Synchronous control system of light bulbs and synchronously controlled light bulbs

A synchronously controlled light bulb comprising a synchronous control system, wherein the synchronously controlled light bulb is controlled by the synchronous control system and the synchronous control system comprises:

• a rectifier unit connected to a live line and a neutral line of an external power supply, wherein the rectifier unit is configured to convert an alternating current into a direct current;
• a synchronization signal and control signal sampling unit connected to the rectifier unit or the external power supply, wherein the synchronization signal and control signal sampling unit is configured to count a number of periodic changes and a number of periods of the alternating current or a control signal pulse to provide a synchronization signal and acquire a control signal input by an external controller connected to the external power supply;
• a control unit connected to the synchronization signal and control signal sampling unit, wherein the control unit is configured to receive the synchronization signal and control the synchronization signal and/or control signal output by the synchronization signal and control signal sampling unit;
• an MCU power supply unit respectively connected to the rectifier unit and the control unit, wherein the MCU power supply unit is configured to supply power to the control unit;
• an LED assembly including one or more LED units, wherein the LED assembly is respectively connected to the rectifier unit and the control unit, and the LED assembly is controlled by the control unit;
• a fuse and a current-limiting resistor are respectively connected to the live line and the neutral line between the external power supply and the rectifier unit;
• the rectifier unit is a rectifier bridge, and a first pin and a third pin of the rectifier bridge are respectively connected to the live line and the neutral line of the external power supply;
• two ends of the fuse are connected to a line connecting the first pin of the rectifier bridge and the external power supply;
• two ends of the current-limiting resistor R1 are connected to a line connecting the third pin of the rectifier bridge and the external power supply;
• and
• a fourth pin of the rectifier bridge is grounded, and a second pin of the rectifier bridge is respectively connected to the MCU power supply unit, the synchronization signal and control signal sampling unit, and the LED assembly, wherein a line connecting the second pin of the rectifier bridge and the LED assembly is sequentially provided with a diode and a fourth resistor;
• an anode of the diode is connected to the second pin of the rectifier bridge, a cathode of the diode is connected to a first end of the fourth resistor, and a second end of the fourth resistor is connected to the LED assembly;
• and the MCU power supply unit is connected to a line connecting the diode and the fourth resistor.