this is my first technical post, so my apologies if this is in the wrong place.
I've got a load of free time at the moment, and would like to put it towards a project. I thought a solar flare detector would be pretty cool.
It works by having a resonant loop which is matched to one HF radio station (I have several candidates across Europe, but no definites just yet). When the charged particles from a CME (Coronal Mass Ejection) hit the atmosphere, they ionise some the gases in the ionosphere, which affects how well radio waves propagate. If I were to match my loop to one of these HF stations and monitor the received power, I would notice clear peaks when the ionosphere was more ionised, indicating a CME.
My plan is to have the loop connected to a matching unit, with an ADC converting the voltage across the loop to an 8 bit value.
Initially, I was going to use I2C to transfer the voltage to the GPIO pins of my raspberry pi, which would parse the data to Google Docs, and then update a graph on a website.
However, I believe I2C is not suitable for the 15 meter distance between pi and loop.
So I came across R422, which may be better. However, I have never used this before. I believe I would need a uC (hopefully MSP430) to send the 8 bit value to a R422 driver, which could connect directly to the GPIO of the pi.
The problem is I cannot figure out how to connect the uC to the R422 driver, both physically and through code.
Could anyone possibly help me figure this one out, or knows of any resources which might be of use? I have tried Googling, and reading datasheets, but alas, to no avail.
I have attached a simple flowchart of how I think the system should work. It's all one way comm, just to keep things (relatively) simple.
Many thanks for all your time,