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Anonymous users2024-01-24You don't need to use a single-chip microcomputer, the single-chip microcomputer is too romantic, and you can use a general circuit.
Use a ceiling-type ducted ventilation fan. We cannot use regular sash windows or wall sashes.
The main thing is to turn off the exhaust fan at the same time after turning off the lights, if the odor is heavy, it is not conducive to ventilation and dilution. If it is not turned off for a long time, while consuming electricity, the life of both of them is also reduced, and maintenance is more troublesome.
If you want to open, how do you want to open, do you want 3 control or 2 control, 3 control, at least 4 lines, 1 neutral line, 3 control lines.
Buy a double-open single-control switch to control the lights and exhaust fans. >>>More
Fan, black with blue wire. The red capacitor of the fan is connected, and then the yellow wire is connected, and the other capacitor does not need to be moved.