Can anyone recommend me which Hardware I require to develop a small project to measure Energy saved.
I have a system which currently switches off AC and lighting circuits for rental homes when the client is out of the premisses using a simple keyfob Timer and Relay circuit. I would like to develop a monitoring sytstems to show me energy saved using loop sensors which show me current flow at the mains.---
I need to Measure 2 analogue sources of Current using a small loop sensor which give me a small voltage change. Then I need to record the values and compare them to values obtained prior to them removing the keyfob which genertates another signal to tell me to start counting time and multiplying that by time elapsed and the energy used thus giving me the amount of KWH saved between Client out and Client In.
I want to store the results to show me how much energy has been saved since the last reset say and display this on a LCD which could also show me lapsed energy saved until the key is returned on the keyfob.
I have looked at the Arduino Uno option with Makershield but there are other options which seems more attractive given that I will want a more permanent solution once developped.
1) Ardweeny + Protoshield 2) Prototino 3) Boardwino
I Have yet to purchase any of these but would like guidance as to which combination I should use to develop then build my boards--- given that I might want to make about 20 of these to hand out to my clients. The Programming side looks fairly comprehensible as I was a C programmer.