The new version of the solar collector controller

There a new simple solar controller version. Changes: added 5 button keyboard, added connection for network module, added LCD backlight on / off. zir3
More knowledge will be presented later.

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DIY boiler heat exchanger test

Boiler heat exchanger made ​​of 5 m 1/2 “section of corrugated stainless steel pipe. Between the inlet and outlet coolant at around 4 degrees difference.

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Manufactured controller printed circuit board (PCB)

Already made ​​a controller printed circuit board (PCB):

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