|
Laser Diode Driver Stabilizes Sensitivity Parameters - 11/05/98 EDN-Design
Ideas:.....(design idea added 6/06) |
|
LED Driven Tail/Brake Light Cluster - LED driven tail/brake Light Cluster Constant
current circuitry 12V Battery operation (added 6/06) |
|
LED Driver Application for Portable Products See also DN23 - MicroNote 1312s from
Microsem (app note added 6/06) |
|
LED Driver Combines High Speed Precision - 08/21/03 EDN-Design Ideas: Applications
such as turbidity measurement and densitometry require cleanly pulsed light sources
with stable amplitudes. The LED driver in Figure 1 illuminates retinal neurons in a
biological experiment that has similar requirements. For a given LED at a given
current,.....(design idea added 1/05) |
|
LED Driver Delivers Constant Luminosity - 06/12/03 EDN-Design Ideas: The circuit
in Figure 1 is similar in principle to that of a previous Design Idea (Reference 1)but
offers improved, more reproducible performance. The output current is almost constant
over an input-voltage range of 1.2 to 1.5V and is insensitive to variations of
transistor gain. Transistors Q1 and Q2 form an astable flip-flop.....(design idea
added 12/04) |
|
LED Driver Displays Standing Wave Radio - 03/18/99 EDN-Design Ideas: The circuit
in Figure 1 uses an LM3914 LED driver to directly display standing-wave ratio (SWR)in
a low-cost, rugged instrument. The SWR-sensing head is derived from the ARRL Antenna
Handbookin an article that describes the tandem match. The forward voltage and
reflected voltage (VF+VR )signal drives Pin 6 (RHI ), and.....(design idea added 6/06) |
|
LED Driver Displays Standing Wave Ratio - 03/18/99 EDN-Design Ideas: PDF contains
multiple circuits scroll to find this circuit.....(design idea added 7/03) |
|
LED Driver Doubles as Fault Monitor - 08/05/04 EDN-Design Ideas: LEDs find wide
use as indicators and as light emitters in devices such as optocouplers. In some
applications, the LED or the emitter may be located remotely at some distance from the
main unit. Typical examples are dashboard-mounted automotive indicators and industrial
optosensors. In critical applications, you may require some means of monitoring the
integrity of the LED.....(design idea added 11/05) |
|
LED driver lights three LED strings & provides constant voltage supply -
Typical uses today include backlighting for LCD TVs, projectors, computer displays,
camera flashes, and vehicle brake lights. All need constant-current LED drivers that
are economical and offer high dimming ratio, high efficiency, and precise adjustable
current. To save space, some LED drivers are designed to light multiple strings of
LEDs.... (circuit added 08/08/08) |
|
LED Driver Provides Oscillator for MicroController - 09/16/04 EDN-Design Ideas:
The major building blocks for a white-LED driver are an oscillator, a charge pump, and
a regulated current source. National Semiconductor (www.national.com )produces a
device that contains all these building blocks in the highly integrated LM2791/2 IC.
You usually use white-LED drivers in tandem with cellular baseband controllers or
microcontrollers.....(design idea added 11/05) |
|
LED Driver provides software Controlled intensity - 09/30/04 EDN-Design Ideas:
Recent advances in operating efficiency have expanded the use of LEDs from one of mere
indicators to becoming driving forces in electronic lighting. Increased reliability
and ruggedness (versus other lighting technologies)gives the LED a bright future
indeed. Vendors in recent years have introduced many ICs for driving LEDs, but the
problem of driving serial chains of LEDs has received less at.....(design idea added
10/05) |
|
LED drivers minimize power dissipation - 02/01/07 EDN-Design Ideas: Reference
source and pullup resistor improve efficiency.....(design idea added 3/07) |
|
LED senses & displays ambient light intensity (video) - (Video Design Ideas- EDN,
09/05/07) -- Dhananjay V Gadre of India's Netaji Subhas Institute of Technology
explains how an LED can double as a photosensor and a visual indicator of
ambient-light intensity. (electronic design idea added 09/08) |
|
Level Shifter Follows Negative Output - 11/23/94 EDN-Design Ideas: 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.....(design idea added 3/03) |
|
Limiting Amplifier Makes Efficient A/D Converter Driver - 09/02/96 EDN-Design
Ideas: 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 the specified
range. In addition.....(design idea added 04/03/02) |
|
LIN 2.0 Compliant Driver using the PIC18XXXX Family MicroControllers - Microchip
Application Note Published 27-Oct-05 (app note added 6/06) |
|
Line Driver Economically Synthesizes Impedance - 01/06/94 EDN-Design Ideas: 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 amp's.....(design
idea added 06/06/06) |
|
Line Driving & System Design - National Semiconductor Application Note (app
note added 2/06) |
|
Line powered driver lights up high power LEDs - 06/08/06 EDN-Design Ideas: (design
