As an electronics engineer, I used to despise the lighting industry. I considered it as a low-tech application. After some detail research on Internet, I change my mind. The lighting is as complex as any others technologies. It is interesting, fantastic and a lot of companies invested heavily in lighting market.
Thomas Alva Edison was one of the greatest inventors. The light bulb was the brightest one among his inventions. Another great invention vacuum tube was also inspired from the light bulb. The goal was only to provide a method of supplying the world with inexpensive, widely available commercial lighting. It was a great achievement, but some flaws were revealed in coming centuries.
Solid State Lighting - [Link]
This project provides an simple F1 motor racing style 5 light race start sequence with a random delay that you can use on a real race track, kart circuit or even your slot-car circuit.
Operation is simple; when the start button is pressed all the LED clusters are off. They then illuminate sequentially at one second intervals until all five LED clusters are on. After a random interval between 1 and about 7 seconds the LEDs extinguish, signalling the start of the race. Once the LEDs have extinguished simply press the start button again to initiate another race start sequence.
F1 Gantry Race Start Lights - [Link]
The idea is to use this as a simple “lighthouse” that when powered up will rotate the beam around the 12 LEDs.
The project is written for the PIC12f683 using SourceBoost Technologies BoostC that I use as a tool suite in Microchip’s MPLAB. BoostC is fairly ANSI so if you’re using another C then it wouldn’t be hard to convert. There’s a free version of BoostC too and I think my program will fit within it’s limits.
Sure-Electronics sells a nice Luxeon led driver board capable of delivering 700mA to up to 5 luxeon leds in series. The board is priced at 9.99 USD. Check this out.
Preset Current: 700mA, it may vary from 690-710mA.
Current Ripple: 14mA RMS, 76mA p-p.
Maximum Input Voltage: 25V DC.
Suggested Input Voltage: 6-24V DC.
Efficiency: 78% @ 14V input, 3*3W Luxeon LEDs in serial connection.
3W Luxeon LED Driver – [Link]
Want 600lm of true light power form a single led (actually a led cluster)? Check out this powerfull led found on ebay. It’s priced for 25.99 USD and free international shipping.
- Lens Color : Water Clear
- Emitted Color : white
- Intensity Typ. : 600Lm
- Viewing Angle : 160°
- Forward Voltage : 12V
- Forward Current : 1000mA
10W White LED – 600lm - [Link]
If you have anything to do with DIY electronics, circuit bending, or just messing around with microcontrollers, you will undoubtedly amass quite a collection of LEDs. A great majority of these will be clear, and will only show a color after applying a voltage to them. Also, if you order a batch, some of them will not work, and the only way to find out is to test them. So I’d been wanting to build an LED tester for a while. It seems like every time I wanted to make a project involving LEDs, and when first powering up my circuit, of course the LEDs don’t light up. You know that it is probably in the wiring or programming, but you’re not quite sure if maybe the LED is bad. Now you won’t have to wonder anymore. And of course, I made it out of something fun…
Lemon Led tester – “Juice your leds” - [Link]
As you can see, the candle is run from a PIC12F675. This is an 8 pin microcontroller with 5 I/O lines. I decided to run the candle from 4 AA batteries, giving me a 6 volt power supply. The battery holder provided a nice base to help the candle remain upright. Because the PIC requires 5 volts, I added a 1N4148 diode that has a 1 volt voltage drop, thus providing me with 5 volts. I used five 15,000mcd LEDs (very bright) to give me a bright flame. This makes the candle much brighter than my storebought candle. I also used 5 LEDs as it gives a much more realistic flame, looking more “flickery.”
LED Candle - [Link]
Often times when people get started in electronics, they want to blink LEDs. This is this a great idea, and we really like blinking LEDs, so we’re happy to help. In the last year or two there’s also a growing chorus of people that want to drive high powered LEDs. That’s not always as easy, but it can be done.
Easy high-power LED blinking circuit- [Link]
The Danger Shield is an add-on for the Arduino micro controller board. It contains a variety of fun and useful electronic circuits that you can use to do fun and useful things. It is a fully self-contained shield. You plug it into your Arduino, and you can immediately start using it. No extra things to hook up, no external components. Just a really rad board ready to rock. Soldering required. [via]
- 3x Linear sliders w/ integrated LEDs (independently hooked up to PWM)
- 3x Pushbuttons
- 2x Indicator LEDs (each with a PWM)
- 1x Piezo buzzer (for making noise!)
- 1x Temperature sensor
- 1x Light sensor
- 1x Knock sensor
- 1x 7 segment LED (with shift register)
- Power LED and reset button
Danger Shield - [Link]
This project uses RGB LEDs to create a clock face. Each hand is assigned a colour and as the hands overlap on the face of the clock it mixes the colours.
The clock uses a single AA battery to power the display which is boosted to 5 volts with a switching mode power supply. The power supply should be able to use any AA battery that is at 0.7 volts or higher, which means that it should still work fine with AA batteries that may be “dead” when used in other devices.
The heart of the clock is a DS1307 realtime clock with a CR2032 coin cell battery backup. The battery should be sufficient to keep the time for at least a couple of years.
LED Desktop Clock - [Link]