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Data Acquisition / Data Logging Circuits
Data Acquisition / Logging: 
#'s -A      B - C      D - L      M - Q      R - T      U - Z


Last Updated: October 24, 2017 02:54 PM

Circuits Designed by Dave Johnson, P.E.

   Either indicates 120 VAC or 240 VAC  - Two LEDs indicate if a power line has 120vac or 240vac voltage on it. . . Circuit by David A. Johnson P.E.-July, 2006

   Honeybee CounterI 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. . . Circuit by Dave Johnson P.E.-July, 2000

   Indicates 120 VAC or 240 VA - CTwo LEDs indicate if a power line has 120vac or 240vac voltage on it . . . Hobby Circuit designed by David A. Johnson P.E.-January, 2007

Capacitance Proximity Switch
Draws very low power - Ideal for battery-powered applications
6 Models Available - Call 806-368-7747


Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

Eight Channel Data Acquisition & Logging SystE - M -  In environments like factories, power plants and transformers in electricity substations, controlling temperature to a safe value is important.  Supervisory and control systems are used to monitor the temperature and other...___ Electronics Projects for You

Eight-channel data-acquisition system features autocalibration -  12/03/98 EDN-Design Ideas The circuit in Figure 1  is a versatile, eight-channel, differential-input, 16-bit data-acquisition system.  A PC controls the circuit via the computer's parallel port.  Under control of the PC, you can select one of eight differential voltage inputs, each with a programmabl.   File has several circuits, scroll to this one__ Circuit Design by Mark Shill, Burr-Brown Corp, Tucson, AZMark Shill, Burr-Brown Corp, Tucson, AZ

Either indicates 120 VAC or 240 VAC  -  Two LEDs indicate if a power line has 120vac or 240vac voltage on it. . . Circuit by David A. Johnson P.E.-July, 2006

Electrically Isolating Data Acquisition Systems -  DN10 Design Notes___ Linear Technology/Analog Devices

Envelope Tracker Quells Jitter -  07/07/94  EDN-Design Ideas Fig 1's envelope tracking circuit solves the problem of receiving ac-coupled NRZ data over a coaxial data link.  Because the spectral content of the NRZ data approaches dc (even with alternate frame inversion) , the signal tends to integrate in any ac-coupl__ Circuit Design by Roger C Whipple, Hazeltine Corp, Braintree, MA

Essential Components of Data Acquisition System 5988-5386en -  Application Note___ Aligent

Experimental Laser Data Link -  This document tells about one of my experiments with semiconductor laser modules.  I bought one semiconductor laser for all kinds of experiments.  This TIM202 module is a small (38x14x14 mm) semiconductor laser module, similar to those types used in laser pointers.  It takes 3V 45mA and outputs 3-5mW 670nm laser beam. __ Designed by Tomi Engdahl

Fabricate a High-Resolution Sensor-To-USB Interface -  11/17/11  EDN-Design Ideas A precision analog acquisition system fits in your pocket.  The circuit in this Design Idea combines a mixed-signal microcontroller, a USB UART (universal asynchronous receiver/transmitter), and a novel adaptable analog sensor-input circuit.  It allows you to connect many types of sensors to the design’s two analog-input channels, control the device, and read measurement data on a USB host.  The USB connection powers the circuit.  You can control the device from your computer with simple commands; even terminal software can make the measurements__ Circuit Design by Zoltan Gingl, University of Szeged, Szeged, Hungary

Filter for the Earthworm Seismic Data Acquisition SystE - M -  The following design criteria were used to design the Earthworm Filter board.  It had to provide low output impedance, a low-pass filter of at least one pole, preferrably it should use
low power so that no external power would be necessary __

Galvanically Isolated, 2-Channel, 16-Bit, Simultaneous Sampling, Daisy-Chained Data Acquisition System  -  The results of their conversion are seen in Figure 2, which was obtained using the supplied evaluation software.  The supplied evaluation software can also be used to view FFT data (Figure 3) as well as a histogram for codes at a fixed dc level (Figure 4)___ Analog Devices from the Lab

General-Purpose Components Implement USB-Based Data-Acquisition SystE - M -  26-Jun-08 EDN-Design Ideas A serial ADC communicates with a PC's USB port through a serial-to-parallel converter and a USB-interface IC__ Circuit Design by V Gopalakrishnan, Indira Gandhi Centre for Atomic Research, Kalpakkam, India

