DCC Zero Stretching Simulator
(LM555) - This circuit is designed to simulate the 'Zero
Stretching' function of Digital Command Control systems used by model railroads. This circuit was used drive the
booster while testing the operation of block occupancy detectors and DCC signal failure circuits while in the
zero stretching mode. . . [from Rob Paisley's Model Train web site]
Deliver Dimming Control for White-LED Driver
- 10/28/04 EDN Design Idea The demand for power in color cell-phone handsets
is constantly increasing. New applications steadily emerge, making it imperative to reduce power consumption in
the design. Examination of usage data shows that than 50% of the power. . . [by Wallace Ly, National
Semiconductor, Santa Clara, CA]
Design & Program Examples for Lighting MGMT Unit LP5526 (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]
Design Notes: 60V, Synchronous Step-Down High Current LED Driver
- 03/01/14 EDN Design Note This circuit provides much better performance
and higher power handling than a Zener diode The meaning of the term “high power LED” is rapidly evolving.
Although a 350mA LED could easily earn the stamp of “high power” a few years ago, it could not hold a candle to
the 20A LEDs or the 40A laser diodes of today. High power LEDs are now used in DLP projectors, surgical
equipment, stage lighting, automotive lighting, and other applications traditionally served by high intensity
bulbs. . . [by Hua (Walker) Bai, also see Linear Technology Design Note 508]
Design Notes: LT3791 Buck-Boost Controller Drives High-Power LEDs, Charges
High-Voltage Batteries - 08/29/13 EDN Design Note The
LT®3791 is a 4-switch synchronous buck-boost DC/DC converter that regulates both constant-current and
constant-voltage at up to 98. 5% efficiency with a single inductor. It can deliver hundreds of watts and features
a 60V input and output rating, making it ideal for driving high power LED strings and charging high voltage
batteries when both step-up and step-down conversion is needed. It can also be used as a constant voltage
buck-boost regulator with current limiting and monitoring for both input and output. . . [by Keith Szolusha,
Linear Technology Corporation, Design Note 501]
Designing Energy-Efficient Handheld Illum Solutions (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]
Determining MOSFET Driver Needs for Motor Drive Applications
- Application Note Published 31-Dec-03. . . [Microchip]
Differential Amp drives high-speed ADC
- 06/21/01 EDN Design Idea The schematic in Figure 1 is the discrete-element
version of an A/D-converter drive circuit. The circuit converts a single-ended input to a differential output.
The ADC's reference voltage determines the common-mode range of the differential outputs. The circuit contains
two AD9631 Amplifiers—one connected in noninverting mode, and the other connected in inverting mode. The OP279
amplifiers buffer and scale the ADC's reference voltage to set the common-mode range of the two outputs. . . [by
Chau Tran]
Differential driver doubles as versatile RF-switch driver
- 01/06/05 EDN Design Idea Designed as a high-speed driver for 12-bit
ADCs, the AD8137 controls SPDT GaAs (gallium-arsenide] FET-MMIC (microwave-monolithic-IC] and PIN-diode RF
switches and thus provides a low-cost and versatile alternative to conventional switch. . . [by John Ardizzoni,
Analog Devices, Wilmington, MA]
Digisound ring modulator
- Dual Ring Modulator based on MC1496. The X and Y inputs are AC
coupled and are capable of accepting 10V p-p signals. Comprises two totally independent ring modulators on the
same PCB which produces the sum and difference with two input signals. Ideal for the production of a whole range
of sounds including bell and gong sounds. . .
