Alternating current control system

An alternating current control system, which is adapted to an alternating current power source, the alternating current control system comprising:

• a zero crossing detector including an alternating current signal processing circuit and an optocoupler, wherein the alternating current signal processing circuit is electrically connected to the alternating current power source, and the optocoupler is electrically connected to the alternating current signal processing circuit and outputs a zero crossing detection signal;
• a microcontroller including a first control pin, a second control pin, and a third control pin, wherein the first control pin is electrically connected to the optocoupler for receiving the zero crossing detection signal, the second control pin receives a switch state signal, and the third control pin outputs a control signal;
• a constant current driver electrically connected to the third control pin for receiving the control signal;
• and
• an alternating current solid state relay electrically connected between the constant current driver and the alternating current power source;
• wherein, based on the switch state signal and the zero crossing detection signal, the microcontroller adjusts a level of the control signal and controls an electrical connection between the alternating current power source and the alternating current solid state relay.