144 LEDs total. Three sets of 48 in series connected in parallel. My problem is I don't know what value to use for R1. I'm thinking 600 ohm, but I really don't know how to calculate this. I'm making ...

Ok, i have 8 3.6v (20mA) LEDs on a single 12v line with a 50 ohm resistor. My problem is that the amperage of all the LEDs exceeds 1W and my resistor is only a 1W. Could i make two sets of 50 ohm ...

One of the questions that hobbyists ask over and over is how to select the value of a current limiting resistor for an LED. Usually the seat of the pants response is: “Subtract 2 V from the supply ...

Linear constantcurrent drivers, for instance, offer low EMI, low cost, and use only a few components. Many designers favor them for low-current applications where power loss is a minor concern. If ...