Data-Acquisition System Is Cheap & Simple -  12/31/69  EDN-Design Ideas The most important criteria of a data-acquisition system for college science laboratories are simplicity and price rather than precision or speed.  The data-acquisition system in Figure 1 offers adequate precision of less than 0.5% and speed of 1 Hz to rep Design by Tom Lyons Fisher, Juniata College, Huntingdon, PA

DC Motor Driver with L6203 -  The L6203 is a DMOS full bridge driver, which can handle the high peak current up to 5A and supply voltage up to 48V with RDS  (ON) of just 0.3 ohm.  The chip can run the DC motor at 4A continuous with proper heat sinking.  The above DC motor driver circuit is implemented with L6203 chip accompanied by a L6205 current controller.  The current controller is used in this circuit as a pair of latching comparators.  When the current through the motor reaches __ Designed by www.wzmicro.com

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 __ Designed by dave @ NO_SPAM_digisound80.co.uk 

Digital Clock with Timer & Solar Panel Regulator -  This is a combination digital clock timer and solar panel charge controller used to maintain a deep cycle battery from a solar panel.  The timer output is used to control a 12 volt load for a 32 minute time interval each day.  Start time is set using 9 dip switches and ends 32 minutes later. __ Designed by Bill Bowden

Digital LED Clock & Timer -  This is a combination digital clock timer and solar panel charge controller used to maintain a deep cycle battery from a solar panel.  The timer output is used to control a 12 volt load for a 32 minute time interval each day.  Start time is set using 9 dip switches and ends 32 minutes later. __ Designed by Bill Bowden

Digital pot adjusts LCD's contrast -  02/04/99 EDN-Design Ideas NOTE : Page includes several designs.  Scroll to find this one.  You can use a digitally controlled potentiometer for many purposes.  In this example, you can use the device to regulate the contrast of a standard (such as two lines by 40 characters] LCD.  You can use the circuit in Figure 1 in a portable test system, in which you need to change the contrast of the LCD as a function of the viewing angle.  You choose the contrast setup Design by Jef Collin, CSE Systems, Turnhout, Belgium

Digital Potentiometer Controls LCD Bias -  03/17/94 EDN-Design Ideas Designers of pen-based computers can easily relegate some controls that were previously mechanical, such as switches and potentiometers, to on-screen icons.  For example, the circuit in Fig 1 shows one way that digital logic can control the -24V-dc LCD bias using two general-purpose I/O command lines.  The DS-1669 from Dallas Semiconductor Design by Michael Cortopassi, Dauphin Technology, Lombard, IL

Discrete component buck converter drives HB LEDs -  03/05/09  EDN-Design Ideas With just a few components, you can provide sufficient power to operate a high-brightness LED from a battery Design by Dhananjay V Gadre, Netaji Subhas Institute of Technology, New Delhi, India

Display bit-map images on small-graphic LCDs -  11/19/98 EDN-Design Ideas NOTE :  File contain several designs.  Scroll to find this one.  Combining a high-level language, such as Microsoft Windows, with low-level assembly code or C++ code allows you to display perfect bit-map pictures on your small-graphic LCD screen.  You can use Microsoft Paint or any other bit-map-generating program to define and edit the picture.  Unlike segmented and alphanumeric LCDs, small-graphic LCDs are fully graphical and can display logos, graphs, or any other image in addition to numbers and characters.  The main hurdle to upgrading to this type of display is the software necessary to display the bit-map pictures. Design by Todd Fitzsimmons, Densitron Corp, Santa Fe Springs, CA

DisplayTech LCD interface -  Low cost LCD module interface with optional LED backlight __ Designed by Michel Bavin

Double the protection of a laser driver using a 1V power supply -  04/09/13 EDN-Design Ideas Drive a laser pointer with a single cell discharged to as low as 1V, and improve safety reliability with redundant current control transistors.   Design by liao taishan

Drive 9V Solenoids from 3V Battery -  08/17/95 EDN-Design Ideas 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 the fact that solenoids like being actuated by capacitive discharge at much higher levels than their nominal voltage.  This mode of operation results in a good, crisp response by the solenoid plunger.    Design by Craig Varga, Linear Technology Corp, Milpitas, CA

Drive a Complementary Output Stage & 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.   __ Contact: Charles Wenzel of Wenzel Associates, Inc.

