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LED strips aren't created equal. We explore a major difference which could rob you of half the light output and make your installation less reliable.
The problem is caused by two issues - voltage drop with distance along the LED tape and how the current is controlled within the LED chains.
The cheap LED tape has lightweight copper tracks which cause a voltage drop, so LEDs further down the LED strip don't receive the same amount of voltage as the ones at the start.
Combine voltage drop with the simple current regulation of the LEDs using resistors and you'll see how the light between the start of the LED strip and the end is vastly different.
Premium LED strip, such as the Osram LEDflex we use in our videos, has more copper in the PCB tracks and uses linear constant current regulators to ensure a constant current flow in the LED chains.
Quite a technical video, but essential viewing for anyone designing and installing LED strip.
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00:00 Cheap LED strip
00:40 Constant voltage and current regulated LED tape
01:20 Measuring the light output of low cost LED strip
02:20 What happens when voltage input drops.
03:35 Light out at the end of a low cost LED strip
04:15 Circuit configuration of low cost LED strip
05:30 The problem!
06:15 Current regulated LED strip
07:10 Measuring the light output of current regulated LED strip
09:00 Circuit configuration of current regulated LED strip
09:45 Comparing voltage drop of cheap LED tape with Osram LED flex
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== AD ======================================
Make soldering easy with this SolderM8 jig
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LED tape, drivers and connectors used in this series has been supplied by Osram.
Available in the UK from Penn Elcom
www.penn-elcom.com/default.as...
and RS Components
www.anrdoezrs.net/links/92936...
Benchtop power supply similar to the one used in this video
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Presented by.
Gary Hayers - technical editor eFIXX
Gordon Routledge - technology editor eFIXX
#efixx #lighting #ledstrip