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Serial Port A/D-converter - . . .
Serial Port temperature datalogger - . . .
Simple control shuts down data-acquisition system - 03/14/97 EDN Design Idea One of the mOst effective ways to reduce circuit power is to
shut down unused components. Some circuits with power-shutdown capability reduce supply current 1000-fold
compared with normal operation. Placing data-conversion and support components in shutdo. . . [by Kevin
HOskins, Linear Technology Corp, Milpitas, CA]
Simple device for
connecting serial instrument with RS485 or RS232 to the internet - The device that converts RS485 and RS232 to the ethernet LAN has been developed. The device
was built with the Lantronix XPort embedded ethernet server and the industrial standard differential RS485
transceiver, 75176 and the single-end RS232 driver, MAX232. The XPort module provides 10/100 ethernet port
and the +3V logic UART. The 75176 and MAX232 are +5V TTL logic. . . [Wichit Sirichote, designer]
Simple Lie Detector - Here's a simple lie detector that can be built in a few minutes, but can be incredibly
useful when you want to know if someone is really telling you the truth. It is not as sophisticated as the
ones the professionals use, but it works. It works by measuring skin resistance, which goes down when you
lie. . . . [Design by Aaron Cake]
Simple RS422 Converter for
Minilogger - Build a simple line driver/reciever that
meets RS422A for the MiniLogger V1. 0. Place a distant Minilogger and communicate over a full duplex serial
line. . . . [Wichit Sirichote, designer]
Single-Board Measurement and
Control System - File contains several designs, please
scroll to find this circuit. . . . [Analog Devices-Analog Dialogue by Mills, John]
Single-Chip Digitally
Controlled Data-Acquisition as Core of Reliable DWDM Communication Systems - Analog Devices-Analog Dialogue. . . [by Malaeb, Mark]
Slotted Opto-Sensor
used in Honeybee Counter - I designed a circuit
similar to this one a long time ago to help a beekeeper count the number of bees going into or out of a hive.
The low power circuit uses a slotted opto-sensor to detect the passing bees. The circuit advances an
electronic counting . . . [Hobby Circuit designed by David Johnson P.E., 07/08/00]
Smart Metering
Technology Promotes Energy Efficiency for a Greener World - Analog Devices-Analog Dialogue. . . [by Harney, Austin]
Software-Programmable 12-Bit Data-Acquisition System -
File contains several designs, please scroll to find this circuit. . . . [Analog Devices-Analog Dialogue by
Garibian, Ed]
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 ]
Square Root Function Improves ThermOstat - 09/30/99
EDN Design Idea Perhaps the mOst elementary rule of control-loop design theory is that feedback-loop
performance is fundamentally linked to the careful choice—and stability—of loop gain. Insufficient loop gain
leads to poor setpoint accuracy. Too much gain can induce feedback instabilities, . . . [by W Stephen
Woodward, University of North Carolina, Chapel Hill, NC]
Statistics Using
Analog Techniques - Scroll to find this circuit. . .
[Analog Devices-Analog Dialogue by Smallwood, R. H.]
Strain gauge sensor - Schematic only, no circuit description. . . [Designer's name not given]
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