Hello, I am working on an energy meter project that uses ADE 7753 as energy monitor IC and Arduino Uno as MCU. I am using a voltage transformer for voltage sensing and a current transformer for current sensing. My questions are
1. Which pin of ADE7753 do I connect the to the SlaveSelect pin of Arduino (Uno pin 10 or 9)? Is it cheap select pin CS bar (pin 17) or a different pin? please suggest.
2. I am using a 230/12 V AC step down transformer which actually gives 14.5V. So I reduced this voltage using a 33k+1k resistor divider which gives an output around 0.45V. As per datasheet the maximum voltage for analog inputs is +-5V. So I think it is safe, but what is the gain I should select. Is the gain selection automatic or I have to write on the GAIN register?
3. Is there any code for ADE 7753 with Arduino from any previous project that I can use as a sample? I am new to this and I need your help urgently. Thank you.