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Single-switch controls digital potentiometer - 02/07/02 EDN Design Idea The control of electronic potentiometers in most today's
applications comes from controller-generated signals. However, a significant number of applications exist
that require adjustments using manual, front-panel controls. The circ. . . [by Chuck Wojslaw and Gary M
Craig, Catalyst Semiconductor, Sunnyvale, CA]
Slot Termination Components for
Pentium Ii & Xeon Processor-Based Multiprocessor Systems - Application Brief # 026. . . [Pericom Semiconductor]
Slow Motion Clocksometimes the sleep mode will not work for some application that needs to keep an eye on
some things while radically conserving power. In that case, you can just slow down the (RC) clock speed by
switching a second resistor in or out of the circuit. . . [Luhan Monat - Mesa Arizona]
Software Calibrated, 1
MHz to 8 GHz, 60 dB RF Power Measurement System Using the AD8318 Logarithmic Detector
- Software Calibrated, 1 MHz to 8 GHz, 60 dB RF Power Measurement System
Using the AD8318 Logarithmic Detector. A calibration is performed by applying two known signal levels close
to the endpoints of the AD8318 linear input range and measuring the corresponding output codes from the ADC.
This deviation is expressed in dB using the equation where CODE_OUT is the ADC output code; SLOPE_ADC is the
stored ADC slope in codes/dB; INTERCEPT is the stored intercept; and PIN_TRUE is the exact (and unknown)
input level. , The plots shown in Figure 3 through Figure 8 show the typical system performance that can be
obtained using the AD8318 and AD7887BR in an RF power measurement system. . . [Analog Devices-Circuits from
the Lab]
Software Implements Digital Potentiometer - 06/08/95 EDN Design Idea In some applications (for example, dynamic biasing of laser
diodes) , the use of digital potentiometers, or trimDACs, has limitations because of resolution, accuracy, or
interface difficulties. Using the simple (but maybe not so obv. . . [by Gray Creager,Xicor Inc, Milpitas, CA]
Software Pid Control of an Inverted Pendulum using the PIC16f684 - Application Note Published 1-Dec-04. . . [Microchip]
Software Stack Management -
Application Note Published 26-Aug-97. . . [Microchip]
Solar Charger - PIC Project The previous version of this device used pulse width modulation (PWM) to
control the power from the five solar panels to charge the battery bank. Under full sun conditions the
MOSFETS got a bit warm and the whole unit radiated a lot of RFI. This design uses a set of relays, one for
each panel. If the controller decides the battery voltage is too low, it engages another relay;. ) . . . [Luhan
Monat - Mesa Arizona]
Solution for PC100 Compliant Modules - Application Brief # 017. . . [Pericom Semiconductor]
Speech EEPROM - 24LC512 EEPROMS contain 64k bytes and cost about $3. That makes them ideal for adding some
speech to small projects. Here is the set of (DOS) programs and files to do this. This is how the speech was
added to the Talking Fish project. . . [Luhan Monat - Mesa Arizona]
Speed Control for RC Car - DC motor PWM controller that takes the1ms to2ms pulse from the RC receiver and converts it
into a PWM train at1Khz. . .
Speed Control with Reverse - A digital speed control with BEC (electronic design added. . .
Speedy logic translator uses little power - 12/31/69 EDN Design Idea In handheld equipment, component count and power consumption are
critical considerations. This Design Idea uses only a few transistors to configure a high-speed output stage
of an RS-232C link while draining few precious milliamperes from the batteries. In general. . . [by Davis
Magliocco, CDPI, Scientrier, France]
SPI Flash Microcontroller
Programmer - This SPI Flash Programmer can be used
either for in-system programming or as a stand-alone serial flash programmer for the Atmel SPI programmable
devices. The programmer hardware interface is controlled by the PC parallel port and the parallel port
control signals are freely selectable by the user. The software supports both the 8051 and AVR series
devices. . . [by Mohammad Asim Khan]
Spydar 2 - PIC Project This is a circuit monitoring device. It runs for over 10 days and can log up to
32k events both digital and analog. Samples are logged either on a timing basis (. 01 to 2. 5 seconds) , or
on a triggered basis. Four inputs are provided, up to three of which can be analog. . . [Luhan Monat - Mesa
Arizona]
Standalone Digital Voltmeter Uses A Multichannel ADC - 11/15/12 EDN Design Idea Monitor several different voltages with one instrument. This
Design Idea was realized for voltage/current measurement on a four-channel analog voltage source but has wide
use in many other applications. The design is based on the Atmel ATmega8-16AC microcontroller and the MAX1230
12-bit ADC (references 1 and 2). Although the microcontroller has an internal 10-bit ADC, it’s more efficient
to use an external multichannel ADC than to multiplex more analog channels to the ATmega8-16AC differential
ADC inputs. . . [by Branislav Korenko]
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