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Grounding for
Low-and High-Frequency Circuits - Know Your Ground and
Signal Paths for Effective Designs. Current Flow Seeks Path of Least Impedance-Not Just Resistance. . . .
[AN-345: Analog Devices Application Note]
Implementing Temperature-Based Variable Fan Speed Control in Nlx Power Supplies - Application Note Published 4-Feb-03 . . . [Microchip]
Intelligent Thermal Management using Brushless DC Fans - Application Note Published 24-Feb-03. . . [Microchip]
Interfacing Microchip’s Fan Speed Controllers to a SPI? - Application Note Published 12-Nov-02 . . . [Microchip]
IR Digital Thermostat for
FAN - This circuit measures temperature in Celsius scale
and displays it on an alphanumeric LCD screen When temperature rise to 40 C an alarm is activated and at the same
time a relay is also activated which drives a fan to keep the temperature at a level. . . [by IQ Technologies
Industry, unless otherwise noted online]
Linear Voltage Fan Speed Control using Microchip's TC64x Family TC642, TC646, TC648 - Application Note Published 27-Jul-04 . . . [Microchip]
MOSFET switch provides efficient AC/DC conversion - 02/17/00 EDN Design Idea Occasionally, you have access to a transformer for powering a dc
circuit, but its output voltage is much higher than that required for the dc voltage. The full-wave-rectified and
filtered output of an ac input voltage V X , is V . . . [by Spehro Pephany, Trexon Inc, Toronto, ON, Canada ]
Noise
Filtering & the ADT7461 - AN-699 Analog Devices
Application Note . . .
Programming the Automatic Fan Speed Control Loop - AN-613 Analog Devices Application Note. . .
Protect system from overheating - 11/08/01 EDN Design
Idea The two-chip circuit in Figure 1 provides fan control and overtemperature warning and shutdown signals to
protect systems from excessive heat. The circuit monitors the temperature of the pc board and the die temperature
of a CPU, an. . . [by Kerry Lacanette, Maxim Integrated Products, Sunnyvale, CA]
Protects System from Overheating - 11/08/01 EDN Design
Idea The two-chip circuit in Figure 1 provides fan control and overtemperature warning and shutdown signals to
protect systems from excessive heat. The circuit monitors the temperature of the pc board and the die temperature
of a CPU, an. . . [by Kerry Lacanette, Maxim Integrated Products, Sunnyvale, CA]
Provide efficient fan-speed control - 03/04/04 EDN Design
Idea As Moore's Law plunges us into the realm of multigigahertz processors and PCs with gigabytes of RAM,
engineers face the task of removing the heat that these state-of-the-art components produce. Cooling such systems
poses a dilemma. . . . [by John Guy, Maxim Integrated Products, Sunnyvale, CA]
Provides Efficient Fan-Speed Control - 03/04/04 EDN
Design Idea As Moore's Law plunges us into the realm of multigigahertz processors and PCs with gigabytes of
RAM, engineers face the task of removing the heat that these state-of-the-art components produce. Cooling such
systems poses a dilemma. . . . [by John Guy, Maxim Integrated Products, Sunnyvale, CA]
PWM fan controller in an EMI-susceptible circuit - 02/16/06 EDN Design Idea Control it with either an external
negative-temperature-coefficient thermistor or a PIC microcontroller and its SMBus serial-data bus. . . [by
Dimitri Danyuk, Niles Audio Corp]
Redundant Fan Systems using the TC647 Fan Manager - Application Note Published 4-Feb-02 . . . [Microchip]
Remote Fan Control - You can get a remote control for tower fans, but they’re too noisy for the bedroom.
Propeller fans are nice and quiet, but they don’t come with remotes. So Andy devised a propeller fan remote
control that does not require line-of-sight, which makes it easier to use in the dark. . . . [Andrew R. Morris,
Gadget Freak Case #198, Design News]
Simple temperature regulated FAN speed
Controller - This regulator uses a P-FET to change the
positive supply voltage to a FAN an NTC resistor mounted on the device that needs cooling will change the fan
speed, the temperature on the heat sink will therefore be constant, while the FAN speed will change, depending on
power disipated The RPM output signal from most FAN types will continue to function, . . .
Single
Control Switch for Fan and AC - Here is an electronic
switch that can be used to switch on both the air-conditioner as well as fan of your room, one by one. . . . [©
EFY Enterprises Pvt. Ltd. All rights reserved.]
Speed Error in PWM Fan Control Systems TC646, TC647, TC649 - Application Note Published 27-Jul-04 . . . [Microchip]
Suppressing Acoustic Noise in PWM Fan Speed Control Systems - Application Note Published 27-Jul-04 . . . [Microchip]
System monitors multiple temperatures, controls fan speed - 10/12/00 EDN Design Idea The block diagram in Figure 1 represents a complete
remote-temperature-sensing and fan-control system. The system uses an Analog Devices temperature-monitor and
fan-control ASIC and a PIC16C84 µC from Microchip Technology. The AD. . . [by David Hanrahan, Analog Devices
Inc, Limerick, Ireland]
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