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in some casses ypu right when you just need a simple voltmeter chip with out auto decimal point shift but when you are making some thing special then controller provide a good solution
in some casses ypu right when you just need a simple voltmeter chip with out auto decimal point shift but when you are making some thing special then controller provide a good solution
I agree with mhdmax and you, not with wizpic.
ICL7107 is not outdated, but is simple solution for simple and instant applications.
Beside, there is complicated solution with PIC, but for the complicated demands, not for the simple ones. In fact I have been using both solutions depending on cases.
Yes it is a good chip and yes you can still get it, But I found they where unstable not giving accurate reading's. I brought the double Panel meter from velleman abd tried very thing to get a good stable reading.
so I made a double pannel meter with one PIC and 8 x 7 segments reading up 99.99volts with +/-5mV if you wanted that high
I also said it was a good document and to me it is an old design. and only asked a the question why not use a PIC at no point did i say don't use it
ICL7107 is Still a nice chip for panel meters. Accuracy depends on how accurate components in the circuit you are using. Good and stable resistors capacitors with tight tolerence and multiturn pot in place of single turn pot for caliberation can give you an advantage.
And even this chip can be used to make auto ranging voltmeter/ammeter, but this will be a little more complex(in this particular case a will go for using MCU)
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