XL4015-LED fine voltage adjustment buck module

The existing dcdc step-down module has problems such as the potentiometer used is inconvenient to adjust at any time, the adjustment speed is too fast, and the accuracy is low. This design uses two potentiometers, similar to the functions of the coarse focus knob and the fine focus knob, for LED , the fan's starting voltage to maximum brightness voltage variation range is relatively small compared to its own operating voltage. The device provides a convenient brightness adjustment module.
This design uses xl4015 as the dcdc device. The hand-tightened potentiometer uses 20kΩ and the slotted screw potentiometer uses 50kΩ. For 12vLED, it is recommended to tighten it to 30kΩ, or set the hand-tightened potentiometer to 0 (when the switch is turned on) and adjust the slotted screw potentiometer to The position where the LED just doesn't light up.
The input and output interface vias are made large, suitable for thicker wires to be soldered from the middle.
The hand-tightened potentiometer has a switch function and needs to be unscrewed to power up the circuit.
My ability is limited, if you have any questions please leave a message to discuss.