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Data Acquisition / Data Logging Circuits
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Last Updated: December 25, 2017 01:50 PM

Circuits Designed by Dave Johnson, P.E.

   120 VAC / 240 VAC IndicatorTwo LEDs indicate if a power line has 120vac or 240vac voltage on it . . . Hobby Circuit designed by David Johnson P.E.-July, 2006

   Audio Frequency Digital Noise GeneratorWhen you need to test an audio circuit with broadband noise, this circuit works great.  It uses just three inexpensive C-MOS ICs that generate a series of output pulses whose widths vary randomly.  I included a level control pot. . . Circuit by David A. Johnson P.E.-July, 2000


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

120 VAC / 240 VAC Indicator  -  Two LEDs indicate if a power line has 120vac or 240vac voltage on it . . . Hobby Circuit designed by David Johnson P.E.-July 09, 2006

12-Bit 8-Channel Data Acquisition System Interfaces to IBM PC Serial Port  -  DN35 Design Notes__ Linear Technology/Analog Devices

16-Bit, 250 kSPS, 8-Channel, Isolated Data Acquisition System   -  System Performance Figure 4 shows a plot of the ADC code occurrences for 10, 000 samples (1 sec at 1 kSPS) when CH0 through CH7 are shorted to GND on the terminal block of the evaluation board.  Note that 95% of the codes fall within 4 LSBs, and the peak-to-peak spread is approximately 7 LSBs.  The sampling rate 250 kSPS is controlled by the system demonstration platform (EVAL-SDP-CB1Z) , and the digital signal processing including the signal windowing and FFT is calculated on a PC by the CN-0254 evaluation software__ Analog Devices from the Lab

16-Channel 24-Bit Delta Sigma ADC Provides Small Flexible & Accurate Solutions for Data Acquisition  -  DN297 Design Notes__ Linear Technology/Analog Devices

18-Bit, 1.33 MSPS, 16-Channel Data Acquisition System   -  CN0269__ Analog Devices from the Lab

1-Wire Barometer  -  This article describes details for constructing a 1-Wire Barometer which will work on a Dallas Semiconductor Corporation 1-Wire network.   The reason for this second version is that the transistor level-changer of the original design was found to be temperature sensitive.  If you have constructed the original version (V1.0) you can modify it according to the diagram shown below.  This involves removing the transistor and 5 resistors, then rewiring it with 6 new resistors. __ Designed by David W. Bray

1-wire barometer  -  This is a description and the ongoing story of my project to build a 1-wire barometer based on the MPX4115A __ Designed by Philip Gladstone

1-Wire Barometer project  -  The 1-wire weather group is always looking for new sensors and ideas that will allow them to monitor more and more elements, the 1-wire barometer is just one of these sensors.  Based around the Motorola MPX4115A absolute pressure sensor, the group has been trying to design / decide on a good interface circuit for quite a long time.   __ Designed by Simon Atkin

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

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

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

4 Bit Digitizer / flash ADC using discrete components  -  This 4 bit digitizer originally appeared in my Lab Notes column in Polyphony magazine.  This type of analog to digital converter is usually called a flash converter because conversion happens asynchronously, with no clocks or strobes.  Input a voltage and the digital output appears in a flash :-) This design is fast enough to digitize signals into the low audio frequency range, less than 1kHz.  or so.   __ Designed by John Simonton

8-Channel Data Acquisition & Logging System  -  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

8-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

A 70-W S-Band Amplifier for MMDS & Wireless Data/Internet Applications 12/11/00   -  App Note 1038__ California Eastern Laboratories

A Collection of Differential to Single-Ended Signal Conditionings for Use with the LTC2400 a 24-Bit No Latency ΔσADC in an SO-8  -  AN78 Linear Technology This App Note describes six low power differential-tosingleended signal conditioning circuits forLTC2400 No Latency ΔΣTM 24-bit ADC.  These circuits offercustomer a number of choices for conditioning differential input signals as low as 5mV to as high as ±2.5V, as well as operation on a single 5V or ±5V supplies.  Each circuit description;;;;__ Linear Technology/Analog Devices

A Low Cost, 8-Channel, Simultaneously Sampled, Data Acquisition System with 84 DB SNR & Excellent Channel-to-Channel Matching   -  There is a maximum histogram spread of three codes, with each channel histogram centered on Code 1.  , Circuit Description, AC Performance in this circuit, the AD7607 is configured to operate in the external reference mode__ Analog Devices from the Lab

A Two Wire Isolated & Powered 10-Bit Data Acquisition System  -  DN19 Design Notes__ Linear Technology/Analog Devices

Acceleration Sensor Network  -  Data acquisition (DAQ) and data logging: Smart-its Add-On Board with Multiplexers and attachable 3D Acceleration Sensor Nodes __ Designed by Nicky Kern

