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Re: pic16f876 voltmeter
wizpic: what is happened ? what did you do to crack_ it ? what do you mean by crack_ (hardware crack_ - it is burned) or software problem ?
Your scheme is different from mine ?
So: your hex working fine with your pcb and don't work fine with my pcb (this is the problem ?)
Re: pic16f876 voltmeter
To measure a negative voltage I need to change the hardware input (introducing an Operational Amplifier) or could be done from software ?
My connections:
C1 = GND
C2 = pic amps input
C4 = pic volts input
Therefore volts dysplay is not real because of the resistor
If I...
Re: pic16f876 voltmeter
OK, in a few minutes !
I have asked rajudp to share too !
Added after 10 minutes:
wizpic, here is your last hex (new voltmeter1):
https://www.youtube.com/watch?v=etSUrDqR5Yc
If you find out the problem , could you please share your code ?
Thanks !
Added after 8...
Re: pic16f876 voltmeter
Here are those two hex files capture:
rajudp:
https://www.youtube.com/watch?v=YTAqxekvGD0
wizpic:
https://www.youtube.com/watch?v=-oHDuEncQZA[/url]
Re: pic16f876 voltmeter
1. Very stable
2. for amps calculation you use
"amps_read = (float)(amps * 3)/1023;"
or
"amps_read = (float)(amps * 51)/1023;"
I have 0.1 ohm resitor in series with ground and I measure voltage dropout and write to lcd as amps. Max amps output is 3A. but if I put...
Re: pic16f876 voltmeter
Made another pcb and readings (without load) is good , but when I connect the load stability problems appear
Next thing is to modify the code for multiple reading and make average for displaying.
That's correct ?
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