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Driver
Circuits, Page 8
Drivers: #'s
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Last Updated on:
Monday, October 03, 2011 06:08 PM |
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Circuits Designed by Dave Johnson, P.E. : |
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SQUARE WAVE DRIVER HAS FLEXIBLE OUTPUTS
This circuit can produce an output signal ranging from DC to 100KHz. It can source a
voltage ranging from 1v to 30v. It can sink a voltage ranging from zero volts to
–30v. It can drive up to 200ma of current and can even be switched to a floating
tristate output.
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Links to electronic circuits,
electronic schematics, designs for engineers, hobbyists, students & inventors:
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Scheme provides high-side current-sensing for white-LED drivers - 19-Feb-04
Issue of EDN White LEDs find wide use in backlighting color-LCD screens in most
portable devices, such as cellular phones, PDAs, and MP3 players. Multiple LEDs often
connect in series to ensure that the same current flows through every LED. To
forward-bias these LEDs, a voltage of 10 to 16V comes from an inductor-based boost
regulator, such as an SP6690..... [Design Idea by Dimitry Goder, Sipex Corp, San Jose,
CA] |
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Senses & displays ambient light intensity - 11/09/06 EDN-Design
Ideas.....LED doubles as photosensor and visual indicator of ambient-light
intensity..... EDN is migrating links. This link is not verified. Search the
"title" EDN for new link. |
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Sensor Electronic Tracker with H-Bridge Drive - I decided to make a
commercial surface mount PC board using the LED2 sensor concept. It is quite sensitive
and can track to a few degrees of accuracy in bright sunlight..... [The site is owned
by Duane C. Johnson] |
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Simple Active-Matrix LCD Bias Supply Operates from Battery Input - 02/03/00
EDN-Design Ideas.....Many active-matrix-LCD applications need multiple voltages for
thin-film-transistor (TFT]bias. Typically, three voltages are necessary 5V for
column driver; a positive voltage, such as 10V; and a negative voltage, such -5V, for
TFT gate drive, or row driver. For handheld electronic devices, a battery must.....
[Design Idea by Michael Shrivathson, National Semiconductor Corp, Santa Clara, CA] |
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Simple Circuit Drives Latching Relays - 02/01/96 EDN-Design Ideas.....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 latching relays. Both windings for
the TQ2E-L2-5V two-coil relay are on the same magnetic element, so the windings'
fields add. You..... [Design Idea by Roy McCammon, 3M Austin, TX] |
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Simple Circuit for Driving MicroController Friendly PWM Generators -
Microchip Application Note Published 27-Jun-05.....[App Note] |
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Simple circuit smoothly drives stepper-motors - 28-May-09 Issue of EDN
The circuit in this Design Idea drives low-power, unipolar stepper motors using only a
shift register, a few resistors, and low-power transistors. Adding an inexpensive 4053
analog switch allows bidirectional switching..... [Design Idea by Uwe Schüler,
Institute of Physiology, Tübingen, Germany] |
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Simple single cell white LED driver uses improvised transformer - 15-Feb-07
Issue of EDN Minimal component-count circuit boosts a single cell's voltage to
light an LED..... [Design Idea by Jim Grant, Scientific Controls, Orlando, FL; Edited
by Brad Thompson and Fran Granville] |
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Simple Solenoid Driver Reduces Power & Cost - 07/18/96 EDN-Design Ideas EDN
is migrating links. This link is not verified. Search the "title" + "EDN" for new
link. |
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Simple VCOM adjustment uses any logic supply voltage - 30-Sep-04 Issue of
EDN All TFT (thin-film-transistor] LCD panels require at least one appropriately
tuned VCOM signal to provide a reference point for the panel's backplane. The exact
value of VCOM varies from panel to panel, so the manufacturer must program the voltage
at the factory to match the characteristics of each screen..... [Design Idea by Peter
Khairolomour and Alan Li, Analog Devices, San Jose, CA] |
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Simplest LED Flasher circuit - (schematic / circuit added 6/07) |
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Simplified white LED flasher operates from one cell - 26-May-05 Issue of EDN
1.5V circuit flashes white LED..... [Design Idea by Anthony H Smith, Scitech,
Biddenham, England; Edited by Brad Thompson] |
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Drivers:
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U-Z
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