I want to install 24v led lights in my kitchen cabinets. I want the lights to turn off and on when I open and shut the cabinet doors and drawers. I need 35 or 40 switches, so I would prefer a lower cost switch. But I would prefer a proximity switch, if there was a small one. I would be ok with considering a limit switch or a plunger style switch.
What style switch would you use? The drawers could be any switch since I could hide it in the cabinet. But the doors I would prefer to keep a small diameter hole for the switch to stick through or if possible a proximity switch so maybe I could drill a blind hole so the switch would not be seen. I could french in a metal slug into the cabinet door if it was cheeper to use a maginet style proximity switch.
i would like to light a rectangluar box of about 18'' by 36'' inches to a level of 5 milliwats per square cm, using an led array if possible, can you suggest a lighting system from Newark to do this?
5W/ft should be enough for your.
Suggested this link:
SSP-LB12UW024K05 for cool white,
SSP-LB12NW024K05 for neutral white
SSP-LB12MW024K05 for warm white,
Hopes this can help you.
Your "maginet style proximity switch" is a good choice. Proximity switch is a kind of limit switch. You can refer to this link: http://en.wikipedia.org/wiki/Limit_switch
In general, the common switchs will be ok, it just the mechanism to do ON/OFF operation. However, you must be aware of your LED operating current/voltage, there is a component, called "current limiting resistor", if you want to build up your LED lighting circuit,
Your LED light may have it, but I suggest you to double check, just in case.
Here is the link for your reference.
I'm Ganesh from India, and i have few questions regards to LED.
- What is least cost of LED? I mean pricing starts from
- What is meant by Bin in LED? Elaborate clearly
- What are the main technical aspects required? While selecting a LED for design
- Define difference between Dominant and Peak wavelength
- Define viewing angle, Interms of viewing angle( Less viewing angle is good or Large viewing angle is good)
- What is meant my diffused and clear?
Hi, Ganesh Shetty
1. What is least cost of LED? I mean pricing starts from
Re: It's hard to tell you the least cost. It will depend on performance/ quality/ volume demand. You need to determined those factor, then define the cost range you requied.
2, What is meant by Bin in LED? Elaborate clearly
Re: BIN is the classification of LED after testing. While LED was made as completed products, LED testing will sort LEDs by Brightness/ Forward voltage/ Wavelength by constant current based on
LED datasheet ( in general, the If is 20mA).
Take an example, if LED's voltage range is 2.0-2.6V, Forward voltage will be devided as 3 BINs ( like sections), 2.0-2.0V, 2.2-2.4V, 2.4-2.6V.
If wave length could be devided as 2 BINs, and brightness as 4 BINs.
The total BINs will be 3*2*4 = 24BINs.
3. What are the main technical aspects required? While selecting a LED for design
Re: If pricing and leadtime is not the item we talk about, here is the aspects for me:
1. Your application will determine what kind of LED you need, fistly, the appearance of LED, like through hole LED/ Surface mount LED/ LED displays/ LED indicator/ light bar..
2. Color: That is wavelength. How many pcs you will use on your module? If you use more than 2 pcs of LEDs on your PCB and side by side, BINNING will be important.
3. Intensity: that is brightness.
4. Voltage and Current.
4. Define difference between Dominant and Peak wavelength
Re: Dominant wavelength is the color which human eye sensed and corresponded to the single wavelength in CIE color coordinate space.
Peak wavelength is the wavelength which are measured under the maximum intensity.
You can said that Peak wavelength is the color machine sensed, and Dominant wavelength is the color human sensed.
5. Define viewing angle, Interms of viewing angle( Less viewing angle is good or Large viewing angle is good)
Re: LEDs are measured so that the line along half the viewing-angle from directly forward is half the brightness as at directly forward.
If used 2 LED ships with the same intensity to package 2 LED lamp, the brightness of lamp with less viewing angle will be brighter than large view angle.
6. What is meant my diffused and clear?
Re:Diffusd means the lens is fogged. Clear means the lens is transparent.
I want to know how to match LEDs with different viewing angles. For example, say that I have an LED with a viewing angle of 20 degrees. I want to approximately match this viewing angle to a group of 10-degree LEDs. Could I achieve a 20-degree viewing angle with four 10-degree LEDs (two rows of two)?
