hello all

im doing some C coding, and has been VERY spoiled with using 2x16/4x20 & nokia 3310 LCD printf(with numbers)..

lately, I want to try out "getting" the value of read_adc() INTO 4 bit binary....so hardware will use 7447 + 4digit multiplexed CA 7seg... max output of ADC=1024(with 5V input)...RB0:RB3=7447, RB4:RB7=switching PER 7-seg...

how do I do it??

tia

 

Your value from the conversion will be in the range of 0 - 3FFh. You have to convert to BDC before you can put it out to the displays.

So far, all we know is that you're using a 7447. What other hardware have you got. What does your interface look like?

 

oh sorry for the VERY late reply...

im basically making -something- but I preffer doing it in "block sections" so to have less debugging when it finally works...

I have a PIC(F818) and due to lack of memory/flash, I opted to use BCD->7seg chip decoder(7447) .... using 10bit ADC so I get 1023 @ 5V input... (and its finally working now )

input of ADC comes from an analog front end (adjustable gain) output may range from a few mV to a max(maybe of 4V or less)..still working on this part

so *final*value of adc could be modified to output desired "reading"..through software and/or adjusting gain of front end(op-amps)

in short: analog front-end-->>adc input-->>CA 7-seg x4