What's new

Search results

  1. Kevin P

    Electronics Gurus: How do i lower DC voltage?

    Are you building this LED display yourself, out of discrete LEDs? Ideally, use one resistor per LED, and go by the LED's actual current rating (I used 20 mA as an example). Stay below the MAXIMUM rating though. Note that different color LEDs may have different voltage/current requirements, or...
  2. Kevin P

    Electronics Gurus: How do i lower DC voltage?

    How much current does the LED unit you're trying to power draw? If it draws a fixed current (e.g. it's not a flashing LED) you can figure out the resistor value by using Ohm's Law: I = E / R (I = current in amps, E = voltage in volts, R = resistance in ohms). A single LED typically runs at...
Top