Would the brightness be roughly the same as the brightness of the 20-degree LED?
You have 2 ways to achieve your target:
1. To find another LED, you just use only one with the higher brightness and the viewing angle you specify.
2. If you still need 2x2 LED cluster. You will need someone to do "secondary optics" design for you, to achieve the viewing angle you specify.
You can search the keyword of "secondary optics" on websites.
Greatings from North Carolina, USA. I am building custom LED lamps using 3W RGB diodes and an RGB controller that is common on the market. It has a 44 key IR remote controller and a 4-pin RGB cable coming out of the contoller. The device is 12v rated at 72watts with 2A per channel for a total of 6A. I am testing it with 16 3W RGB bulbs and I have blocking diodes and 2.2ohm 150W wire round resistors.
THe problem is that I keep blowing the RGB contoller. Inside, at the wire junctions is a transitor that gets too hot and blows. I don't think the logic on the controller is very well planned as if I use a volt meter accross any of the channels, it blows the contoller. I thought it might me too much foward or reverse current going back to the controller to blow it. THe blocking diodes seemed to work, and the big resistor's seem to carry the load without getting too hot. THe contoller is designed for those strip LED lights, so perhaps I am missing something.
Would you have any suggestions as to making my circut stable? Am I missing something? Thank you so much for any help you can provide.
I have been introduced to super-luminous LED's. Is there a difference? Also, what colors offer healing, and in what areas?
Thanx! Now I'm looking for a good company to get a reasonably priced system
I am Tan(Chen) from Malaysia. I have about 30 plus unit of LED downlight lamps, with 4 Cree XPE led, rated power 8w, power factor >0.9, input voltage 100-240VAC that started to flicker non-stop. At first I suspected maybe the caps on it may have expired. I dismantled the lamp to visually inspect it. The caps does not seem to have any sign of bloating/corrossion or problems that I could pin it on.
So I am thinking maybe some smd might be malfunctioning. In which case, I will have to buy a completely new driver for it. So my question is if I want to repurpose the leds into a portable light unit with a 12V sealed lead acid battery, what kind of simple dc voltage regulation circuit should I built?
From the picture, I think the led is connected in a series. with forward voltage of 2-3V, connected in series of 4, coming up to 8-12V. Could I just connect the leds to the battery and be done?
Thanks and best regards,
i am doing my project on visible light communication.
so will use LED array to transmitt data making it on- off(switching)
how can i switch all the LED simultaniously???
as i have only 1 output from the circuit.is there any IC available which can do this???
i mean 1 input signal can make array on and off at higher rate???
How to convert lux ino irradiance?
How to convert lux into irradiance?
What is the differance between LED and LCD. Which is better in the long run. Which is the most exspensive ??
Mike in Zellwood
As far as i know the difference between LED and LCD is only the back light. Both having same LCD screen, but LCD has a florescent back light and LED has LED back light. so LED takes low power and it is long life.
Please correct me if I am wrong.
If your talking about displays then LED's are the best. They are both eseeintialy LCD but instead of using flourecent or non-led light sources like LCD, LED uses unsuprisingly LED's to provide a backlight. This way the picture quality is magnified and is generaly energy effecient as LED's draw less power than other electronic light sources.
There are even a new line of display technologies called OLED (Organic LED) which are organic (hydrocarbonic) materials that when applied with a voltage light up like a LED. This means that OLED produces its own light rather than polarizing light like an LCD. Very similar to Plasma but high picture quality and very thin display aswell as low power consumption.
Tell me if im wrong thank you.
i am interested in designing a custom headlamp. do you know of any sources that can manufacture the housing for the led bulb?
I want to build a light bank, similar to a 4-tube Kino Flow Flurescent but with high brightness LED's or LED strips. These light banks would vary from 2-4 feet in length by one foot to 18 inch in width. They need to be able to deliver the equivalent of 500-1000 watt of tungsten light. Any idea as to where I could get such led strips and what their model numbers would be. Would need also to add dimming and DMX control.
I need to build a small lighting system (mini flashlight) with one LED (low power and restricted angle of light) in order to test a sensitive luminometer at variable distance.
My idea is to obtain a battery based system for each wavelenght I wanted to test.
