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LED Bulb or Tube vs Incandescent Bulb and fluorescent tube
1W 10W
3W 25W
6W 50W
7W 60W
10W 75W
15W 100W
Contact: Mr. Lee
Email: hileds@gmail.com
MSN: hileds@hotmail.com
Once in a while I sell one or two of the RGB LED RING boards. As not everybody feels comfortable with soldering SMD parts (and I've explicitly warned that it's not that easy and that the RGB LEDs die easily) I do some 'contract soldering' from time to time as well.
Today I've killed 3 - THREE - of these friggin' things, and I only have about 10 spares left. That's a loss of more than 1€ of semiconductor. Time to get more spares it seems.
In this shot I managed to show what's going belly up here. It's always the green ones that die. As shown here, the bonding wire has been ripped off the left pad due to stress.
Looking at this image again a few hours later, it seems the whole pad has moved to the left opening a gap of maybe 0.1mm. What a heap of shit. Could the surface tension of the solder create such a big force and pull the pad out of the somewhat softened plastic body?
I'm trying to keep the heat down and be quick, but today was a very bad soldering day. I have a feeling they wanted to save time and material in the bonding process and the wires are a bit overstressed anyway. Maybe they also 'tweaked' the gold content a bit and it got too brittle.
If these LEDs are soldered in a reflow oven this problem might not occur at all, as the epoxy around the wires will soften a bit. Given the correct temperature-vs-time profile is used. Time to get an SMD toaster? Maybe. Any recommendations? Hotplate? And I don't want to spend a fortune on it as well. Oh BTW, I hate things that suddenly just sublimate without any signs of warning! I'm looking for reasonably priced quality products here. Nothing fancy, but fully functional with a minimal amount of cursing.
Today was also the very first time that I just couldn't reliably upload code using a bootloader with the chip running on the internal 8MHz RC oscillator. Maybe this is due to the somewhat elevated temperatures we're having here right now. It's in the middle of the night right now and I'm still getting 26°C in my room. Or maybe this AVR's factory calibration is just terribly wrong. Luckily I had previously assembled another one of the boards, so I just swapped them. The good one is sent away and I keep the rebellious one for further testing. I'll put it into the freezer tomorrow and see what happens to it.
Sam and myself took some long exposure pictures in the basement of Cord, in the northern quarter, manchester. One of us was posing while the other one was drawing shapes with an LED.
Another of the same, so hard to get but so worth it. Thinking of getting the Red LED Head for it/A full one next.
LED display applied in everywhere.
pixel pitch as below:p4,P6,P8,P10,P12,P16,P18,P20,P25,P31.25,P37.5
With excellent quality , competitive price,efficiently after sales service team !
Pictures just can't do these microlights justice. These incredible LED microlights come together in amazing color combos to create the best glove sets and light shows. This glove set comes with 12 microlights in your choice of either Dropz, Tripz or MicroMax microlights. Read below for descriptions of each type of microlight and LED colors in the glove set. www.rave-nation.com/led-gloves-light-gloves-rave-gloves/c...
Add a couple of bright white LED's (10000 mcd) to swimming goggles and you've got a cheap strobe capable of photic driving.
Can be fed audio output from an MP3 Player or a PC sound card. Most of these devices can generate 4Hz or lower signal at a high enough amplitude to drive this circuit.
I would think almost any opamp could be substituted...TLC272 only chosen because it was the closest handy.
You can create low frequency wavefors easily using Audacity via Generate Menu ==> Tone... select low frequency (ie: 8Hz), amplitude=1. You can append multiple tone generations to get a range of strobing frequencies. If you select the 'Chirp' option you can create a sweep.
Then export the file as MP3 file and play out PC soundcard or load into MP3 player if you want this to be portable.
Audacity found at: audacity.sourceforge.net/
***WARNING*** Strobic flashing may cause epileptic seizures for predisposed individuals....it's rare but you might want someone around when you use this the first few times.
My home made microphotography rig.
The rig was built mostly for parts I had lying around the house.
It consists of a motor driven focusing rail, specimen stage with backlight and mini ring flash.
The whole lot is controleld using an Ardiuno microcontroller board and motor control shield.
For more information about this rig, visit my blog post here
Early doors boxing day found me down the beach with the kids for the annual, Tenby, Boxing Day Swim.
AROUND-THE-WORLD adventurer Rosie Swale Pope led hundreds of bathers into the sea for yesterday’s Tenby Boxing Day Swim.
The event, organised by the Tenby Sea Swimming Association and sponsored by cottage letting agency FBM Holidays, has helped five charities this year, including Barnardo’s Cymru, the British Retinitis Pigmentosa Society, Plant Dewi, Sandy Bear and Friends and the Tinkers Hill Trust.
Partygoers arrived at North Beach at 11am to watch the swim and enjoy a raft race, sailing and canoe races, a lifeboat launch and fancy dress parade.
Commemorative medals were presented to all swimmers, who dried off around a beach bonfire.
THE fund set-up to raise money in memory of murdered newlyweds Ben and Catherine Mullany has topped more than £33,000.
The couple, both 31 and from Pontardawe, Swansea Valley, were shot on the last day of their honeymoon on the Caribbean island of Antigua in July.
My 2009 Jaguar XF 3.O Diesel Portfolio with dealer fitted aerodynamic kit & LED blades.
