Controller Circuit Diagram:
fig. 1 Click image for higher resolution.
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Two methods are available for connecting the controller board to the output relay - an on-board relay ( fig. 2 ) or an external relay ( fig. 3 ) .
The second method is suitable when the distance between the controller and the apliance is very long,but this way requires a
local power supply.The DS18B20 is always powered by the 1-Wire data line (" parasite power ").
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| On-board relay - pins 4 & 5 closed: | External relay - pins 4 & 5 opened: |
fig. 2 |
fig. 3 |
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