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 ...

Similarly, one BS170 mosfet was used in my prototype to drive the 3 x White LEDs strip. This part number (and ofcourse the LED type) is not very critical. If you want to use a bi-polar transistor, don ...

One such IoT devotee is [Sasa Karanovic], who writes in to tell us about his very impressive custom IoT LED dimmer based on the ... files for his PCB to the Arduino code he’s running on the ...