idea added 05/07) |
|
Linear brightness Controller for LEDs has 64 taps - 03/15/07 EDN-Design Ideas:
Digital potentiometer controls the brightness of LEDs.....(design idea added 6/07) |
|
LM3916N bar graph driver - Datasheet in pdf format, drives a 10 LED bar graph with
VU proportions (3db/step)... (app note added 7/06) |
|
Low Cost Converter Drives Fluorescent Tubes - 03/31/94 EDN-Design Ideas: In the
last few months, several designers have published circuits for cold-cathode
fluorescent-tube (CCFT)power supplies, and a specialized power-supply IC is also now
available. However, a significant number of CCFT applications don't require the
complexity and expense of a dual-FET resonant.....(design idea added 6/06) |
|
Low Power RS-232C Driver & Receiver in CMOS - National Semiconductor Application
Note 05 Oct1998 / (app note added 5/02) |
|
Low Voltage Latching Relay Driver - Using some small super capacitors, this
circuit can latch and unlatch a mechanical relay with 10 amp contacts, from a small 3
volt power source. By using a latching relay, power can be controlled to a load
with a tiny battery. (added 7/06) ….(designed by David A. Johnson) |
|
LX1686 Backlight CCFL Direct Drive Design Reference AN-13 - Application Note 13
from Microsem (app note added 6/06) |
|
LX1995 LED Driver: Camera Flash Application AN-30 - Application Note 30 from
Microsem (app note added 6/06) |
|
Medium Power 40kHz Ultrasound Transducer Driver - This crystal controlled circuit
drives a 40KHz piezoelectric transducer with a 30v peak to peak signal. (added
7/06) ….(designed by David A. Johnson) |
|
MicroController converts Digital temperature Sensor readings without floating point
arithmetic - 03/05/09 EDN-Design Ideas: , Convert
digital-temperature-sensor readings without floating-point arithmetic.....(design idea
added 08/09) |
|
MicroController drives H bridge to power a permanent magnet DC motor - 03/15/07
EDN-Design Ideas: Improved H-bridge requires only two driver signals.....(design idea
added4/07) |
|
MicroController drives LCD with just one wire - 12/03/07 EDN-Design Ideas: A
Microchip PIC10F family microcontroller sparks an HD44780 LCD using a single I/O pin.
|
|
MicroController drives logarithmic/linear dot/bar 20 LED display - 01/18/07 EDN-Design
Ideas: Do-it-yourself analog-to-LM3914 display driver offers user programmability.
(schematic.....(design idea added 6/07) |
|
MicroController functions as voltmeter - 05/10/07 EDN-Design Ideas: PIC
microcontroller and FETs enable a four-digit voltmeter.....(design idea added 06/07)
|
|
MicroController JFET form low cost two Digit millivoltmeter - 06/22/06 EDN-Design
Ideas: Software subroutines replace hardware A/D converter.....(design idea added
6/07) |
|
MicroController provides low cost analog to Digital Conversion drives seven segment
displays - 05/10/07 EDN-Design Ideas: Versatile conversion circuit detects and
displays signal's peak value.....(design idea added 06/07) |
|
MicroController's single I/O Port line drives a bar graph display - 06/07/06 EDN-Design
Ideas: Bar-graph display spares processor I/O lines.....(design idea added 6/07) |
|
Micropower High-Side MOSFET Drivers - AN53 Linear Technology This application note
describes the operation of high-side Nchannel MOSFET switch drivers designed
specifically for operation in battery-powered equipment, such as notebook and palmtop
computers and portable medical instruments. A selection ....(appnote added 6/06) |
|
MOSFET Serves as Ultrafast plate Driver - 10/03/02 EDN-Design Ideas: The circuit
in Figure 1 provides a 20-MHz square wave across a set of highly capacitive
ion-deflection plates in an experimental instrument. To get the required deflection,
the plate voltage must be 20 to 30V, much higher voltage than conventional logic or
driver families can provide.....(design idea added 1/05) |
|
Motor driver-74*245-based - A simple, time-honored approach is to use one or more
74*245 chips (normally 74AC245 is used for maximum current capability) to
provide motor drive current. Here, each channel of drive power is provided by one or
more buffer on chip. (added 1/07) |
|
Multiple Relay Drive - Circuit Ideas for Designers Application Notes Advanced
Linear Devices, Inc. (app note added 6/06) |
|
Muscle power drives battery free electronics - 11/21/05 EDN-Design Ideas: Your
sweat and a super-cap replace the battery.....(design idea added 05/07) |
|
MXP400x Wire Bond - MicroNote 1601 from Microsem (app note added 6/06) |
|
N-CH & P-CH Transistor form Push-Pull Driver - This circuit can produce high speed
output signals with fast rise and full times. The unique change pump ….(designed by
David A. Johnson) |
|
New CMOS Vacuum Fluorescent Drivers Enable Three Chip System to Provide Intelligent
Control of Dot Matrix VF Display - National Semiconductor Application Note
(app note added 2/06) |
|
Novel Process for Vacuum Fluorescent VF Display Drivers - National
Semiconductor Application Note (app note added 6/06) |
