LED gradually turning on and off circuit module light soft start gradient light controller PWM buffer switch D49 Soft start buffer switch circuit, finished product with casing. PWM pulse width modulation gradient process. After the yellow line is connected to the positive pole of the power supply, the output duty cycle slowly increases to 100%, and after disconnection, the output duty cycle slowly decreases to 0%. The default gradually brightening process is 3 seconds, and other customizable options for other times (integer selection within the range of 2-20 seconds) need to be customized. The time value required for messages is measured in seconds (with decimals included). Precautions: 1. Normally suitable for non constant current lighting control. Due to the PWM modulation method, high-power LEDs with additional circuits (such as constant current drive) are not suitable; 2. Before turning on the power, please check whether the positive and negative terminal connections at the input end are correct. If they are reversed, it will (including but not limited to) be equivalent to a short circuit and burn out. 3. Please use with caution when using for motor loads. The applicable current (maximum locked rotor current) is very small and cannot exceed 1A!!! Parameter Description: 1. MOS transistor output, working below 3A for a long time, with a DC12V voltage of about 35W for ordinary SMD light strips; 2. Applicable voltage: DC5-24V (output voltage peak is approximately equal to input voltage); 3. Product shell size: 43 * 22 * 11 (excluding protective wire sleeves on both sides); 4. The extension length of the lead wire is about 12CM (the input end is slightly shorter); 5. The gradual process of starting and turning off is about 3 seconds each; 6. After being completely extinguished, the shutdown state is in low power consumption mode,