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mikesmixes
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I need to build a simple circuit that can connect to the A/D of a PIC. the circuit must be able to accept both 4-20mA and 1-5V. I was thinking of some sort of op-amp circuit. Any ideas?? Thanks
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mikesmixes said:The protection is another thing, like you say, what if 10V in applied??
This device is going to be enclosed so the input circuit needs to be fixed, ie we cant use a jumper.
Is there no op-amp circuit that could be used for this aswell as protecting from overvoltage?
mikesmixes said:I need to build a simple circuit that can connect to the A/D of a PIC. the circuit must be able to accept both 4-20mA and 1-5V. I was thinking of some sort of op-amp circuit. Any ideas?? Thanks
YES thats my question ( How to read the ADC input ) and as i discussed this somewhere in this forum, it is just a panel meter wich will recive 4 to 20 ma ( Or 1 to 5v using 250hm: ) and read the output as percentage from 0 to 100 % on an LCD or two 7-segments LED. and i am using 16F876.ericgibbs said:hi,
Are you asking how to read the PIC's ADC input and display the result on a
LCD/LED display, if so we need to know more about the application.
Which PIC are you using, which assembler, what are the are the ADC input voltages etc...... whats the project?
ericgibbs said:hi,
Have you looked thru these tutorials of Nigel's
They are a good start off point.
aljamri said:Hi,
yes i've printed out most of them but read some of them, so which one answers my requests?
thanks