posted there with a Resistor and Capacitor to give you your DC output.

See also the thread "0-10V Output Needed" for an example circuit which I posted which includes not only that Resistor and Capacitor, but also how to typically buffer your output with an Op-Amp.

Using the search facility on this forum can work wonders.

[Dwayne]

hello Matelda,


M>>thanks
but i want to convert digital signal to analouge using pic
matelda<<

Ooops!! I am sorry Matelda, My dyslexic eyes turn the AD/DA around... please forgive me.

Dwayne