if have arduino due, then want to use analog pin as input but my input if directly reading data may be cannot because
have voltage over 3.3 V exampleanalog A0 assign reading 24V AC peak to peak
Analog A1 assign reading 25V DC
Analog A2 assign reading 5V triangle Peak to peak
Analog A5 assign reading 5A AC currentmy question is how to decrease this reading it could be can connection to due analog pin..any circuit can reduce this voltage or current..
need advise...
What is the Vcc for the DUE (3.3 OR 5V ?)
Probably 10k ohm resistor to the input, 2k resistor to GND, and where the two resistors connect in the middle is the output to the
arduino analog input. If necessary increase the 10k or reduce the 2k resistor to bring the analog input voltage down more. Use the
ratio of the two resistors 2/10 as a reference. Multiply the value obtained by analogRead by the recipricol of the voltage divider ratio to convert to the real voltage value.
24V in to the above voltage divider will give 4V out to the arduino . If that is still too high then change the 2k to 1.5k and then
24V in will give 3.1 volts out to the arduino. 3.1V x[ (10k+1.5k)/1.5k] = 24V (conversion to obtain actual voltage measured BEFORE the voltage divider)