Generating & Downloading Data to the Esg-D RF Signal Generator for Digital Modulation -  Application Note___ Aligent

gyro / accelerometer combo sensor -  In building a balancing robot you need a gyroscope unit and an accelerometer unit in order to get it to balance.  But I also wanted it to be reasonably low in cost with high performance and easily interfaced to a MCU.  Some of the other solutions are prohibitively expensive, even if they may work well.  Also the solution I had in mind had to be fairly small and use up little space and use up little power too __ Designed by Earl W. Bollinger

High-Precision, 18-Bit, 5 MSPS, Low Power Data Acquisition Signal-Chain  -  Figure 2 shows the typical integral nonlinearity as a function of the AD7960 output code is within the specifications of ±0.8 LSB using a 5 V external reference.  , CIRCUIT DESCRIPTION, Histogram and FFT Performance The precision performance of the circuit shown in the histogram plot in Figure 3 and the FFT plot in Figure 4 using a 5 V external reference___ Analog Devices from the Lab

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. . . Circuit by Dave Johnson P.E.-July, 2000

Indicates 120 VAC or 240 VA - C -  Two LEDs indicate if a power line has 120vac or 240vac voltage on it . . . Hobby Circuit designed by David A. Johnson P.E.-January, 2007

Inexpensive envelope tracker handles wide signal variations -  06/22/06 EDN-Design Ideas Two ICs recover NRZ data.  Converting band-limited NRZ (non-return-to-zero) data to a digital format suitable for microprocessors and other digital systems poses problems when a signal's duty cycle or amplitude varies or when its average level unpredictably wanders within a given dc range.  Transferring the signal to a fixed-reference comparator using ac coupling produces poor results because changes in duty cycle cause variations in average signal level that result in jitter or distortion of the output signal's timing.__ Circuit Design by Anthony Smith

Interfacing the LTC1290 -  AN36 A collection of interface applications between various microprocessors/ controllers and the LTC1290 family of data acquisition systems.  The note is divided into sections specific to each interface.  __ Linear Technology/Analog Devices

Interfacing the MAX7651/ MAX7652 12 Bit Data Acquisition System to the 24C02 2 Wire Serial EEPROM -  App Note/ 826 / Feb-07) __ Maxim Integrated

IR Terminal, Remote -  This unit provide 2 way IR communications using a numeric keypad and an LCD display.  Data is sent and recieved in ASCII with no regard to what the data means to any particular device __ Designed by Luhan MonatMesa Arizona

K2LMG/W5EUT 1-Wire Barometer--5/10 Volt Design vrs 2 -  This article describes details for constructing a 1-Wire Barometer which will work on a Dallas Semiconductor Corporation 1-Wire network.  It differs from the popular Version 1.1a in that it has more than twice the resolution. __ Designed by David W. Bray

K2LMG/W5EUT 1-Wire Barometer--5/10 Volt Design Vrs 3 -  This article describes details for constructing a 1-Wire Barometer which will work on a Dallas Semiconductor Corporation 1-Wire network.  This design differs from the popular Version 1.1a in that it has more than twice the resolution. __ Designed by David W. Bray

Keyboard Data Acquisition System is Cheap & Simple -  02/03/00 EDN-Design Ideas The most important criteria of a data-acquisition system for college science laboratories are simplicity and price rather than precision or speed.  The data-acquisition system in Figure 1 offers adequate precision of less than 0.5% and speed of 1 Hz to replace the outdated laboratory chart recorder in studentCircuit Design  Tom Lyons Fisher, Juniata College, Huntingdon, PA

Keyboard Data-Acquisition System Is Cheap & Simple -  EDN-Design Ideas December 31, 1969    The most important criteria of a data-acquisition system for college science laboratories are simplicity and price rather than precision or speed.  The data-acquisition system in Figure 1 offers adequate precision of less than 0.5% and speed of 1 Hz to replace the outdated laboratory chart recorder in student laboratories.  You can install the system in 5 sec, operate it with a single toggle switch, and construct it for approximately $40.  The only additional equipment necessary is a computer running Excel and an ATbus (not Universal serial bus), keyboard.   __ Circuit Design by Tom Lyons Fisher, Juniata College, Huntingdon, PA

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Data Acquisition / Logging:  #'s -A      B - C      D - L      M - Q      R - T      U - Z

 


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