Level Shifter follows Negative Output  -  11/23/94 EDN Design Idea   Transistors Q1 and Q2 in Fig 1, develop a feedback signal of the proper positive polarity for regulator IC1 from the circuit's negative output. You can use this simple technique to sense any negative-voltage output. The regulator drives a charge pump comprising. . .  [by Dimitry Goder, Linear Technology Corp, Milpitas, CA]

Lighthouse LED Flasher  -  This was originally designed for a model in a HO train set. It simulates the behavior of the light from a lighthouse. The LED intensity gradually increases, then flashes with a bright light and finally decreases slowly in intensity . . . [Circuit by Dave Johnson P.E.,  07/11/06]

Limiting Amplifier Makes Efficient A/D-Converter Drive  -  09/02/96 EDN Design Idea    Limiting Amplifiers are useful for protecting circuitry that has a limited input range. A classic example is an input buffer for an A/D converter. Many A/D converters are susceptible to damage if the input significantly exceeds . . .  [by Mark Amarandos, Harris Semiconductor, Costa Mesa, CA]

LIN 2.0 Compliant Driver Using the PIC16FXXX Family Microcontrollers  -  AN1099 - Technology Inc. . . .  [Microchip App Note - last updated on 6-Apr-11]

LIN 2.0 Compliant Driver Using the PIC18XXXX Family Microcontrollers  -  AN1009 - Technology Inc. . . .  [Microchip App Note - last updated on 26-Apr-11]

Line Driver Economically Synthesizes Impedance  -  01/06/94  EDN Design Idea   The line-driver circuit in Fig 1 uses a second op amp to synthesize the output impedance. The conventional line-driver circuit employs a single op Amp having a resistor whose resistance is equal to the desired impedance in series with the op Amps. . .  [by Victor Koren, Orckit Communication Ltd, Ramat-Gan, Israel]

Line Driving & System Design  -  Application Note. . .  [National Semiconductor]

Line Powered High Intensity LED Flasher  -  There are times when you would like to generate an intensely bright flash of light using electrical power from the AC line. The circuit below can drive a one to three watt power LED with about 350ma of peak current. Since the circuit drives the LED with . . . [Hobby Circuit designed by Dave Johnson P.E.,  12/07/08]

Line Powered White LED Array  -  There has been a lot of excitement lately in the lighting industry. Some companies are beginning to manufacture general lighting fixtures, which replace incandescent and fluorescent lamps, using LED lights. When proper heat management is designed . . . [Circuit by Dave Johnson P.E.,  02/28/10]

Line Status Indicator for 1 Telephone Line  -  This circuit monitors one phone line . . . [Hobby Circuit designed by David A. Johnson P.E.,  06/10/00]

Linear-brightness controller for LEDs has 64 taps  -  03/15/07  EDN Design Idea   Digital potentiometer controls the brightness of LEDs. . .  [by Ahmad Ayar, Maxim Integrated Products, Sunnyvale, CA]

Line-powered driver lights up high-power LEDs  -  06/08/06  EDN Design Idea   LED array reduces power and maintenance expenses. . .  [by Aaron Lager, Masterwork Electronics, Rohnert Park, CA]

LM143 Monolithic High Voltage Operational Amplifier Applications  -  LED lighting designers are challenged with meeting their efficiency and reliability goals faster in advanced LED lighting designs. LED lighting customers seeking the latest in innovative and affordable LED lighting solutions can benefit from TI's broad product portfolio of LED drivers, AC/DC, DC/DC, power management devices, wireless and wired interface control and embedded processors. LED designers have the option of not only controlling the power stage, but regulating LED currents as well, eliminating the need for multiple components and reducing system cost. . . .  [Texas Instruments App Notes, 2-May-04]

LM2755 Charge Pump LED Controller with I2C Compatible Interface in SMD (Rev. A)  -  LED lighting designers are challenged with meeting their efficiency and reliability goals faster in advanced LED lighting designs. LED lighting customers seeking the latest in innovative and affordable LED lighting solutions can benefit from TI's broad product portfolio of LED drivers, AC/DC, DC/DC, power management devices, wireless and wired interface control and embedded processors. LED designers have the option of not only controlling the power stage, but regulating LED currents as well, eliminating the need for multiple components and reducing system cost. . . .  [Texas Instruments App Notes, 30-Apr-13]

LM2756 Multi-Display Inductorless LED Driver w/32 Exp Dimming Steps in SMD (Rev. A)  -  LED lighting designers are challenged with meeting their efficiency and reliability goals faster in advanced LED lighting designs. LED lighting customers seeking the latest in innovative and affordable LED lighting solutions can benefit from TI's broad product portfolio of LED drivers, AC/DC, DC/DC, power management devices, wireless and wired interface control and embedded processors. LED designers have the option of not only controlling the power stage, but regulating LED currents as well, eliminating the need for multiple components and reducing system cost. . . .  [Texas Instruments App Notes, 30-Apr-13]

LM27961-Dual-Display White LED Drvr w/3/2x Switched Cap Boost (Rev. A)  -  LED lighting designers are challenged with meeting their efficiency and reliability goals faster in advanced LED lighting designs. LED lighting customers seeking the latest in innovative and affordable LED lighting solutions can benefit from TI's broad product portfolio of LED drivers, AC/DC, DC/DC, power management devices, wireless and wired interface control and embedded processors. LED designers have the option of not only controlling the power stage, but regulating LED currents as well, eliminating the need for multiple components and reducing system cost. . . .  [Texas Instruments App Notes, 30-Apr-13]

LM27965 Dual Display White LED Driver w/I2C Compatible Brightness Control (Rev. B)  -  LED lighting designers are challenged with meeting their efficiency and reliability goals faster in advanced LED lighting designs. LED lighting customers seeking the latest in innovative and affordable LED lighting solutions can benefit from TI's broad product portfolio of LED drivers, AC/DC, DC/DC, power management devices, wireless and wired interface control and embedded processors. LED designers have the option of not only controlling the power stage, but regulating LED currents as well, eliminating the need for multiple components and reducing system cost. . . .  [Texas Instruments App Notes, 30-Apr-13]

LM3553 1.2A Dual Flash LED Driver System with I2C Compatible Interface (Rev. B)  -  LED lighting designers are challenged with meeting their efficiency and reliability goals faster in advanced LED lighting designs. LED lighting customers seeking the latest in innovative and affordable LED lighting solutions can benefit from TI's broad product portfolio of LED drivers, AC/DC, DC/DC, power management devices, wireless and wired interface control and embedded processors. LED designers have the option of not only controlling the power stage, but regulating LED currents as well, eliminating the need for multiple components and reducing system cost. . . .  [Texas Instruments App Notes, 30-Apr-13]

LM3916 Dot/Bar Display Driver  -  The LM3916 is a monolithic integrated circuit that 2 senses analog voltage levels and drives ten LEDs, LCDs, or Vacuum Fluorescents LCDs or vacuum fluorescent displays, providing an electronic version of the popular VU meter. One pin by User changes the display from a bar graph to a moving dot display. . .  [SNVS762B – JANUARY 2000 – REVISED MARCH 2013]

LM3916N bar graph driver  -  Datasheet in PDF format, drives a 10 LED bar graph with VU proportions (3db/step). . .  [National Semiconductor]

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