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  1. P

    Power Supply for LEDs

    Meanwell LDDS-250HW is a constant current (250mA) DC-DC step down controller that would work if you forced dimming to be on to limit the current to 200mA. It will dim with a resistor (0-10V). I'm using the LDDS-1000HW to drive a 24V COB LED strip light with a 48Vdc input, but it'll work for...
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    Question on DC switching frequency and LED luminaires

    In which Philips' document did you see the DC switching frequency? From prior reading, my thought is that PWM LED drivers are sometimes used to increase the intensity of the light. A large, but short pulse of current results in a more intense light while keeping the average power about the...
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    Help with multiple cracked Lead Acid UPS Batteries

    My experience is with the manufacturer of battery powered semi-truck air conditioners (AC). The AC used100 AmpHr Interstate or Northstar VRLA 12V batteries. In 3 years of production I never saw cracks like this due to pallet shipping, truck vibration, or charge/discharge, even after 4 years of...
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    Im a total novice and I need help with simple solar project.

    I can tell you want I've learned from using DC powered, COB LED Strip lights (Amazon.com) in my basement. I'm using a 48Vdc main backbone with 24V LED strips and some Meanwell constant current controllers. The key problem I had was identifying the layouts (serial/parallel) used in LED strips...
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