HV823 & HV825 EL Lamp Driver Circuits  -  Supertex Semiconductors. . .   

HV826 EL Lamp Driver Circuits  -  Supertex Semiconductors. . .   

HV831 Dual EL Lamp Driver Circuits  -  Supertex Semiconductors. . .   

HV833 EL Lamp Driver Circuits  -  Supertex Semiconductors. . .   

HV857 EL Lamp Driver Circuits for Low Audible Noise  -  Supertex Semiconductors. . .   

HV9931 Unity Power Factor LED Driver  -  Supertex Semiconductors. . .   

HVCMOS Drivers for Non-Impact Printing  -  Supertex Semiconductors. . .   

IC Forms Differential Line Driver/Receiver  -  05/25/95 EDN Design Idea   You can use the HFA1212 dual video buffer to implement differential line drivers and receivers (Fig 1) with a minimum of external components. Common-mode rejection is a function of the internal matched thin-film resistors, which you can pin-strap to set the required loop gains. . .  [by Mark Amarandos, Harris Semiconductor, Costa Mesa, CA]

Ignition Coil Driver  -  This is a high energy ignition coil driver circuit capable of running from AA batteries. WARNING:This circuit contains voltages and currents which can KILL if you are not careful. Charged capacitors will SURPRISE YOU! They can hold a lethal charge for hours!. . .  [Circuit designed by Robert Dvoracek 25-7-05 ]

Implementing an Isolated Half-Bridge Gate Driver  -  Analog Devices-Analog Dialogue. . .  [by Kennedy, Brian]

Improved Solar LED Spot Light  -  Nearly all the Chinese made solar powered LED lights I see being sold at Lowe's and Home Depot home improvement centers are poorly designed. Their solar panels and battery packs are all undersized. The light from their Chinese made LEDs fade rapidly and the devices never make it through a complete night before the light dies . . . [Circuit by David Johnson P.E.,  02/03/13]

Impulse Changeover Switch  -  So what on earth is an 'impulse changeover switch'? Easy - a switch which changes state each time it gets an impulse. You may think it's just a fancy name for a bistable - OK 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? . . .  [Page's Author: Richard Torrens]

Increase Efficiency In Embedded Digital-I/O Lines  -  04/21/11  EDN Design Idea  Multiplex IO lines and drive LEDs without ghosting. Digital-I/O-multiplexing techniques, such as “Charlieplexing” or “Gugaplexing, ” let an eight-digit, seven-segment LED display connect to nine I/O pins of a microcontroller (references 1 and 2). These methods use lower-duty-cycle timing, which requires a driver between the microcontroller’s I/O lines and the display to achieve good visibility. The circuit in Figure 1 uses an 8+N/2 I/O bus for interfacing an N-digit display and as many as eight buttons on the same bus. This method needs no driver. You can apply it to any programmable device with LED-driving capabilities, such as small PIC or Atmel microcontrollers. . .  [by Vasile Surducan and Emanoil Surducan, National Institute for R&D of Isotopic and Molecular Technologies, Cluj-Napoca, Romania]

Increased power for LED Flasher  -  Power LEDs are becoming more popular these days. The DC input power to these devices ranges from 1 watt to 5 watts. Normal LEDs only receive about 0. 05 watts. At this higher power, these devices can emit a lot of light . . . [Hobby Circuit designed by Dave Johnson P.E.,  08/03/08]

Indicates 120 VAC or 240 VAC  -  Two LEDs indicate if a power line has 120vac or 240vac voltage on it . . . [Hobby Circuit designed by David A. Johnson P.E.,  01/07/07]

Indicates Battery Charge Current  -  This circuit turns on a LED whenever it detects at least 25ma of battery charge current . . . [Hobby Circuit designed by David Johnson P.E.,  07/23/06]

Inductive Based Switch Reg Circuits Provide High Efficiency White LED Drives (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, 6-May-13]

Inductive Based Switching Regulator Circuits Provide High Efficiency White LED Driver  -  Application Note 1250 September2002. . .  [National Semiconductor]

Inductive Pulse Receiver (175Khz)  -  This circuit is discussed in more detail in the Experimenters Journal. The receiver’s six inch diameter coil detects the ring signal from the above transmitter and use a single NPN transistor to provided enough Amplification for the signal to be easily viewed on an oscilloscope . . . [Hobby Circuit designed by David A. Johnson P.E.,  06/27/00]

Inductive-Based Switch Reg Circuits Provide High-Efficiency White-LED Drvs  -  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, 29-Apr-02]

Inexpensive LED Drives Flash-and-Beep Circuit  -  06/05/97 EDN Design Idea   Sometimes, you need an alarm that is both audible and visible in an application that's stingy with space, power, and budget. The circuit in Figure 1a is compact, efficient, and inexpensive. The F336HD flashing LED (part no. 276-036 at Radio Shack) is a useful device. . .  [by Dennis Eichenberg, Parma Heights, OH]

Interrupt-Based PIC18 Master LIN Driver in C for Enhanced Usart  -  Application Note Published 23-Dec-03. . .  [Microchip]

IR Remote LED Indicator Light  -  There are times when you would like to transmit a signal from one LED indicator light to second LED at another location. The circuit below works well for this application. It takes advantage of the fact that the internal infrared LED inside an opto-isolator . . . [Circuit by Dave Johnson P.E.,  12/28/08]

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 circuit breaker  -  03/02/98 EDN Design Idea   (File contains many circuits, please scroll to find this one)  Two capacitors following the common-mode choke can reduce high-frequency differential-mode emissions caused by non-common-mode currents. (DI #2160)The circuit in Figure 1 allows standard TTL logic levels to safely drive a high-power dc load. The circuit provides for both signal and ground isolation as well as a solid-state circuit breaker. . .  [by Bob Watson, Corley Manufacturing Co, Chattanooga, TN]

Isolated MOSFET driver has wide duty-cycle range  -  04/29/04  EDN Design Idea   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. . .  [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 Idea   Drive a capacitive-input power device with any duty cycle at frequencies up to 200 kHz. . .  [by José M Espí, Rafael García-Gil, and Jaime Castelló, Electronic Engineering Department, University of Valencia, Spain]

JT-10KB-D Isolates & Converts Speaker Drive to Line Level  -  AS068 Application Note (App Note - 11/02) . . .  [Jenson Transformers]

Keyboard Data Acquisition System is Cheap & Simple  -  02/03/00 EDN Design Idea   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. . .  [by Tom Lyons Fisher, Juniata College, Huntingdon, PA]

      <<<< Previous   PAGE   Next >>>>