Obviously, when the switch is opened, dimmer #4 goes to zero, then dimmer #3 ramps down to zero, then #2, and finally #1 circuit. Help please.” I only had the Arduino UNO board and a couple of LEDs so ...

He sourced a 10W power LED which requires 12V @950mA ... sensor to his Arduino in order to shut it down if it gets too hot. The Arduino also provides the dimming circuit and remote control ...

This part number (and ofcourse the LED type) is not very critical. If you want to use a bi-polar transistor, don’t forget to add a resistor (~1KΩ ) between Arduino D10 and the base terminal of the ...