I bought a 0.5-4.5 volt ratiometric pressure transducer so I could both supply power to it with the arduino as well as read it w/ an analog. Question is: Do I need any resistors or caps between the transducer and the arduino? I'm real brand new to transducers, so I apologize if this is a stupid question.
Probably not, but you'd need to tell us which transducer you've bought.
Should be a simple 3 wire hook-up to the Arduino, ground, +5vdc and analog signal. Would not hurt to wire a .1ufd bypass cap from +5vdc to ground right at the transducer connections.
Lefty
Ok, I've seen that in a few circuits I've looked at for ideas. What does the bypass cap actually do? And also, I've looked quite a bit on the net about how to size resistors and caps, and when they're needed, and haven't found anything that clicks just yet. Thank yall for the help.
It strongly depends on the sensor.
I've used a low-cost, miniature one with such low sensitivity that it took some analogue electronics to amplify it to a useful level. (Being miniature was critical)
What sensor is it? Can you point us at a datasheet.
Here's the specs on it.
It's a 0.5-4.5 VDC ratiometric, 3 wire
Thanks
What does the bypass cap actually do?
It provides a low-impedance path to ground for noise on the supply line - all digital circuitry generates loads of switching noise which if not filtered out will interfere with the analog circuitry.