Hiding in he background is my Jeep off-roader for when the going gets too tough (or dirty) for the Jag
An earlier drilling test can be seen to the right of the LED's. As it stands I am not sure I am a fan of our current plan, each LED cluster will require 4 holes, which equates to 56 * 4 = 224 holes, each one of which needs to be pretty precisely placed to not over bend the LED leads and not to drill them so close that the holes merge.
Built using a couple layers of acrylic, some rivets, a little bit of love and a few trials and errors… and this lovely LED lit badge was born! Utilizing black and clear acrylic this nice little badge looks great with no LED lit as well, but LED's make everything cooler.
Nile's drum circle gathering every full moon, featuring the beautiful and talented hoop master, Renee.
"LED Downlights - The Popular Decorative Lighting Solution
Wondering what kind of lights to install in your home or new apartment?Read More : bit.ly/1oNF3kq";
Our under cabinet "rope" lighting needed replacing so we decided to try something different this time around. We settled on going LED and selected the 12v tape shown in these images. Local sources were few and any that we found were very expensive so we purchased everything we needed on eBay direct from vendors in China.
There are several LED sizes and densities available so we settled on the 3528 size with 600 LEDs in a 5 meter (16.4 feet) length. That's about 3 every inch. The tape we purchased is weatherproof which means it is encased in plastic. There was also an adheasive back to it.
We purchased a 5 meter roll of tape, a 60w 12v power supple, some connectors, and an adaptor to connect our lighting to the power supply for about $35. A few calculations showed us that the entire roll needed about 30 watts so I purchased a 60 watt just to be on the safe side. I ended up using just over half of the roll.
We have these lights on a timer so they go on/off automatically.
A Follow Up....
As mentioned above, I powered the installation with a 60w power supply exactly TWICE what the whole roll required. Since I only used about 1/2 of the roll, I ended up over powering things a lot.
Anyway, the LEDs only lasted 3-4 months before some (most) of them burned out.
In hindsight, I should have used a lower wattage power supply AND put a dimmer in the line to reduce brightness.
1. Base type: E27
2. Light source: LED 3*1W
3. High power led: SSC/Cree/Luxeon/Edison/K2 Luxeon/K2 Edison
4. Lumens output: 3*1W:180-270lms;
5. Lens beam angle: 30 , 38 , 45 , 60 degree
6. Working current: 350mA/700mA
7. International Protection: IP44
8. Color available: white, warm white, cold white, red, green, blue, yellow, RGB
9. Input voltage: 100-240V AC 50/60Hz
10. Power consumption: 3W
11. Working temperature: -20 degree Celsius--+50 degree Celsius
Features
1. Energy-saving, Environment friendly, and only 20% power consumption of halogen lamp and incandescent lamp.
2. Long lifespan >50,000 hours.
3. Wide voltage design available.
4. Anti-shock, Anti-moisture and No glare, No strobe light.
5. MR16, GU10, E27, E17, E14, B22 is available.
6. Can use dimmer with DMX512 to control brightness.
Application
To replace the traditional halogen lamp, and widely applied in store, display window, hotels, house, exhibition halls, and other local decorative lighting projects.
A cool LED light installation in the lobby of the Telus Tower in Toronto, Ontario, Canada. The LEDs cycle through the visible colour spectrum in a coordinated manner which was pretty cool to watch.
Esempio di illuminazione generale tramite fari da incasso a Led da 8W. I fari montano otto Led Seoul P4 colore bianco 5500K.
La notevole durata, l'assenza di generazione di calore, il ridotto consumo di energia elettrica, l'omogeneità di emissione luminosa nel tempo ( a differenza delle lampade a ioduri metallici o CFL ), sono solo alcuni dei vantaggi dell'illuminazione Led.
Interesting fact: Unlike incandescent bulbs, LED Christmas lights do not burn constantly. They flicker on/off many times per second. This photo illustrates that.
I forgot to unset the 2-second delay and pitched the camera forward to see what was wrong. While looking at the LCD screen, the camera took this 1/4 second shot.
While the CFLs and daylight in the picture are fluid, the LEDs on my deck are staccato.
Solar LED Lantern Distribution, Bhako Village May8, 2012
Tharparkar District, Province of Sindh, Pakistan
Pervaiz Lodhie “Pehli Kiran” socio-economic poverty alleviation program for rural Pakistan’s poorest marginalized communities. 500 LED Lanterns
Manufactured and donated by Shaantech KEPZ Karachi gifted to 500 families of Bhako, Kharoro and Vekasar Villages. These villages are only couple of miles from the India border, Nagarparkar area of Thar desert. Majority of people are Hindus. No roads into these villages. We had to use 4-Wheel Drive UNDP vehicles.
Trip and distribution facilitated and supported by:
Masood Lohar, UNDP Green Environment Facility (GEF) Small Grants Programme
Abbas Khoso, Integrated Rural Awareness and Development Organisation (IRADO)
Present on the trip:
Pervaiz Lodhie, LEDtronics, USA
Shahid Siddiqui, Shaan Technologies (Pvt) Ltd, Karachi, Pakistan
Simple demo of the LED driver, and the look of two different types of diffusers.
Also shows the results of my first real attempt at SMD skillet reflow. (woot!)
(wish I could get the lighting/exposure to both be long enough to hide the scanning but short enough so the light from the LEDs doesn't blow out the image)
Spot led per l'illuminazione di una nicchia espositiva. Lo spot monta tre led da1 W con diverse temperature di colore : 1 led 2800K, 1 led 3500K, 1 led 5500K. In questa maniera è possibile modificare il " colore " della luce bianca dall'estremo caldo a quello freddo, tramite una centralina a pulsante.