Single button color-adjustable and dimmable led lighting device

A single button color-adjustable and dimmable LED lighting device, comprising:

• a control board having a microcontroller unit (MCU) control circuit, wherein the MCU control circuit has a variable resistor and a switch;
• a button knob assembly disposed on the control board and electrically connected to the MCU control circuit;
• and
• a light-emitting module having a first pulse-width modulation (PWM) control constant current circuit, a second PWM control constant current circuit, a first light-emitting diode (LED), and a second LED, wherein the first PWM control constant current circuit is electrically connected to the MCU control circuit and the first LED, the second PWM control constant current circuit is electrically connected to the MCU control circuit and the second LED, a color temperature of the first LED is different from a color temperature of the second LED, and the MCU control circuit is configured to generate two corresponding PWM signals based on a resistance value of the variable resistor and a state of the switch to respectively control an output current for the first LED and an output current for the second LED, such that the light-emitting module emits light with different brightness or different color temperatures.