The TSL2584TSV from the Austrian company ams AG is a highly sensitive light-to-digital converter chip that converts light intensity into a digital signal output via its I2C interface. The chip sensors consist of one broadband photodiode (sensitive to visible plus infrared light) an infrared sensitive photodiode and a photopic infrared-blocking filter on a single CMOS IC. Two integrating ADCs convert the photodiode currents into a digital output that represents the irradiance measured by each sensor channel.
The digital output value can be used by an external processor where the illuminance (ambient light level) in lux can be derived using an empirical formula to approximate the sensitivity response of the eye. The TSL2584TSV can also generate an interrupt which remains asserted until cleared by firmware. The chip operates from a supply rail between 2.7 and 3.6 V and can handle a maximum light intensity of 33000 lux. The chip is packaged in a 6-pad TSV outline measuring just 1.66 x 1.145 x 0.32 mm.
A Tiny Light sensor – [Link]
This device is a home automation lighting solution based on the presence of a person inside the room. When a person enters or leaves the room, the circuit automatically turns the lights of a room ON and OFF respectively. It also has a memory element which eliminates undesired switching of the lights in the event of more than one person entering or leaving the room
Home Automation Lighting Control – [Link]
by Colin Jeffrey @ gizmag.com:
In the pursuit of ever-shrinking circuitry for nanotechnology electronics, increasingly smaller devices and components are being developed. Now researchers at the University of Konstanz and the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) claim to have micro-miniaturized the humble electrical switch all the way down to molecule size and proven its operation for the very first time. Unable to flick such a tiny switch mechanically, however, the researchers instead used light to turn it on.
World’s first light-activated, molecule-sized switch gets turned on – [Link]
by Jesus Echavarria:
This project starts a few weeks ago. My six years old daughter usually sleeps with a light on in her bedroom. Talking with her, we decide to hack her LAMPAN Ikea lamp to make some improvements, including a manual RGB controller to set the light colour, a timeout to turn off the light after 30 minutes without changes and a bluetooth connection to control the lamp with a smartphone or tablet. So, if you continue reading the post, you’ll see what we develop!
Hacking a LAMPAN IKEA lamp to add RGB light and BT – [Link]
The wonder material with so many extraordinary properties has found its way out of the research lab and into a commercial product. This new product will surely posses super powers and allow us to do things we thought impossible and probably change our lives for ever. Well, actually no. In this case Graphene has been used in the reinvention of what was arguably the first commercial electrical device patented back in 1879. It is perilously close to April 1st but the National Graphene Institute has announced they will be producing a light bulb based on graphene.
The light bulb has an LED shaped like a filament coated in graphene. It is thought the new lamp will use 10 % less energy compared to conventional light bulbs. Manufacturing costs are also lower and it will be made using more sustainable components. The company behind this new light bulb is Graphene Lighting. Professor Colin Bailey is a director of the company and also deputy vice-chancellor at Manchester University. According to Prof Bailey the light bulb should be available later this year and will be priced around $22.
The future looks bright for graphene – [Link]
We can control almost everything from our smartphone, tablet or smart watch these days, and thanks to the CleverLight™ Wi-Fi LED bulb, you can now control your lighting remotely without additional box.
We are pleased to announce that we have launched a new and unique product CleverLight™ Wi-Fi LED bulb.
Installation is as simple as removing your old bulb and installing CleverLight™ Wi-Fi LED bulb. Wall switch retains functionality.
In comparison to an incandescent bulb which lasts approximately 1,000 hours, CleverLight™ Wi-Fi LED bulb last at least 25,000 hours apiece at an estimated lifetime more than 20 years. With our LED technology 85 percent less power is needed than incandescent bulbs. CleverLight™ using up to 9 watts compared to a 60 watt incandescent bulb. Be smart with your energy.
To create the best user experience possible, we use Smart Config™ — a one-step and one-time process used to connect the CleverLight™ to a Wi-Fi network.
Just connect your Wi-Fi enabled phone or tablet to your access point, then enter your network’s password into the CleverLight™ App, and the setup process completes in less than thirty seconds.
CleverLight – Affordable Smart Wi-Fi LED Light Bulb – [Link]
The VL6180X is the latest product based on ST’s patented FlightSenseTMtechnology. This is a ground-breaking technology allowing absolute distance to be measured independent of target reflectance. Instead of estimating the distance by measuring the amount of light reflected back from the object (which is significantly influenced by color and surface), the VL6180X precisely measures the time the light takes to travel to the nearest object and reflect back to the sensor (Time-of-Flight).
Combining an IR emitter, a range sensor and an ambient light sensor in a three-in-one ready-to-use reflowable package, the VL6180X is easy to integrate and saves the end-product maker long and costly optical and mechanical design optimizations.
VL6180X – Proximity sensor, gesture and ambient light sensing (ALS) module – [Link]
by blog.gbola.com :
Every year I notice that I have little issue waking up at 7am during summer months, yet waking up at 8am during winter is always unpleasant. Some quick research led me to find that the body is gradually woken up by light, which is why products such as the Phillips Wake-Up Light exist. However, with a starting price of £60 for the (very) basic version, I’ve opted to make my own smartphone-connected, automated wake up light instead.
DIY Automatic Wake Up Light – [Link]
The OPT3001 is a sensor that measures the intensity of visible light. The spectral response of the sensor tightly matches the photopic response of the human eye and includes significant infrared rejection.
The OPT3001 is a single-chip lux meter, measuring the intensity of light as visible by the human eye. The precision spectral response and strong IR rejection of the device enables the OPT3001 to accurately meter the intensity of light as seen by the human eye regardless of light source. The strong IR rejection also aids in maintaining high accuracy when industrial design calls for mounting the sensor under dark glass for aesthetics. The OPT3001 is designed for systems that create light-based experiences for humans, and an ideal preferred replacement for photodiodes, photoresistors, or other ambient light sensors with less human eye matching and IR rejection.
OPT3001 – Ambient Light Sensor – [Link]
by w2aew @ youtube.com
The Humanalight is a simple single-cell flashlight kit that will produce usable light, even from a “dead” AA battery. Circuits like these are often called a Joule Thief. This term has been applied to just about any circuit that allows you to boost the voltage from nearly depleted batteries for some other low-power application – such as lighting an LED. Strictly speaking, a Joule Thief circuit is an Armstrong style blocking oscillator that uses a bifilar wound transformer and relies on the saturation characteristics of the core to produce oscillation. This flashlight uses a simple two-transistor relation oscillator. A description of the circuit is given, and its operation is examined by viewing the waveforms on an oscilloscope. The proceeds from the sale of this kit benefit the “Ears To Our World” charity which provides self-powered radios and other technology to rural, impoverished and remote regions of the world.
Circuit Walkthrough: A single cell LED light – [Link]