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Pulse Width Modulators (PWM), page 3
PWM Circuits: #-A B-O P
Q-Z
Last Updated on:
Friday, August 29, 2008 02:33 PM
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| Links to electronic circuits, electronic schematics, designs for engineers,
hobbyists, students & inventors: |
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PLD code creates PWM generators: 08/08/02 EDN Design Ideas / (added 1/05) The PLD (programmable-logic-device)
code in Listing 1 creates arbitrary-resolution, pulse-width-modulated (PWM) generators. PWM generators are useful as low-bandwidth D/A converters in hardware of microprocessor-based systems. When
you pass it through a simple RC lowpass filter, a PWM waveform becomes a voltage that's approximately equal to the PWM duty cycle times the supply voltage.... |
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Processor's PWM output Controls LCD/LED Driver: 05/27/04 EDN Design Ideas / (added 1/05) The PWM
(pulse-width-modulation) output available from many microprocessors is based on an internal 8or 16-bit counter and features a programmable duty cycle. It is suitable for adjusting the output of an
LCD driver, a negative-voltage LCD driver, or a current-controlled LED driver. cost alternative that provides not only a 4to 20-mA output, |
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Provide 4 to 20 MPWM Control: 09/01/98 EDN-Design Ideas / (added 5/02) -Are useful when you use4to20-mA
current-loop signals to control a PWM signal |
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Pulse Width Modulation A/D Conversion Techniques with COP800 Family Microcontrollers: National Semiconductor Application Note (app note added 2/06) |
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Pulse Width Modulation DC Motor Control: controls the motor speed by driving the motor with short pulses (added 5/02) |
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Pulse Width modulator 4093: (circuit added 9/04) |
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Pulse Width modulator 555: (circuit added 9/04) |
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Pulse Width Modulators: generating PWM waveform is extremely simple with the circuits shown in this page (added 5/02) |
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Pulse Width-to-Voltage Converter: (electronic (schematic / circuit added 4/02) |
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PWM AC-DC Power Supply Design - App Note 35: Apex Microtechnology Corp App Note (added 6/06) |
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PWM ADC is Surprisingly Accurate: 06/09/94 EDN-Design Ideas / (added 3/03) The reference voltage in Fig 1a's simple
rail-to-rail PWM ADC is the only critical component. The input-voltage range extends from ground to the power rail which also acts as the reference. The circuit is essentially a variation on the
classic dual-slope integrator, the slopes being proportional to VIN and VREF-VIN. The circuit works well in µP-based systems that have the spare capacity to perform the mark/space measurement and
the necessary calculations..... |
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PWM circuit controls sensor's AGC: 03/29/01 EDN-Design Ideas / (added 2/06) |
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PWM circuit uses fuse to sense Current: 12/23/99 EDN-Design Ideas / (added 3/03) |
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PWM Circuit uses one OpAmp: 07/06/00 EDN-Design Ideas / (added 6/03) circuit delivers a rectangular signal with duty cycle
varying between0 and100% in response to an input signal varying from0 to5V dc |
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PWM Controller: 555 Timer based PWM motor control project for electric fan or other DC motor (added 5/02) |
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PWM Controller Drives LEDs from high Voltage lines: 03/04/04 EDN Design Ideas / (added 1/05) Powering LEDs
from a wide dc range—say, 30 to 380V—without wasting a lot of power in the regulating block, is a difficult task when the LED current needs to be constant. Dedicated LED drivers are available, but
they usually implement boost structures and are thus inadequate for high-voltage inputs.... |
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PWM DC motor Control with SG3525: (electronic circuit added 4/05) |
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PWM DC Motor Speed Control: (electronic (schematic / circuit added 4/02) |
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PWM Hydrogen Generator: (circuit / schematic design added 11/06) |
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PWM Low Pass Filtering - App Note 32: Apex Microtechnology Corp App Note (added 6/06) |
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PWM Methods for Expanding CCRL Dimming Range Using the ML4877 or ML4878 / ABR-42023: Fairchild Application Notes / (app note
added 6/06) |
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PWM motor Controller: (electronic circuit added 4/05) |
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PWM Motor Speed Controller/DC Light Dimmer: (electronic circuit added 4/05) |
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PWM Motor/Light Controller: (circuit / schematic design added 6/06) |
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PWM Motor/Light Controller Variations: diagrams are for12V operation and there are high side (common ground) and low side (common +12V)
versions (added 5/02) |
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PWM Speed Control: includes theory and some example circuits (added 5/02) |
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PWM Watchdog Circuit Ensures upper Bounds: 11/07/96 EDN-Design Ideas / (added 5/02) With PWM control of power factor, you
need a continuous check on excess pulse width and dead periods to protect a variety of systems that may not incorporate such protection. You also need regular pulsed power to ensure good averaged,
reconstructed power-signal waveforms for which the dead period for the PWM signal must not exceed limits. The circuit in Figure 1 monitors both excess high-level pulse width and excess dead period
and visually warns the user of problems in the PWM function. Excess high-level pulse width turns on the normally off, red LED, and excess.... |
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PWM White LED Drivers: (electronic circuit added 4/05) |
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PWM, a Software Solution using the 16CXXX Devices: Microchip Application Note Published 26-Aug-97 (app note added
2/06) |
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PWM Circuits: #-A B-O
P Q-Z |
