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Power Chopper 1 - (Schematic added 11/06) |
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Power Factor Corrector - (application / block diagram added 6/07) |
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Programmable source powers DC micromotors - 03/01/01 EDN-Design Ideas: A simple,
economic, compact, and tricky way of using the LM723 as a programmable voltage source
to drive dc micromotors which can set the output to a value of200 mV to 6V.....(design
idea added 2/06) |
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Programming the Automatic Fan Speed Control Loop - AN-613 Analog Devices
Application Note (app note added 2/06) |
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Pulse Width Modulation DC Motor Control - ….(electronic schematic added 06/09) |
| Pulse Width Modulation DC Motor Control (Aaron Cake)
- controls the motor speed by driving the motor with short pulses (added 5/02) |
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Push Button Motor Control - (electronic design added 6/07) |
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Push Button Motor Control Circuits - (diagram added 2/07) |
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Push-Pull Converter - (application / block diagram added 6/07) |
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PWM Circuit for Motor Speed Control - Sometimes you want to slow down a brush type
DC motor. The most efficient way to do this is with a pulse width modulation (PWM)
technique. The hobby circuit below can operate from about 3 volts to 15 volts. The
frequency is fixed at about 2KHz but the pulse width can be varied from nearly 100% to
0%. ... ….(designed by David A. Johnson) |
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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:
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.... 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.....(design idea added1/05) |
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PWM DC Motor Speed Control - using a 556 dual timer IC (circuit add 6/07) |
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PWM Motor Controller - (electronic circuit added 4/05) |
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PWM Motor Speed Controller/DC Light Dimmer - DC Light Dimmer using a LM324 IC
(electronic circuit added 4/05) |
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PWM Motor/Light Controller - The diagrams are for 12V operation only and there are
high side (common ground) and low side (common +12V) versions. The low side version of
the circuit uses an N Channel FET, the high side version of the circuit uses a P
Channel FET. N Channel devices tend to handle more current than P Channel devices,
they are also less expensive. The high side version of the circuit is useful when one
side of the load has to be grounded....(circuit add 6/07) |
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PWM Speed Control - includes theory and some example circuits (added 5/02) |
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Redundant Fan Systems using the TC647 Fan Manager - Microchip Application Note
Published 4-Feb-02 (app note added 2/06) |
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Reversing H-bridge - This H-bridge variant was one of the first in which the
reversing circuitry is built into the driver, rather than (as is more-commonly done)
into the control circuitry upstream of the driver. This is a handy circuit, though,
for 2-motor walkers -as all that is required to reverse one is to reverse the phasing
of one of the motors. (added 11/05) |
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Room Temperature Controller - room temperature controller with PIC. This equipment
uses two temperature sensors, drives external equipment, and keeps the temperature of
the room at preset temperature. The purpose of this equipment is for preventing room
temperature going up with the heat of the computers. Electric cost will become high if
an air-conditioner is always operated. Then, I made the equipment which adjusts the
temperature of the room automatically using some ventilation fans. The function below
preset temperature is a function attached moreover. I think that it can use for
temperature control, such as a greenhouse. ….(design added 11/08) |
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Rotary Controller Positions Stepping Motor - 08/03/95 EDN-Design Ideas: (design
idea added 3/03) |
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Route Control for Stall Motor Switch Machines - (circuit / schematic design added
6/06) |
