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Overview of the UV led modulator.
It consists of an opamp controlled constant current source. The opamp used is the TLC272 (one of my favorite opamps) driving an FZT953 PNP transistor. The current delivered to the UV led is about 18mA.
The LED has a BAT42 diode and a resistor and capacitor snubber over it. The goal is to replace the LED by a 405nm laser diode, these diodes are very sensitive to over and undershoots and need to be carefully protected.
Parallel to the LED is a BS170 mosfet that rapidly turns off and on to modulate the LED.
The schematic is more or less based on this circuit from a Laserjet II laser driver:
www.repairfaq.org/sam/rg1-1594.jpg
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LEDs
4” Waterproof Flexible 6 3528 type SMD LED Strip
Input voltage: 12V DC
Long life span: 50,000+ hours
Purchased on ebay for $5 each
Cabinet
Wildwood Designs custom made cube stacks
Standard Features
Base/Clear Paint with Lifetime Warranty
Limited Lifetime Structural Warranty
Double Insulated Honeycomb Roof
Fixed Front Window
Front Sliding Window
Framed Rear Door, Double T-Handle, Dark Tint
LED Third Brake Light
Interior Dome Light
Available Options
Double Clothes Hangers
Front Drop Slider or Drop Picture Window
Charcoal Interior Headliner
Oversized Side Sliders, Dark Tint
Side Access Doors, Standard or Oversized
Side Storage/Tool Boxes
Luggage or Commercial Style Roof Rack
Rubber Bottom Seal
Art Assignment project for the Whitescapes episode. We were asked to put white on white and then record in two different lights.
This is under an LED spotlight.
Assignment here: www.youtube.com/watch?v=hOHmfuD58lM&feature=youtu.be
Yarn on paper, spelling out a phrase I wrote in my notebook ages ago.
■ 1일, LED 광원 22인치 와이드 LCD 모니터(W2286L) 선봬
■ 밝고 선명한 화질과 20mm 슬림 디자인 구현
■ 소비전력도 최대 40%까지 절감
■ 밝기 자동조절, 사용시간 알림 등 시력 보호 기능도
LG전자가 LED를 광원으로 채택한 22인치 와이드 LCD 모니터
(모델명:W2286L)를 1일 첫 출시했다.
이 제품은 LED를 광원으로 밝고 선명한 화질을 구현했으며, 일반(CCFL) LCD 모니터의 절반 수준인 20mm로 두께를 줄였다.
2백만 대 1의 명암비를 구현하고도, 소비전력은 최대 40%까지 절감했다.
Product Features:
Light source: Super bright or normal bright 3528 SMD LEDs
Power Factor (PF) > 0.95
Lower electric current for high brightness, therefore less light decay and longer lifespan
80% Energy-saving over traditional fluorescent tubes
Less than 10% luminous decay in 50,000 hours
50,000+ hours lifetime
Aluminum alloy body with transparent or frosted plastic cover
Easy mounting: working without electronic ballast or starter
Solid state, High Shock/Vibration Resistant
No RF Interference
Instant start without Flickering
Low thermal elimination
No mercury and other Hazardous Materials, fully ROHS-Compliant
Wide voltages available: AC85V-165V or AC165V-265V
Applications:
General and commercial lighting for homes, offices, restaurants, hotels, warehouses, factories, parking lots, shopping malls, buses, trains, etc.;
Accent lighting or Task lighting: cabinets, cupboards etc in homes, restaurants or kitchens;
Back lighting for square billboards or advertisement boards;
Display lighting for the articles in stores and shops.
Installation methods:
1. Our LED tubes are completely in consist with traditional fluorescent tubes and therefore it is no need to make special bracket for it.
2. Remove the starter and the whole electronic ballast from the traditional fluorescent light bracket and install the LED tube onto it.
Website: www.haichanglight.com/
03/06/2026. London, UK. The Prince of Wales during a visit to The Prince of Peckham Pub, a community-led venue established in 2017 by Clement Ogbonnaya. The Prince heard about the venue’s community programmes, including “Chatty Patty”, a weekly initiative providing free tea and conversation to those seeking companionship and social interaction. His Royal Highness met participants and local residents involved in the programme, highlighting the important role of community spaces in supporting wellbeing and reducing isolation. Picture by Andrew Parsons / Kensington Palace
I needed an IR emitter source for the Wiimote to try the whiteboard program on my PC. Because Infra-red light is not visible to the human eye, my intention was to use a digital camera's CCD sensor to help me "see the light". In my quest for perfection, I turned on the macro-mode in order to better focus the LED and half-depressed the camera's shutter. One-handed operation of the camera with my left hand (I'm right handed) caused me to depress the shutter a little too hard and snapped this picture of the emitter device and some of the mess on my desk. I found it pretty interesting so I decided to upload it.
