Need some help designing and building LED light strips for an interactive table
March 3, 2007 8:31 PM Subscribe
Need some help designing and building LED light strips for an interactive table -- help me select 880nm IR LEDs, understand the circuitry, and figure out how to deal with power.
posted by warhol to technology (23 answers total) 6 users marked this as a favorite
As part of the table we need to build a couple of LED light strips making use of high output 880nm IR LEDs (yes, it's an FTIR table). One strip is 4' long, the other is 3' long and the LEDs are probably going to be 1" on center. Ideally, I'd like to power the strip from regular wall current.
So, the questions:
- Are there LED strips that I can readily adapt to this task?
- I love / hate digikey. For a novice, there's too much information. Can you help me find what I mean when I say "high output 880nm IR LED"? (I'm just thinking little bulb shaped guy with the 2 leads sticking out the bottom...)
- What do I need to do resistor-wise? The LEDs are going to be in series... Should I just be doing 1 stronger resistor at the end of the series or little ones in-between?
- How do I deal with the power? Is there a power brick that'll get me down into the range that I need or is will it end up being something custom?