How to make a super bright LED light panel (for video work etc)
Why Electrical Engineering Stack Exchange recommends it
Electronics Stack Exchange askers cite it as the source of their LED panel designs, especially when they want to understand its potentiometer and resistor values for adjusting a voltage regulator.
Recommended by 1 people across 1 different months, 2015 to 2020.
What it is
A DIY Perks build video showing how to make a 900-LED daylight-balanced light panel, roughly equal to a 1000W incandescent bulb, for video work. It covers the MDF frame, LED strips, a step-down voltage regulator with an external dimming potentiometer, and a battery power setup.
What people said
Recommends Firedan1176 · 2020-08 · Electrical Engineering Stack Exchange · on “Setting minimum output voltage of boost converter with potentiometer and resistor”
I am designing an LED light project using this Cree XLamp LED [LINK] , (Forward voltage is 36V, forward current is 2400mA) and I am looking for a way to limit the output voltage of a boost converter by adding a potentiometer and a resistor. For reference, this was demonstrated in this video [this video] . However what I don't quite understand is how he chose to select a 6.8k ohm resistor to run in series with the added potentiometer. What I believe is confusing me is the basic usage of Ohm's law. By my understanding, when the potentiometer is fully at the left and there is no resistance (through the pot), the total resistance is 6.8k. The output voltage of the boost converter is 6V. When fully at
Cites rohaa8673 · 2015-12 · Electrical Engineering Stack Exchange · on “powering 900 led's”
I am hoping to make an LED panel for video recording. This [this video] is the video I am building based on. I am relatively a novice when it comes to electrical work, but I am competent. This project will use 900 LED's. The LED's in question can be found here. [LINK] In the video, the guy makes a battery pack using a lithium-ion polymer battery pack from an rc car. This seems kind of expensive. If I were to buy 3 packs of those LED's (900 individual), what would I be looking at for a power supply that would be portable? I was hoping for some sort of power bank?
Cites reddragon105 · 2020-10 · Electrical Engineering Stack Exchange · on “Can someone please explain how to add an external potentiometer to a voltage regulator with a trim pot?”
I'm building an LED light panel and I'm setting up the electronics according to this video [this video] . As you can see, he uses a 22K potentiometer and a 6.8K resistor. I would like to understand why he uses those values. As in, why a 22K potentiometer and would any other value work? And why would a 6.8K resistor result in a minimum voltage of 5V? And how do the two potentiometers work together?