Circuits & Schematics Light - 10

This project is pretty cool for a few reasons, and driving a huge LED matrix with a single 8-bit controller is just one of them. The idea was born when I bought 120 LEDs of the wrong type, and decided to do something with them. With that many LEDs, ...

Subodh Johri and Prateek Johri, India EDN The H-bridge is a classic circuit used for driving dc motors in a user-defined manner, such as in forward/reverse direction or PWM-assisted controlled RPM with the help of four discrete/integrated switches ...

Application Note JN-AN-1166 Version 1.1 December 2013 This application note provides and describes a set of NXP software drivers for use with ‘smart lamps’. These software drivers are intended to be used in applications that run on ...

Tai-Shan Liao, National Applied Research Laboratories, Instrument Technology Research Center, Hsinchu, Taiwan EDN An excessive level of light from a laser pointer, even if only for a short duration, can be harmful if it enters the human eye either ...

Design Note DN05034/D November 2013 The NCL30051LEDGEVB LED driver evaluation board provides PWM dimming capability via gating the resonant half bridge converter on and off at the PWM rate. Effective minimum duty factor is about 10% being limited ...

Design Note DN05055/D October 2013 High voltage LEDs are becoming more popular and are now available from multiple LED manufacturers such as CREE and Philips-Lumileds. These package LEDs may have typical forward voltages ranging from 24 to 200 V. ...

Battery-operated equipment often will benefit from a power-on indicator. The indicator, however, can waste significant power. In situations where a low-duty-cycle blinking indicator provides an adequate indication of the power being turned on, the ...

You can use an LED as a photoelectric sensor. A previous Design Idea shows that such a switch is highly power-efficient, consuming almost no power ( Reference 1 ). However, you cannot adjust that configuration to switch at the desired light ...

Nora Jacalan Esteves, Technor Semiconductor LLC EDN With only a few additional components, you can use a highly efficient step-down dc/dc converter to create a constant-current, multiple-channel LED driver. It is relatively easy to drive a ...

This shield allows to connect an Arduino with DMX equipment (Figure 1). It implements the RS485 interface to adapt the electrical levels needed for DMX connection. This shield has been designed with flexibility in mind and allows the user to choose ...