Dimming Led Lights With Resistors

Passive resistance 1 10vdc 0 10v and pulse width modulation pwm.

Dimming led lights with resistors.

Hi i am trying to rig up a single led for an aircraft 24 volt system breakout box. I need to have a led light that will withstand higher current applications. Let s also say that we want the led current to go down to 1 ma. Though adding an incandescent bulb to the circuit and using a load resistor are both ok led dimming solutions they are only short term fixes and don t get to the heart of the matter incongruous pairing.

There are two solutions to consider. Long term solutions for dimming leds with no flickering. It will be tested between 2 banana plug sockets. Typical dimmers reduce the rms voltage heading to a light to dim it.

This 3 in 1 dimming allows for the user to dim leds with three different forms of signal. With a pot we also want a 150 ohm fixed resistor in series. Dimming an led light is as easy as adding resistors to the connection or even several resistors to ensure you get the right brightness this is called analog dimming. Many models like the hlg npf and lpf are built with mean well s 3 in 1 dimming feature.

In recent years advancement in led technology has made dimming possible and even easy but it will still require a little planning. So by putting the 150 ohm resistor in there there will be a maximum current of 20 ma through the led. Early led fixtures were not receptive to dimming. Dimming 110vac led fixtures.

Deal with a wide range of source voltage including part formed sine waves which is not easy for the control logic. Mean well has developed a wide line of led drivers with advanced dimming features for led lighting. In many states there are regulations to the brightness and colors of leds on cars which is why this is important to take note of. The reason for this is that the pot will go down to 0 ohms and we don t want to blow anything up in that case.

This can be done by simple resistors or by chopping the top part of the waveform. Many led fixtures are available in low voltage 12vdc or 24vdc input or standard 110vac input. And it needs to stay small like for on top of a mini banana plug grounding plug.