The USB LED / Fan Driver module can drive a mini USB LED (power up to 5W) and USB fan (power up to 2.5W). The brightness and the speed can be adjusted via PWM whose frequency should be less than 20kHz. It is compatible with Arduino / AVR / ARM / PIC. In the package the USB LED module whose light color is white rated at 0.35W and can be used as night light. It can be placed in the wallet or hang on the key chain so that it is easy to carry. Module features are as follows: 1. SCM system can enable the USB LED dimming 2. Power supply for DC4.5 ~ 5.5V 3. Interface logic level can be 3.3V / 5V 4. Standard electronic bricks interfaces easy to use Work With Touch Sensor Switch Module : Work With ​Touch Sensor Switch (Toggle Mode):