Drive a single coil latching relay without an H-bridge -  03/05/09  EDN-Design Ideas Drive current in both directions to cut power consumption Design by Carlos Cossio, Santander, Spain

Drive inductive loads -  05/25/00 EDN-Design Ideas In the driver circuit in Figure 1 , the system controller provIdeas 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, applying voltage to the gates of Q 1 and Q 2 .  These transistors turn on, allowing load current to flow to ground through Q 1 and R 8 Design by Carlisle Dolland, Honeywell Engines and Systems, Torrance, CA

Drive Single-Coil Latching Relays -  11/13/08  EDN-Design Ideas Five driver circuits operate single-coil latching relays Design by Alfredo H Saab and Tina Alikahi, Maxim Integrated Products, Sunnyvale, CA

Drive two relays via one wire -  This is a very simple circuit which will drive either of two relays via one wire.  Apply supply voltage to the control wire and one relay operates.  Apply zero volts to the wire and the other relay operates.   __ Designed by Richard Torrens

Driver for 14-bit, 4.5 MSPS ADC operates over a wide gain range -  EDN-Design Ideas 05/28/2015    LTC Design Notes:  Assure optimum performance by matching up ADC and input driver Design by LTC Design Note

Driver for CCD Imager & an OLED Display Panel with Soft Start -  The three outputs of the LT3587 can be configured to provide positive  (+15V AT 50mA) and negative  (-8V AT 100mA) bias for a CCD imager as well as 16V AT 20mA to bias an OLED display __ Linear Technology/Analog Devices App Note, Mar 24, 2010

Drive™ ADCs Simplify Measurement of High Impedance Sensors -  DN379 Design Notes__ Linear Technology/Analog Devices

Driving & protecting inverter IGBTs -  EDN-Design Ideas 06/12/2014     A special purpose optocoupler can solve your IGBT gate-drive and fault-feedback needs Design by Avago Tech Note

Driving a Capacitive LoA - D -  You've been warned! Do not attempt to drive large capacitances with your op amp, severe overshoot and ringing may occur.  But what if you're stuck driving a length of coax cable that's unterminated? You could end up with over 1000 pF that sends the output ringing.  What causes this behavior? Unfortunately  (spice design) 

Driving a Relay -  The 555 will activate a relay.  When pins 2 and 6 are connected as an input, the chip requires only about 1uA to activate the output.  This is equivalent to a gain of about 200, 000, 000  (200 million) and represents about 4 stages of amplification via transistors__ 555-Timer

Driving an LCD From the Parallel Port -  You build the module, then use the software to display messages of to program a thermometer/thermostat chip.__ SiliconChip

Driving an LED with or Without a Resistor -  In this post I will try to show, why it's a good idea to use a current limiting resistor for an LED.  And when it's save to drive the LED without any resistor.  If you read about LEDs, you will notice that everyone tells you, that you need a current __ Designed by Radio LocMan

Driving Bipolar Stepper Motors -  Stepper motors are devices, which convert electrical impulses into discrete mechanical rotational movements.  In a typical stepper motor, power is applied to two coils.  Two stator cups formed around each of these coils,  __ Designed by Seiichi Inoue

Driving out complexity with abstraction tools -  06/24/04 EDN-Design Ideas Complexity is relative.  It can prevent you from solving a problem if you can't characterize and understand the problem within a specific context.  At the same time, it provIdeas an opportunity to differentiate your product offering Design by Robert Cravotta, Technical Editor-EDN

Dual Bridge Driver On Expansion Module with L293p for Arduino -  The short article describes simple but useful four channel driver expansion module with L293P for Arduino. The board can be called power shield, motor shield or driver shield because gives the possibilities...__ Designed by Petre Tzv. Petrov, Sofia, Bulgaria

