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Flyback Transformer Driver - This is by far the best project for someone who is already familiar with High Voltage, but wants to take their experiments to the next level: It requires very little previous experience and skills with soldering and identifying components, and there are virtually no adjustments to be made. The danger is minimal, as fly back transformers are intrinsically low power devices, not capable of outputting lethal currents (due to the hair-thin secondary windings) , and yet it will give a careless experimenter a nasty RF burn if he accidentally touches the HV wire (nothing beats learning from your mistakes) . If you have never experimented with HV before though, I recommend you start off with an electrostatic project. This circuit is not a toy! __ Contact: Sam Barros
Forcible latch module - This is set-reset latch: it is a 'personality module for 4QD-TEC transistorised relay system. However it is an R-S latch with a difference in that it can be set by a High or a Low signal (as appropriate) on either input. The latch can be forced eithr way, and stays that way until next changed. __ Designed by Richard Torrens
Form Push-Pull Driver using N-Ch & P-Ch Transistors - This circuit can produce high speed output signals with fast rise and full times. The unique change pump action allows the voltage of the upper P-ch device to range from millivolts to hundreds of volts. The output current is only limited by the rating of . . . Hobby Circuit designed by Dave Johnson P.E.-June, 2000
Fourth Generation of LCD Backlight Technology - AN65 Linear Technology This publication, LTC's fourth effort devoted to LCD backlighting in as many years, treatssubject comprehensively. The text considers lamps, display and layout induced losses, circuitry, efficiency related issues, optimization and measurement techniques. Twelve appended sections cover lamp types, mechanical design, electrical and photometric measurement, layout, circuitry and related topics. __ Linear Technology/Analog Devices
Full Bridge Transistor Motor Driver - a nifty little circuit that monitors the battery voltage as it gets charged __ Contact: P. Townshend EduTek Ltd
Full Bridge MOSFET Motor Driver - an ingenious design that prevents shoot through, ideal for PWM/robotics / radio control __ Contact: P. Townshend EduTek Ltd
Glow Plug Controller - In diesel engines, the air in the cylinders is not hot enough to ignite the fuel under cold conditions. Therefore each cylinder of these engines is fitted with an electric heater...__ Electronics Projects for You
Glowplug Driver for Powered Models - Simple circuit lets you start model engines from a 12V car battery.__ SiliconChip
Glowplug Driver for Radio Control - An on/off switch is not required for the glowplug driver since it only draws current when a glowplug is attached. As a matter of fact, the circuit is only powered (via Q1) via a connected glowplug. Just in case you were wondering how the positive (+) side of the circuit is connected. The starter motor runs directly from the flight box battery, via the jacks on the power-panel, and has it's own on/off switch. Same scenario for the fuel pump, but includes a reverse switch to pump the fuel in or out the tank/cannister __ Designed by Tony van Roon VA3AVR
Glowplug Panel - Combine it with the Glowplug Driver __ Designed by Tony van Roon VA3AVR
GPS Driver Module for the 6-Digit Clock, Pt 2 - Based on the GlobalSat EM-408 GPS module, this compact GPS receiver/driver board mates with the 6-digit display described in Pt.1 to form a self-contained GPS clock. It can also be housed separately and used to provide NMEA 0183 time and date information to a PC, via a serial port.__ SiliconChip
GPS LCD Display Project - This is a project that I started back late 2003 when I just starting to learn PIC programming. I wanted to building something that actually did somthing useful. This project is based on a PIC16F84. I actually came up with this idea and then after doing some searching I found that a few people had the same idea. But, I wanted to build my own that I could call mine, developed by me. The whole idea is, I have several GPS units with no display __ Designed by Jason KE4NYV from Roanoke, Virginia
H-Bridge - This circuit drives a motor clockwise / anticlockwise via a 10k to 100k pot. __ 555-Timer
H-Bridge drives DC Motors - This circuit drives small DC motors up to about 100 watts or 5 amps or 40 volts, whichever comes first. Using bigger parts could make it more powerful. Using a real H-bridge IC makes sense for this size of motor, but hobbyists love to do it themselves, and I thought it was about time to show a tested H-bridge motor driver that didn't use exotic parts __ Designed by Bob Blick
HD Video Cable Driver using Economical LT6559 - Single supply 5V HD Video Cable Driver with two resistors setting common voltage on capacitive coupled input. Two 270pF takes care of 10MHz filtering. This circuit depicts one of three channels. __ Linear Technology/Analog Devices App Note, Jul 2, 2012
High Power Ccfl Backlight Inverter for Desktop LCD Displays - DN164 Design Notes __ Linear Technology/Analog Devices
High Power Desktop LCD Backlight Controller Supports Wide Dimming Ratios While Maximizing Lamp Lifetime - DN264 Design Notes__ Linear Technology/Analog Devices
High-side driver feeds IGBTs & MOSFETs - 11/23/00 EDN-Design Ideas The low- to moderate-power system in Figure 1 provIdeas the interface between a pulse-width modulator and a high-side IGBT (insulated-gatebipolar-transistor) or MOSFET switch. You can use it to interface TTL or CMOS
circuitry to an H-bridge Design by Carlisle Dolland, Honeywell Engines and Systems, Torrance, CA
