In this project, we’ll demonstrate how to make a colorful, king-sized coconut tree (5 feet) decorative showpiece using a digital RGB LED strip.  The RGB LED strip is cut and arranged to form the shape of a coconut tree. The ATMega328 microcontroller is used to control the LED strip, generating several flashing, fading, and blinking…

STMicroelectronics’ HVLED101 90-400V flyback controller for LED-lighting applications up to 180W enhances performance and simplifies design through extensive feature integration, patented control techniques, and support for primary-sensing regulation. Joining ST’s HVLED family of high-power-factor controllers, the HVLED101 contains 800V startup circuitry that cuts the LED turn-on time to less than 250ms. High-voltage input-sensing circuitry and a maximum…

In this project, we’ll design a unique door lock that can be operated without a keycard, input password, or biometric ID. A smartphone is the key to locking and unlocking the door via Bluetooth.  This door uses a solenoid lock, which relies on a latch for electrical locking and unlocking. It also has LEDs to…

Smart Eye, specializing in artificial intelligence (AI) to build technology that supports and predicts human behavior, and STMicroelectronics, a global semiconductor provider, announced the cooperative development of a high-sensitivity, 1-LED driver-monitoring system (DMS). Combining Smart Eye’s expertise in driver-monitoring algorithms and optical system design with ST’s high-sensitivity automotive-grade global-shutter VB56G4A imager, the new DMS reduces…

The Optoelectronics group of Vishay Intertechnology, Inc. introduced a new AEC-Q101-qualified reflective optical sensor for automotive, smart home, industrial, and office applications. Offering a lower profile than previous-generation solutions — while delivering improved performance with a higher current-transfer ratio (CTR) and operating temperature — the Vishay Semiconductors VCNT2025X01 combines an infrared emitter, silicon phototransistor detector,…

LED lighting is becoming more important in every car segment: It increases road safety and enables new design trends, such as flexible styling. To address the resulting requirements, Infineon Technologies is expanding its LITIX Power family with the dual-channel, stand-alone DC-DC controller TLD6098-2ES. The controller is the first product that can drive a full LED…

STMicroelectronics’ STNRG012 is a highly integrated and space-saving digital power controller with advanced distortion mitigation that delivers an ideal solution for LED-lighting applications. The device contains a multimode power-factor correction (PFC) controller, resonant half-bridge controller, and 800V startup circuit that’s all managed by a digital engine. The PFC controller changes dynamically between transition mode, discontinuous-current mode (DCM),…

Toshiba Electronic Devices & Storage Corporation has launched two new photorelays, “TLP223GA” and “TLP223J,” with an OFF-state output terminal-voltage rating of 400V and 600V, respectively. They both feature low input power, improved switching characteristics, and are housed in a DIP4 package. The new products come with a highly luminous efficiency LED developed and have a…

Toshiba Electronic Devices & Storage Corporation has introduced two photocouplers, “TLP5705H” and “TLP5702H,” housed in a thin SO6L package, for use as insulated gate drivers for small to medium-capacity IGBTs/MOSFETs. Volume shipments have already begun. TLP5705H is Toshiba’s first product to deliver a peak output current rating of ±5.0A in a thin package (SO6L) of only…

Allegro MicroSystems, a global provider in sensing and power solutions for motion control and energy-efficient systems, has expanded its automotive lighting portfolio to include two new offerings for advanced driver assistance system (ADAS) applications. A unique solution in the market, the A80803 leverages multi-topology conversion and patented IP to enable smooth high/low/high beam transitions in a…

The STEVAL-NRG011TV board from STMicroelectronics helps designers quickly build 200W digital-power supplies and adapters for LED and OLED televisions to exceed the toughest energy-efficiency and standby regulations. Based on ST’s STNRG011 digital PFC (power-factor correction) and resonant LLC converter, the STEVAL-NRG011TV combines a proven and reliable topology with the ability to configure and fine-tune the operating parameters for optimal…

