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RS-232C handshake lines transfer data frame - 10/23/97 EDN Design Ideas: The asynchronous RS-232C interface is a simple, low-cost option for interconnecting processor-based systems, but this character-oriented interface supports no direct mechanism to transfer variable-sized messages as self-contained data packets.
__ Design by SK Shenoy, Naval Physical & Oceanographic Lab, Kochi, India
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. __ Designed by Wichit Sirichote
RTC-Based Event Logger - Event log data is a unique source of information for security, audit, compliance and troubleshooting purposes. An event logger enables you to view the log of a series of events. This__ Electronics Projects for You
Self-Powered Solar Data Logger - My project is a self-powered solar data logger. Put out in the sunlight, it will measure the light level and log this to memory to be later downloaded to a computer. The system is powered by a small solar panel and battery__
Serial Port A/D Converter - This circuit is a simple adapter for PC parallel port to think that there is a printer connected to computer. This adapter is useful for testing printing speed with different software and as a part of your own designs.
You can use this circuit to connect your simple circuits to the parallel port __ Designed by Tomi Engdahl
Serial Port temperature datalogger - Features: provides real-time data to your computer via serial port, interfaces up to four DS1820 temperature sensors, absolute accuracy near 0.5 degrees celcius (as per DS1820 specifications) , relative accuracy near 0.01 degrees celcius, speaks in Centigrade or Fahrenheit (selectable by header pins) , __ Designed by mail at quinapalus dot com
Simple Circuit Computer A/D Uses a Serial Port - Here is an inexpensive way to get slow-moving analog data directly into a spreadsheet on your computer! A simple circuit connects to a serial port and a short Qbasic program gathers and saves 12 bit data to a file. A spreadsheet automatically retrieves the file and displays the data in real time. Once the data is in the spreadsheet, the full power and flexibility of the office suite is available. __ Designed by John Nooyen
Simple Circuit control shuts down data-acquisition system - 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 shutdown between conversions or when conversions are unnecessary significantly reduces supply current and average dissipation. Design by Kevin Hoskins, Linear Technology Corp, Milpitas, CA
Simple Circuit Data-Logging Weather Station, Pt. 1 - it's cheap and simple to build, operates completely unattended and will run for years on a set of AA batteries.__ SiliconChip
Simple Circuit Data-Logging Weather Station; Pt.2 - Last month we introduced our new Rain and Temperature-Measuring Weather Station, with all the electronics. This month we get into the nitty-gritty of building it - all the mechanical detail and then actual contstruction.__ SiliconChip
Simple Circuit 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 __ Designed by Wichit Sirichote
Simple Circuit 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 __ Designed by Aaron Cake
Simple Circuit 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. __ Designed by © Hack Canada
Simple Circuit RS422 Converter for Minilogger - Build a simple RS422 converter for the Minilogger. __ Designed by Wichit Sirichote
Simpler temperature datalogger based on PIC12F683 & Maxim DS18B20 - it is a very simple data logger project based on PIC 12F683 microcontroller. The microcontroller reads temperature values from a temperature sensor on a regular interval basis and stores them into its internal EEPROM memory. The recorded temperatures can be later transferred to a PC through serial interface. I originally published this project on electronics-lab.com last summer.__
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.-July 08, 2000
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 __ Designed by Luhan Monat - Mesa Arizona
Square Root Function Improves Thermostat - 09/30/99 EDN Design Ideas: 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, Design by W Stephen Woodward, University of North Carolina, Chapel Hill, NC
Tape Recorder-4.5 H Magnetic Play-Back Head Preamplifier-Using Model 425 - No description, just schematic - OpAmps Lab inc is the manufactor ofAmplifiers (Video / Audio / Distribution / Microphone / Equalization / Line / VCA / Power) , Switchers (Routing / Assign / Matrix) , Mult (Press) (Network-Feed) Boxes, Audio Transformers, Oscillators, Power-Supplies, Custom Sub-Systems. __ Application OpAmps Lab Inc.
Tape Recorder-Self-Resolver-Using Models 39, 425 & 700 - No description, just schematic - OpAmps Lab inc is the manufactor ofAmplifiers (Video / Audio / Distribution / Microphone / Equalization / Line / VCA / Power) , Switchers (Routing / Assign / Matrix) , Mult (Press) (Network-Feed) Boxes, Audio Transformers, Oscillators, Power-Supplies, Custom Sub-Systems. __ Application OpAmps Lab Inc.
Telephone Call Logger - it logs all outgoing calls and can download the data via your PC's serial port to an Excel spreadsheet.__ SiliconChip
Temperature Data Logger - This project will show you how to build Temperature Logger using a Stamp iI connected to a PC serial port. I was planing on using the DS1620, but used a LM335 temperature sensor because it only needs a two wire interface and it is easy to waterproof. All I did to waterproof it was to put some heat srink tubing around the 3 wires then around the hole sensor __ Designed by shaunwilson19 @ yahoo.com
Temperature Measurement using the LTC1090/91/92 Series of Data Acquisition Systems - DN5 Design Notes__ Linear Technology/Analog Devices
Thermostat Node Schematic - Circuit Only __ Designed by Ed Cheung
Tiny Server - 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 __ Designed by Wichit Sirichote
Trace voltage-current curves on your PC - 10/11/01 EDN Design Ideas: Some years ago, one of the fundamental electronic instruments was the laboratory curve tracer. A CRT display would sweep out terminal behavior (current versus voltage] from which you could derive mathematical models. Classic present Design by Clayton Grantham, National Semiconductor, Tucson, AZ
Track multisite temperatures on your PC - 04/18/02 EDN Design Ideas: The low-cost circuit in Figure 1 allows you to track four remote temperatures with thermistor sensors through the parallel port on your PC. This four-zone thermometer instrument has a temperature range of –40 to +90°C and a resolution of better than ±1°C. You can calibrate its accuracy to within 1°C over a 0 to 50°C span and within 3°C over a –40 to +90°C span. Thermistors are low-cost, passive, rugged components, making them a good choice for temperature sensing. The signal-conditioning hardware in Figure 1 performs a simple voltage division to partially linearize the thermistors. Design by Clayton Grantham
Transfer data frames over asynchronous RS-232C lines - 01/15/98 EDN Design Ideas: The asynchronous RS-232C interface is a simple, low-cost option for interconnecting processor-based systems. In many applications, you need to transfer variable-size messages. However, the character-oriented RS-232C protocol offers no direct mechanism for transferring messages as self-contained packets. The method described here uses an obscure feature found in most UART devices to indicate packet boundaries. The feature is the capability to transmit and recognize the "Break" character. Design by SK SHENOY, NAVAL PHYSICAL AND OCEANOGRAPHIC LAB, KOCHI, INDIA
TSR Logs Assembler & Compiler Errors in File - 04/27/95 EDN Design Ideas: if you use a PC to develop software for embedded systems, you probably still use good, old MS-DOS for most of your processing, because most compilers, assemblers, and linkers don't run under MS Windows. If you're developing a sizable program, you probably use automated procedures such as batch files or "make" files to build and rebuild your target program. When you use batch files or make files, capturing the PC's screen output in a disk file is more convenient than sitting around, watching everything endlessly scroll by on the screen Design by John
Santic, Computer Consultant, Frederick, MD
Two Wire Isolated & Powered 10-Bit Data Acquisition System - DN19 Design Notes__ Linear Technology/Analog Devices |