Dimming Techniques for Switched-Mode LED Drivers - 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-Jul-09]
Discrete component buck converter drives HB LEDs
- 03/05/09 EDN Design Idea With just a few components, you can provide
sufficient power to operate a high-brightness LED from a battery. . . [by Dhananjay V Gadre, Netaji Subhas
Institute of Technology, New Delhi, India]
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]
Double the protection of a laser driver using a 1V power supply
- 04/09/13 EDN Design Idea Drive a laser pointer with a single cell
discharged to as low as 1V, and improve safety reliability with redundant current control transistors. . . [by
liao taishan]
Drive 12 LEDs With One I/O Line - 02/04/10 EDN Design
Idea Use a binary counter to generate LED-lighting codes. . . [by Charaf Laissoub, Maisons Alfort, France]
Drive 16 LEDs With One I/O Line - 06/09/11 EDN Design
Idea Over the last few years, several Design Idea have described how to use just a few microcontroller I/O
pins to drive many LEDs (references 1 through 7). The circuit in Figure 1 can drive 16 LEDs with just one pin and
two shift registers. You can use the c. . . [by Zoran Mijanovic and Nedjeljko Lekic, University of Montenegro,
Podgorica, Montenegro]
Drive 9V Solenoids from 3V Battery
- 08/17/95 EDN Design Idea At times, it may be necessary to power a
solenoid-type pulsed actuator from a low-voltage battery in portable equipment. The circuit in Fig 1 accomplishes
this task using a standby current of 10 µA. The design takes advantage of . . . [by Craig Varga, Linear
Technology Corp, Milpitas, CA]
Drive a blue LED from a 3V battery - 02/15/07 EDN Design
Idea Two 1. 5V cells and a few components can light a blue LED. . . [by Sergi Sánchez, Federal Signal Vama
SA, Vilassar de Dalt, Spain]
Drive a Complementary Output Stage and
Step-Up Audio Transformer - File contains several
designs, please scroll to find this circuit. T he following circuit uses the flasher circuit to drive a
complementary output stage and step-up audio transformer. This circuit is used in a high voltage breakdown tester
but it would be useful for a variety of applications. . . . [Charles Wenzel (unless otherwise noted)]
Drive a LED with an
Intensity Ramping Mode - The circuit below was
designed to drive a LED with an intensity ramping mode. Two 555 timers generate two different triangle waveforms.
The upper device generates a 10KHz signal while the lower unit produces a 1Hz signal. The two signals are fed to
a . . . [Hobby Circuit designed by Dave Johnson P.E., 12/21/07]
Drive a single coil latching relay without an H-bridge circuit
- 03/05/09 EDN Design Idea Drive current in both directions to cut power
consumption. . . [by Carlos Cossio, Santander, Spain]
Drive High Intensity White LEDs Efficiently using the PIC16C781
- Application Note Published 17-Jul-02. . . [Microchip]
Drive inductive loads - 05/25/00 EDN Design Idea In the
driver circuit in Figure 1 , the system controller provides the V COMMAND signal. V COMMAND equals the desired
load current multiplied by R 8. When the controller applies this voltage to R 1 , the output of IC 1 goes high. .
. [by Carlisle Dolland, Honeywell Engines and Systems, Torrance, CA]
Drive latching relays -
02/01/96 EDN Design Idea Figure 1 shows a low-parts-count circuit that can drive one- or two-coil latching
relays. Latching relays are useful in sensitive analog designs. The 74ACT174 hex flip-flop has Ample capability
to drive the Aromat TQ2E series of . . . [by Roy McCammon, 3M Austin, TX]
Drive LCD With Just One Wire
- 12/03/07 EDN Design Idea A Microchip PIC10F family microcontroller sparks an HD44780 LCD using a single
I/O pin. . . [by Noureddine Benabadji, University of Sciences and Technology, Oran, Algeria]
Drive mixed types and quantities of LEDs
- 10/03/02 EDN Design Idea Portable systems often use LEDs of different
colors and in varying quantities of each color. Some examples are white for the display backlight, green for
keypad illumination, and red for power. Typically, the LEDs derive power from . . . [by Mark Pearson, Maxim
Integrated Products, Sunnyvale, CA]
Drive Single-Coil Latching Relays - 11/13/08 EDN Design
Idea Five driver circuits operate single-coil latching relays. . . [by Alfredo H Saab and Tina Alikahi, Maxim
Integrated Products, Sunnyvale, CA]
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