• PWM control of the LED

  • Melissa2062

Please tell me what this is and how it works. I need to dim a red LED in a lamp. Everyone talks about PWM control. I know that LEDs require a driver, and there are drivers with PWM dimming. What is it based on, and what do I need to buy to make it work? Sorry for the amateur questions, but I'm not very knowledgeable about this.

Diana3118

The LED is controlled by the current; the higher the current, the brighter it is. The driver (power supply for the diode) usually outputs a constant current, but there are PWM-controlled drivers, meaning there is a PWM input on the driver, and according to the signal on this input, the current output by the driver changes, thus affecting the brightness of the diode.

Karen2578

The PWM driver will also need a controller to manage it... (sending those very signals). It doesn't seem very rational to me to adjust the brightness of just one red channel. For a budget option, you can look for a driver with "standalone" manual dimming (an additional controller won't be needed for it).

Vanessa6144

Will any of these drivers work? LDD-700H driver for 13 LEDs with PWM current control at a frequency of 100-1 KHz LDD-700L driver with PWM current control at a frequency of 100-1 KHz LDD-1000H driver for 13 LEDs with PWM current control at a frequency of 100-1 KHz LDD-500H driver for 13 LEDs with PWM current control at a frequency of 100-1 KHz

Scott8536

A controller is needed for all the listed drivers, although it can also be done manually.

Daniel132

Here is one, I used such before installing the controller.

Richard

Here is a manual knob for LDD drivers. By the way, I tried it - it works.