Patent ID: 8750696

Claim:
A dryer circuit comprising: a main circuit, comprising: a power unit, comprising: a first end for providing a first predetermined voltage; and a second end for providing a second predetermined voltage; a first heating unit, comprising: a first end; and a second end coupled to the second end of the power unit; a second heating unit, comprising: a first end coupled to the first end of the first heating unit; and a second end; a fan motor, comprising: a first end coupled to the first end of the first heating unit; and a second end; a diode coupled between the second end of the second heating unit and the second end of the fan motor; and a resistor coupled between the second of the first heating unit and the second end of the fan motor; and a connection controller comprising: a first electronic switch, comprising: a first end coupled to the first end of the first heating unit; a second end coupled to the first end of the power unit; and a control end; wherein the first end of the first electronic switch is coupled to the second end of the first electronic switch when the control end of the first electronic switch receives the first predetermined voltage; a second electronic switch, comprising: a first end coupled to the second end of the second heating unit; a second end coupled to the second end of the power unit; and a control end; wherein the first end of the second electronic switch is coupled to the second end of the second electronic switch when the control end of the second electronic switch receives the first predetermined voltage; and a switching device for coupling the control end of the first electronic switch to the first end of the power unit, or coupling both the control ends of the first and the second electronic switches to the first end of the power unit.