So, not only was this clock awesome, but all of the clocks in the clock department were set correctly. I'm lying when I say "all." Still, 90%...
LED-Säule mit 2m Höhe und 15cm Durchmesser, Fuß ebenfalls aus Plexiglas. Diese Säule wird von innen mit 2 x Astera AL3M beleuchtet. Die LED-Leuchte hat eine RGBW-Farbmischung und einen starken LI-Akku. Sie ist steuerbar per Infrarot oder per Funk (W-DMX).
Die Säule ist absolut regensicher.
Zu mieten in Berlin und Hannover bei
On this picture you see a person in a LED-lit white suit that is testing illuminated banners and waving a flag in order to be able to communicate.
credit: Michael Kaczorowski
Lothian's experimental LED front destination screen is seen here working Service 10 and the beauty of electronic devices like this is that they can be changed simply and at the touch of a button. One day this might allow for greater flexibility when it comes to sudden alterations that have to be made along the route.
In this shot note the pinky shade of the intermediate and service number details while the destination 'Western Harbour' is now more bold and in a stronger white. This is clearly visible to the eye but may just have been an error or alteration on the day who knows? One thing is for sure we should be ready to snap at 846 everytime we see her to compare all the different versions of text.
For a look at many of the possible screens Lothian's 846 is capable of showing visit my LED set for some recent examples, including some in-depth technical information on how it all works!
www.flickr.com/photos/stuart_montgomery/sets/721576259550...
Note to the left in this picture Gemini 847 is passing along Princes Street beside the RSA gallery.
The Royal Scottish Academy gallery was designed by William Henry Playfair during the 1820's. Along with the adjacent National Gallery of Scotland, their neo-classical design helped transform Edinburgh in to a modern day Athens of the North.
The statue of Queen Victoria on the top the building was sculpted by Sir John Steell. Exhibition space is shared throughout the year by the RSA with the NGS and other exhibiting societies, notably the Society of Scottish Artists, Visual Arts Scotland and the Royal Society of Watercolourists.
CREE LED Chip. 300 Lumens. Red aluminum case. Operates in 1 AAA battery. 9cm/3.5 inches length. Tail-cap On/Off switch. Waterproof.
Peggy 2LE: a new, smaller open-source LED display project, based on Peggy 2.
Read more about this here.
These tails were shipped in to swap internal circuit boards from the stock units to the new clear units that were experiencing LED failure on the turn signals, as well as on the parking lights.
Une montre-bracelet de sportive est nécessaire pour les activités extérieures. Si vous êtes à la recherche d'une montre-bracelet de style énergique et de sportive, visitez le site Ibuzone.com et acheter cette montre-bracelet à la mode et de sport avec double mouvement DH-012.
Cette montre-bracelet est conçu dans un style énergique et sportive. L'apparition a un sentiment de mécanisme, qui est vraiment cool. L'avantage de cette montre-bracelet sur les autres, c'est qu'il a deux types de mouvement, électronique LED et de quartz. Par conséquent, cette montre-bracelet est plus durable et précis dans l'indication de temps. Autres fonctions de base, telles que l'affichage jour et date et réveil sont également inclus.
www.electroniquestout.com/montre-a-la-mode-et-de-sport-av...
led litec is a manufacturer of high technology led lighting and light emitting diode bulbs, tubes, corn lights, indoor and outdoor lights, industrial & commercial lighting, strip lights, ropes and led neon tubes. www.ledlitec.com
Whether at workshops, or working on a project, I'm always cutting LEDs to fit flush into a breadboard. This usually involves me holding the LED against the side of the breadboard, and then clipping the anode leg. That leg gets clipped just a millimeter shorter than the breadboard itself. Then the cathode in turn gets cut slightly shorter than that.
With enough repetition, I've gotten pretty good at it, but then there's breadboards like this one that are already mounted on something, or have something blocking access to the edge. Other times, when hosting a kids workshop, they always forget which leg they cut first, or often cut straight through both legs of the LED.
To resolve this problem, I turned to 3D printing. I modeled a small cube that was the depth of a typical breadboard, less a couple millimeters. Then I put two cylinder holes of 1mm each in diameter, space exactly 2.5mm apart - the distance between breadboard holes. Finally, I notched out two more millimeters on one side of the cube. The result when printed is an easy to use LED cutting guide.
Simply place the LED legs through the holes. Put the anode (longer leg) on the deeper side. Put the cathode (shorter leg) on the other side, and slide them both through the holder. Break out your clippers, and trim flush with the LED holder on each leg. If you cut too far when cutting the anode, and accidentally trim the cathode too, that's not a problem. You can clearly see which is which, and then just trim the other side from the cathode. Your freshly cut LED will now fit perfectly flush into a breadboard.
LED Lighting
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