Initially I want to build 8 different flashlights : Violet 430 nm Blue 475nm, Green 520nm, Yellow 575nm, Orange 600 nm, Red 700nm and IR 950 nm
Do you have one adaptable flashlight , neded to be able to switch on/off easyli
Which Led could I could fit to it?
Finally it should be small enough to be placed in a sealed waterproof housing
Thanks in advance
I live in Norway. We have a bath room on 1. floor. It is isolation in the roof to avoid freesing to death.
If you install LED downlights in the roof what spesifications must you follow to avoid condensation from de cold above?
I'm loooking a LED driver which is able to operate with input voltage <5V and is capable to drive multiple (let assume 5pcs in series) high power LED (forward voltage = 3.2V, forward current = 350mA). So far I found one which is ZXSC310 from Diodes Inc and i downloaded related application note (DN61 - Dual cell powered ZXSC310 solution for a high power white LED).
In that application note, it illustrate the detailed operation with single 1W LED as example. Please kindly advise
- For ZXSC310, is it possible to meet above mentioned application (1W LED x 6 in series)? Any reference circuit to execute it (if it's different from application note)? What is max number of LED that i could drive in series based on the reference circuit as I can't find any information about max output voltage?
2. I believe i can adjust Rsense in order to get desired LED current. But then what i should do in order to adjust output voltage and to overcome the cumulative forward voltage of series LED? Anything else I need to take note?
Please recommend any other LED driver (single channel) if you could find something which is able to meet my above-mentioned application.
Also, could you please recommend any LED driver which has multi-channel (3 or 4 channel) and could meet (or partially meet) above specification?
How to detect a faulty LED due to which the series LED circuit would be off ? How the detection couuld be made fast?
I am planing to make an infrared flashlight, i want to make it with this led: OSRAM - SFH4235 - IR EMITTER, 850NM
So it uses 1 A and 3 volts, now, i ask how should i get it to glow, do i need a resistor or can i just connect it on 3 volts of dc, if i need a resistor which one ?
a simple diagram of how to connect this ir diode to the 3 v battery would be nice, please someone help me with this.
or do i need a led driver i have this one: http://uk.farnell.com/on-semiconductor/cat4101tv-t75/driver-led-25vin-1a-5to263/dp/2102570
it is 1A but it is 3.5 v that can be lowered to 3 v with a resistor and wont effect the amperage am i right ?
i am a beginner with electronics but i understand some basic things.
thanks in advance.
I am doing a project for my workbench. I wanted to install an array of Leds about 16 to 32 LEDs for a start mounted on top of the work bench and illuminate the work area based on the ambient light from the background. I do not know how to go about the multiplexing and is it possible to use arduino for this? What would be the appropriate arduino to choose? I am new to arduino and did not do any design stuffs at all. Can give some advice?
Hi, im new to displays and led matrixing and i would like to start a project using an led matrix. Im going for an 8x8 grid and after a bit of learning and research, i found a problem. How should i control the led's? I am aware of 2 popular choices; using shift registers (serial to parralel) or multiplexing. Which one would be the most effeiceint and overall a best option? Also how should the matrix be arrainged?
I HAVE DONE ENGINEERING IN ELECTRONICS AND COMMUNICATION...NOW I HAVE BEEN RECRUITED BY A LIGHTING COMPANY ......AS I HAD DONE MY PROJECT IN LIGHTING...IT WAS AUTOMATIC SWITCH ON AND OFF OF LED LIGHTING SYSTEM ON HIGHWAYS. CAN YOU TELL ME, WHAT WORK WILL BE ASSIGNED TO ME IN THAT LIGHTING COMPANY ???
Working on a protype vest for my son, he likes hiking but doesn't like headlamps or holding a flashlight. We do a lot of hiking in the evenings and when it gets dark we turn back home but he's scared to not be able to see where he is going. I am making him a light weight vest since he's 2.5yrs old to heavily illuminate his way but I am running into issues that a 8AA pack 12v LED system is bulky and if I used a 12v Energizer the battery life is low and it dims fairly quickly. Ideally I would like an hour battery life that is light weight and anything longer then that would be AMAZING. What can you suggest I try?
This thread has been closed to new questions.
Thank You, Your Friends at element14 Community