USB-Led-PWM In planning stage. Three leds connected via 2N3904 transistors to a ATTiny25. The PC software send values between 0-255, which sets the PWM values of the three outputs. A 0 means power off, 255 fully on. This way we can either have a PWM-regulated output or a on/off output, al regulated from the PC. 100418: Completed with a Tiny461 and a RGB-led, no transistors. The PC code sends three values between 0 and 255 to the device, which then changes the red, green or blue color accordingly. By sending the right values the Led can be lit in nearly any color. This device is powered from USB, no external powersource is used.