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DIY solar hot water controller


the solar hot water system you can see on this blog has cost approximately £200 all in. In particular the flat plate collector was made out of mostly recycled materials! Here in the UK people regularly pay anywhere in the region of £6000 - £8000 for a system which we regard as inferior. And what's more it has a horrific amout of embodied carbon due to shipping from China. So have a go yourself and we hope this blog will assist you in your system design and construction..
below you'll find the blog area which we're updating constantly with new info regarding the controller...coming soon...a dedicated PCB!!!


display module with 4 button interface...

here’s a shot of the new 2×16 lcd display module.  Tony’s mounted it on a parallax propeller proto board so it’s got the microcontroller on the back…there’s also 4 buttons to have a play with.  now I need to program up some sort of 4 button interface to control setting variables in the code…

display_module

still doesn’t look much like a DSHW controller but when the code’s sorted and it’s mounted on it’s own bespoke pcb it should hold it’s own against any delta T controller out there…and it will have our secret weapon….the ‘bath button’.  All the spin code for the microcontroller as it is will be posted on the blog so if you want to reprogram or tinker with the code you’re welcome to do so.

check out parallax

and of course spinvent

to gen up on the propeller.

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