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PointOnePA
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Recent content by PointOnePA
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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...
PointOnePA
Post #14
Aug 19, 2023
Forum:
Batteries & Power Supply Design
P
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...
PointOnePA
Post #2
Aug 18, 2023
Forum:
Power Conversion
P
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...
PointOnePA
Post #2
Aug 18, 2023
Forum:
Batteries & Power Supply Design
P
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...
PointOnePA
Post #2
Aug 18, 2023
Forum:
Batteries & Power Supply Design
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