Melexis, a global microelectronics engineering company, has introduced the MLX81130, a highly integrated, intelligent controller allowing both LEDs and OLEDs to be driven by a single device. Designed to support ASIL B system integration, the MLX81130 in a QFN 5×5 package features 25 programmable constant-current sources. It has been designed to operate in single-master, multiple-slave…

Samsung Electronics announced a new partnership with CJ ENM, one of Asia’s top entertainment and media group (behind the Oscar-winning film, Parasite) to build a virtual production studio to spearhead the production of future video content. Combining its cutting-edge Micro LED technology with CJ ENM’s globally recognized content production of television series and films, Samsung is…

Samsung Electronics, a provider in advanced semiconductor technology, recently introduced ISOCELL Auto 4AC, an automotive image sensor that offers advanced 120-decibel (dB) high-dynamic range (HDR) and LED flicker mitigation (LFM). Particularly suited for surround-view monitors (SVM) or rear-view cameras (RVC) in high-definition resolution (1280 x 960), the new sensor is Samsung’s first imaging solution optimized…

Maxim Integrated Products, Inc. has introduced the four-channel, low-voltage MAX25512, automotive LED backlight driver with integrated boost converter. It’s the only integrated solution that retains full, constant brightness of in-car displays even during extreme cold crank conditions down to 3V input voltage. The single-chip LED driver eliminates an external MOSFET and current-sense resistor, integrating I2C…

STMicroelectronics’ ALED6000 single-chip automotive LED driver with integrated DC/DC converter is a low-BoM (Bill of Materials) solution that allows design flexibility and keeps the lighting intensity consistent as electrical conditions within the vehicle fluctuate. Suitable for exterior lighting such as daytime running lights, headlights, rear lights, stop lights, and turn signals, as well as interior lighting, the…

Diodes Incorporated has expanded its portfolio of devices supporting automotive exterior illumination with the introduction of the AL5873Q three-channel linear LED driver, targeted  at simplifying rear lamp cluster designs. Rated for 125° C ambient-temperature operation, this automotive-compliant, AEC-Q100 Grade 1 qualified device meets the demands of next generation vehicle design. It also providing energy and…

Introduction 1.1       GENERAL This chapter deals with the objective and unique features of the project and the organisation of the report.   1.2   OBJECTIVE The objective of the project work is to build an aid for physically challenged people to enable them operate normal daily life gadgets easily and conveniently using a voice recognition…

Light emitting diodes aligned in a form of matrix constitute a dot matrix display. It is commonly used to display time, temperature, news updates and many  more on digital billboards. Dot Matrix Display is manufactured in various dimensions like 5×7, 8×9, 128×16, 128×32 and  128×64 where the numbers represent LEDs in rows and columns, respectively.Arrangement of the LEDs in the matrix    pattern is made in either of the two ways: row anode-column cathode or row cathode-column anode.  In row anode-column cathode pattern, the entire row is anode while all columns serve as cathode and vice-versa pattern is there in row cathode-column anode. LED wafers are glued to the bottom of the segments and glow when powered ON. The  interesting part is that 35 LEDs are controlled by using a combination of 14 pins. Conductor tracks are laid all over the  board to power each LED. Let’s proceed to know in depth about how a dot matrix display works.  

This circuit will light up different LED’s according to the audio signals which are feed through condenser microphone. When sound intensity is low few LED’s will glow as intensity of sound increases number of LED’s which glow also increases. Important feature of this circuit is we have not use any special running light IC like LB1405. We have made this circuit with the help of seven channel Darlington array IC ULN2003. ULN2003 is a monolithic high voltage and current Darlington transistor array. It contains seven NPN Darlington pair on a single IC. It also have high output voltage with common cathode clamp diode for switching inductive load. And collector current rating of each Darlington pair is 500mA.  Another feature of ULN2003 IC it has 2.7kW series base resistor for each Darlington pair so that it can directly connected to TTL or 5V CMOS device. Read more to find out how this circuit is assembled and how it is made to work.