Questions?

electrical circuits in Columbia, MD

Hi there, I am doing a class project, and facing some issues and your help if you can help me to figure them out, I appreciate that in advance. I want to do a circuit diagram to power on two sensors that are using 5 VDC. The circuit will be used to make a direct measurement of Blood pressure and airflow and will serve as the gateway to the recording system (which I have no idea how it operates and I should consider it as simple oscilloscope). My goal is to use a voltage regulator and a unity gain amplifier as a buffer,However. I am confused on where to put the voltage regulator? The block diagram i am proposing is 1: 12 VDC battery-> 2: voltage regulator ( to maintain 5 VDC with three capacitors) ->3: opamp with unity gain ->4: connect to the oscilloscope. Is this correct? Also, my other question: since I am using two sensors, should I use two voltage regulators or only one? for sure I need to opamps to have two channels output. I appreciate your help in advance and looking forward to hear from you soon. Best Regards. A.

Sent by Awadh on 1/18/19