Dual Monostable Drives Quasiresonant Inverter -  02/17/97 EDN-Design Ideas A zero-voltage-switching  (ZVS) controller usually integrates a one-shot circuit, embodied in a VCO system.  An error amplifier monitors the output voltage and adjusts the VCO's off-time to keep the output value at a constant level.  Each on-time period commences as soon as the primary voltage drops to zero, thus eliminating on/off commutation losses associated with the switching element Design by Christophe Basso, Sinard, France

Dual Relay Driver Board -  We have used two Goodsky RWH-SH-112D 12V relays, coil resistance 400 ohm.  It is rated to switch 250VAC at 12A.  However, because of the PCB track thickness and width we do not recommend using the
relay to switch more than 5A.  If you.   __ Contact: IQ Technologies

Dual-Coil Relay Driver Uses Only Two MOSFETs -  22-Oct-09 EDN-Design Ideas Differentially drive relays to minimize power consumption Design by Mehmet Efe Ozbek, PhD, Atilim University, Ankara, Turkey

DVI/HDMI Decoder -  From the day i received my beagleboard rev.  B7 i was missing an easy way to use the digital video interface with a small LCD screen.  Many people seem to have the same problem and often end up with big and expensive adaptors.  Further indication that this is a common problem comes from the fact that the latest incarnation of the beagleboard includes a way to directly interface to the OMAPs parallel video interface.  Unfortunatately this only provides 1.8v signals and still needs a converter to interface to the 3.3v signals most raw LCD use. __ Designed by Till Harbaum <Till @ Harbaum.org>

Easily display bit-map images on small-graphic LCDs -  11/19/98 EDN-Design Ideas NOTE :  File contain several designs.  Scroll to find this one.  Combining a high-level language, such as Microsoft Windows, with low-level assembly code or C++ code allows you to display perfect bit-map pictures on your small-graphic LCD screen.  You can use Microsoft Paint or any other bit-map-generating program to define and edit the picture.  Unlike segmented and alphanumeric LCDs, small-graphic LCDs are fully graphical and can display logos, graphs, or any other image in addition to numbers and characters.  The main hurdle to upgrading to this type of display is the software necessary to display the bit-map pictures. Design by Todd Fitzsimmons, Densitron Corp, Santa Fe Springs, CA

Easy Drive™ ADCs Simplify Measurement of High Impedance Sensors -  DN379 Design Notes__ Linear Technology/Analog Devices

EE 491 Senior Project Digital Oscilloscope Cornell University 2000 -  My senior project is to design and build a digital oscilloscope for Professor Land.  This project involves a number of design challenges.  On the analog side, I need a fast, low noise A/D converter.  In addition, the circuit requires a -20V bias from a 5V supply.  In the realm of digital, it involves interfacing two micro-controllers with each other, an LCD display, and an analog to digital converter.  With such a broad range of challenges, I searched for help from my professors and contacts I made on the web.  I was successful in getting __ Designed by Reid Gurnee

Efficient 5v Relay Driver -  This design idea outlines a method to use an analogue switch and discrete components to reduce the power dissipated in relay actuation.  Presented here is an MAX4624-based circuit to drive a...__ Electronics Projects for You

Embedded Processor Directly Drives LCD -  01/09/03 EDN-Design Ideas Driving a bare LCD does not necessarily require specialized interface circuitry or peripherals.  This design idea describes an alternative drive scheme, which you can easily implement using the general-purpose outputs of a microcontroller.  Many embedded-system applications need to interact with a user by displaying simple numeric or alphanumeric characters Design by Daniel Malik, Motorola, Czech Republic

Excel offers painless LCD initialization -  09/20/01  EDN-Design Ideas To display a font or a symbol on an LCD, you need to convert the desired character into numerical data.  Creating the data for an entire font set requires specialized tools; even with these tools, the task can be daunting.  Alternati Design by Alberto Bitti, Eptar, Lugo, Italy