Timeline for powering 900 led's
Current License: CC BY-SA 3.0
11 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Dec 23, 2015 at 15:35 | history | tweeted | twitter.com/StackElectronix/status/679686662650200064 | ||
| Dec 23, 2015 at 6:38 | comment | added | user57037 | OK. I watched the video. So he said it was around 100 W of electrical power. I guess that is plausible. | |
| Dec 23, 2015 at 6:32 | comment | added | user57037 | @rdtsc, but 36 A * 3 V = 108W. So that is far from 1 kW. | |
| Dec 23, 2015 at 3:34 | comment | added | rdtsc | The LED is specified as a "3528" type, which turns up a plethora of datasheets such as this one and this. Without a valid datasheet, it is impossible to determine your maximum current and thus, maximum brightness. But both of these show around 40mA (0.040A) per LED, which sounds reasonable to me, and would produce the kind of brightness shown in the video. 40mA x 900 pcs = 36A. | |
| Dec 23, 2015 at 3:21 | answer | added | Reid | timeline score: 1 | |
| Dec 23, 2015 at 1:45 | comment | added | MarkU | Also, don't overlook the need for heat sinks -- automotive LED assemblies are normally built on a large block of aluminum, to dissipate the excess heat (Vf x If) and avoid shortening the product lifetime. For a small LED project this is often overlooked, but at 900 LEDs (and a kiloWatt of power?) this could be a significant factor. | |
| Dec 23, 2015 at 0:47 | comment | added | alphasierra | Buying power supplies for higher power levels is always expensive for the most part. You need to decide how you're configuring the LEDs (series/parallel sets) in order to determine the required voltage and current to drive the LEDs. RC batteries are actually a pretty good way to go. They're not super expensive and can supply a pretty decent amount of current. Chargers for them are also relatively inexpensive. | |
| Dec 23, 2015 at 0:40 | comment | added | David | You should research and outline how much power you need and at what voltage. This will narrow down your options. | |
| Dec 23, 2015 at 0:39 | comment | added | David | I watched a minute of that video. I'm not sure when a kilowatt became a measurement of light output. | |
| Dec 23, 2015 at 0:34 | review | First posts | |||
| Dec 23, 2015 at 6:17 | |||||
| Dec 23, 2015 at 0:33 | history | asked | rohaa8673 | CC BY-SA 3.0 |