High-side driver has fault protection - 09/05/02 EDN-Design Ideas High-side drivers find common use in driving grounded solenoid coils and other loads. Short-circuit protection for such drivers is essential for avoiding damage from wiring faults and other causes. Polymer fuses are generally too slow, and discrete current-limiting circuits are large and cumbersome. The circuit in Figure 1 uses a small, low-dropout linear regulator as a high-side switch and p Design by Carl Spearow, Tokyo Electron, Gilbert, AZ
High-voltage Amplifier drives piezo tubes - 7-Dec-04 EDN-Design Ideas Piezoelectric tubular positioners that drive manipulators in scanning tunneling microscopes require high-voltage, low-current drive circuits. The circuit in Figure 1 can drive high-resistance, low-capacitance piezoelectric loads at a -3-dB bandwidth of 6 kHz. It offers a low-cost alternative to commercial driversPDF has several circuits, please scroll to find this one Design by Bipin Duggal, Netaji Subhas Institute of Technology, New Delhi, India
High-Voltage, High-Frequency Amplifier Drives Piezoelectric PVDF Transducer - 24-Jul-08 EDN-Design Ideas Finding wide use in nondestructive testing, a high-voltage, high-frequency amplifier drives a piezoelectric PVDF transducer Design by Enrique Vargas, Sergio Toral, Vicente González, and Raúl Gregor, Universidad Católica Nuestra Señora de la Asunción, Itapúa Antequera, Paraguay
I2C LCD Interface - Schematic Only
IC Forms Differential Line Driver/Receiver - 05/25/95 EDN-Design Ideas you can use the HFA1212 dual video buffer to implement differential line drivers and receivers with a minimum of external components Design by Mark Amarandos, Harris Semiconductor, Costa Mesa, CA
Illuminated Optical Magnifier - We often face problem while reading the values of ICs and miniature SMD components, detecting cracks or shorts in tracks in a PCB, or reading a finely-graduated vernier scale. Here is...__ Electronics Projects for You
Illumination Circuitry for Liquid Crystal Displays - Linear Technology AN49 __ Designed by Jim WilliamsAug 23rd, 1992
Illuminationry for Liquid Crystal Displays - AN49 Current generation portable computers and instruments utilize backlit liquid crystal displays. The back light requires a highly efficient, high voltage AC source as well as other supply circuitry. AN49 details these circuits and also includes sections on efficiency__ Linear Technology/Analog Devices
Impulse Changeover Switch - So what on earth is an 'impulse changeover switch'? Easya switch which changes state each time it gets an impulse. You may think it's just a fancy name for a bistableOK I admit it. However in the welding industry we used to use an 'impulse changeover relay' to control the direction of a d. c. motor used to oscillate a welding head between mechanical end stops. There was a roller-lever operated microswitch and two adjustable position blocks. Each time the microswitch hit a block, the relay changed over. How crude can you get? __ Designed by Richard Torrens
Interface LCD with ease - 04/27/00 EDN-Design Ideas Alphanumeric LCDs find use in various embedded systems. In these systems,µCs often lack I/O resources, so you must make optimum use of the available resources. LCDs have a bus-oriented interfacing structure, which consumes 11 I/O lines (eight data lines and three control lines) . You cannot always afford to spare this many I/O lines. Design by Bharat Mehta, Space Applications Center, Ahmedabad, India
Interfacing 16x2 Character - LCD to parallel port __ Designed by Craig Peacock
IRADK10 Motor Drive Reference Design Kit - The kit has a Graphical User Interface (GUI) that enables the user to control motor speed and set the basic control parameters such as PWM frequency and shut down conditions via the serial link.
Isolated Driver Forms Solid-state Breaker - 03/02/98 EDN-Design Ideas - (File contains many circuits, please scroll to find this one) This circuit allows standard TTL logic levels to safely drive a high-power dc load, circuit provIdeas also overcurrent circuit breaker functionality. Design by Bob Watson, Corley Manufacturing Co, Chattanooga, TN
Isolated MOSFET driver has wide duty-cycle range - 29-Apr-04 EDN-Design Ideas The main application for the circuit in Figure 1 is for driving power MOSFETs with signals ranging in frequency from 1 Hz to 300 kHz and with duty cycles from 0 to 100%. You achieve this goal by using a coreless pc-board transformer. The switching frequency in most power-electronics circuits ranges from a few hertz to a few hundred kilohertz Design by Jesus Doval-Gandoy and Moises Pereira Martinez, ETSI Industriales, Vigo, Spain
Isolated-FET pulse driver reduces size, power consumption - 03/30/06 EDN-Design Ideas Drive a capacitive-input power device with any duty cycle at frequencies up to 200 kHz Design by José M Espí, Rafael García-Gil, and Jaime Castelló, Electronic Engineering Department, University of Valencia, Spain
Keyboard Data Acquisition System is Cheap & Simple - 02/03/00 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 replace the outdated laboratory chart recorder in student Design Tom Lyons Fisher, Juniata College, Huntingdon, PA
Keyboard Data-Acquisition System Is Cheap & Simple - EDN-Design Ideas December 31, 1969 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 replace the outdated laboratory chart recorder in student laboratories. You can install the system in 5 sec, operate it with a single toggle switch, and construct it for approximately $40. The only additional equipment necessary is a computer running Excel and an ATbus (not Universal serial bus) , keyboard. Design by Tom Lyons Fisher, Juniata College, Huntingdon, PA
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