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@@ -12,12 +12,12 @@ If your heater uses one of the following style controllers, this design **will**
+
The all important part though is the control PCB within the heater.
This is the PCB within a blue wire enabled heater that will 100% work with this controller design.
The blue wire interface is circled in the following photo:
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The important selection criteria is whether a dual transistor multiplexer is evident on the input path of the blue wire, this sort of topology **must** exist, if the wire runs direct to the microprocessor, it is most likely incompatible, and probably an analogue voltage from a pot:
