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Forum Index : Microcontroller and PC projects : Arduino Battery Voltage Controlled Relays
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| JackS Newbie  Joined: 04/03/2009 Location: New ZealandPosts: 8 |
Hi George65 That looks like it could be a solution but I would like to use this as an opportunity to learn about using a micro if I can, kicking & screaming  |
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Madness Guru  Joined: 08/10/2011 Location: AustraliaPosts: 2498 |
A 48V 1500W heater element is only $32 AUD from here. However if you are going to use this for heater your household hot water you will get to a point where the heater will need to turn off to stop the water boiling. Or add a temperature controlled valve that releases hot water from the system to control the temperature. It would be quite easy to setup the controller so there is a PWM signal to MOSFETs to keep your battery voltage at the set point. Solar though does not need to be loaded down so the controller I have designed will handle that as it is now. I need to add code to it to turn on loads as excess power is available. In my case I am also going to control an air conditioner based on temperature and battery voltage to keep my equipment =< 24 degrees. I plan to be using a pelton wheel in the future, this will be from a large dam with only a very small trickle of water into it normally. So I will make nozzels that will be adjusted electronically to produce as much power as required. When I have excess solar power I will pump water up the 80 metre head to replentish the dam. I think I should have around 3 weeks supply of power from a full dam. You won't regret learning how to code a micro controller, it gives you so much flexibilty and control. There are only 10 types of people in the world: those who understand binary, and those who don't. |
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| JackS Newbie Joined: 04/03/2009 Location: New ZealandPosts: 8 |
My pelton wheel is very low head about 34 Ft but largish flow I get 240 watts with a 1 inch jet most of the time so I have no problem with dumping water from hot system to prevent overheating We did have a heat wave this summer with temperatures sometimes going over 30 degrees |
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| Madness Guru Joined: 08/10/2011 Location: AustraliaPosts: 2498 |
That is about 6.5 litres per second, I am aiming for 1 litre per second with a 6mm nozzle. There are only 10 types of people in the world: those who understand binary, and those who don't. |
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