I am designing a Raspberry Pi hat that needs to be able to accept inputs from 3 different water meters. Two of the inputs are 4-20mA signals, the third input being a pulse signal. At the top I have two powered 4-20mA loops powered by 24VDC. These loops are connected to a 16 bit ADC (A0/A1) which is connected to the Raspberry Pi through the I2C communication ports. There are 200ohm resistors for each of the loops. Both 4-20mA output modules have a positive and negative wire as well as a ground wired to the water meter.
1.) Will a 24VDC power supply be enough to power both 4-20mA loops?
2.) Is 200 ohms for the resistors still sufficient?
On the bottom right, I have the pulse signal terminal. I have measured the pulse signal to be 24VDC. Because this is a pulse, I need to debounce it which I think I can do using a hardware debounce with a capacitor. The Pulse is then connected to pin 23 on the Raspberry Pi.
3.) Will this design of the hardware debounce even work? What problems are present in its design?
4.) How do I figure out what size capacitor I will need?
5.) Overall is the design sufficient for what I need?
I don't know much about electronics, so any help would be much appreciated.