Control circuit and circuit of multi-speed ceiling fan with light

A control circuit, comprising:

• a unidirectional controllable circuit;
• a bidirectional controllable circuit;
• and
• a regulation circuit,
• wherein the unidirectional controllable circuit is connected to a mechanical switch and a load, the regulation circuit is connected to the unidirectional controllable circuit and the bidirectional controllable circuit, and the bidirectional controllable circuit is further connected to the mechanical switch and the load;
• the unidirectional controllable circuit is configured to transmit a negative half-wave voltage of an AC power source to the load;
• the bidirectional controllable circuit is configured to transmit a positive half-wave voltage and a negative half-wave voltage of the AC power source to the load;
• and
• the regulation circuit is configured to control at least one of the unidirectional controllable circuit and the bidirectional controllable circuit to disconnect, so as to realize different gear control of the load by regulating the waveform of the AC power source.