elektor gprs
Controlling Equipment Remotely
I'm asking for your help.
I will first explain what I want to do and why, and what I have come up with so far.
I live in Australia on a small Properity, there is no mains power supply.
Power is supplied by generator and solar system. What I want to do, is control equipment remotely over a large area Pumps on Dams (petrol driven electric start), Generator (240vac electric start), Lighting (low voltage solar powered) ETC.
I am not able to control this equipment with low voltage control circuits, due to voltage drop, especially over a one kilometre distance.
What I have come up with, is running telephone cable to these remote pieces of equipment (which are solar powered) controlling them using switching TONES back and forward down a pair of telephone cables.
I have attached a circuit using discreet conponents that I have started working on, but I,m sure there is many better ways of doing it with out a huge cost, and still have a wide band of tones for switching many oieces of equipment in each direction.
EG Pump Start
Pump running
Tank Full
Pump Stop
Fuel Level Low
thisthat