Three-wire forward and reverse LED light string control circuit and 6-way LED light string

A three-wire forward and reverse LED light string control circuit, comprising an external power supply, a microcontroller unit (MCU), a driving circuit and an LED light group circuit,

• wherein the external power supply supplies power to the MCU and the driving circuit, the driving circuit comprises a P-channel first field effect transistor (FET), an N-channel second FET, a P-channel third FET, an N-channel fourth FET, a P-channel fifth FET, an N-channel sixth FET and a P-channel seventh FET;
• the second FET, the fourth FET and the sixth FET each has a gate connected to a first output end of the MCU, a second output end of the MCU and a third output end of the MCU respectively, the second FET, the fourth FET and the sixth FET each has a grounded source, the second FET has a drain connected to a drain of the third FET, the fourth FET has a drain connected to a drain of the fifth FET, and the sixth FET has a drain connected to a drain of the seventh FET;
• the third FET, the fifth FET and the seventh FET each has a source connected to a drain of the first FET simultaneously, the third FET, the fifth FET and the seventh FET each has a gate connected to a fourth output end of the MCU, a fifth output end of the MCU and a sixth output end of the MCU respectively;
• the first FET has a gate connected to a PWM (Pulse Width Modulation) control signal output end of the MCU, and the first FET has a source connected to the positive electrode of the external power supply.