Accelerometer Schematic  -  Below is a rough schematic of the layout of the accelerometer PC board looking from the component side.  The microcontroller is an Atmel AT89S8252, an 8051 clone.  This microcontroller is in-circuit programmable using an SPI interface.  The SPI pins are also used to drive the MMC.  To permit the dual use there is a jumper block (located below the 74AHC244, marked "P" __ Designed by Radio Amateur Society of Norwich

Accelerometer with microcontroller & display  -  The accelerometer can measure acceleration and time.  Using the time and the acceleration it can calculate and display:  Time (s) ; Average acceleration (m/s2) ; instantanous acceleration (min/max) (m/s2) ; Speed (m/s & km/h) ; Distance (m & km)  __ Designed by Jörgen Birkler

Achieve Simple Circuit IR data transmission from a PC’s serial port  -  10/11/07 EDN Design Ideas:  By transmitting appropriate hex values from a PC's serial port to a pair of IR LEDs, a remote-control IR receiver can enable 38.  4-kHz data transmission __ Circuit Design by Andreas Grün, Wedemark, Germany

Acquire Images with a Sensor & a Microcontroller  -  09/23/10 EDN Design Ideas:  Program a microncontroller to process images.   __ Circuit Design by Ioan Ciascai, Technical University of Cluj-Napoca, Cluj-Napoca, Romania, and Liliana Ciascai, Babes-Boylai University, Cluj-Napoca, Romania

Acquisition system is Programmable on the fly  -  12-Oct-95 EDN Design Ideas:  The programmable data-acquisition system in Fig 1 can take 333k samples/sec using a 3-�sec sampling ADC, IC 3.  Multiplexer IC 1 and programmable gain amplifier (PGA] IC 2  provide four truly differential channels and four decade gains of 1, 10, 100, and 1000.  These features allow the circuit to handle low-signal sensors without additional conditioning circuitry.  The circuit does not require __ Circuit Design by Sergey Velichko, SCP, Boise, ID

ADC Input Driver DIFFERENTIAL to DIFFERENTIAL  -  The last of our basic ADC input drivers is the differential input to differential output driver.  Suppose another part of your circuit already converted a singled-ended sensor signal to ± 2Vdifferential.  However, this differential signal sakes its way past noisy AC sources and switching power supplies.  __ 

ADC Input Driver DIFFERENTIAL to SINGLE-ENDED  -  Your data acquisition board has an ADC that accepts a single-ended input of 0 - 5 V.  However, your signal source happens to be differential.  This signal may be generated from a sensor bridge where one leg swings positive while the other swings negative in response to pressure, for example.  __ 

ADC Input Driver FULLY DIFFERENTIAL Amplifier  -  in this series of ADC input drivers, we've created differential outputs using the obvious - two op amps, one for the positive and one for the negative output.  Also, you need 8 resistors to accomplish the feat.  But, wouldn't it be grand if a single device produced with both positive and negative? __ 

ADC Input Driver SINGLE-ENDED to DIFFERENTIAL  -  The continuing story of input drivers brings us to the case where your signal source is single-ended, but your ADC accepts a differential input.  For example, a position sensor that swings +/-10 V gets muxed to an ADC that expects a +/-4V differential input centered around 2 V.  What's the solution?__ 

ADC Input Driver SINGLE-ENDED to SINGLE-ENDED  -  Suppose your sensor produces a bipolar voltage swing of ±10V.  The only problem, your ADC accepts a single-ended input of 0 - 5 V.  What you need is a circuit that will reduce your voltage swing__ 

ADC logger 6ch Measurent & serial port logger with wireless longrange link  -  Data acquisition (DAQ) and data logging circuit diagrams / circuit schematics __ Designed by March 5th 2009, oz2cpu Thomas Scherrer

ADC-to-PC interface transfers data in nibbles  -  12/09/99 EDN Design Ideas:  The circuit in Figure 1 uses a Centronics printer port to interface an eight-channel, 8-bit ADC to a PC.  The circuit cuts  cost of addressing and decoder circuitry and saves one expansion slot for interfacing.  The design uses three of  subportPDF has several circuits, please scroll to find this one __ Circuit Design by DS Oberoi, Jammu, India

Addressable ADC  -  Data acquisition (DAQ) and data logging circuit diagrams / circuit schematics __ Designed by Jon Fick

ADXL202 break-out board  -  Data acquisition (DAQ) and data logging circuit diagrams / circuit schematics __ Designed by David Bue Pederson

An Experimenter's 1-Wire Barometer  -  This article describes details for constructing a 1-Wire Barometer which will work on a Dallas Semiconductor Corporation 1-Wire network.   The reason for this second version is that the transistor level-changer of the original design was found to be temperature sensitive.  If you have constructed the original version (V1.0) you can modify it according to the diagram shown below.  This involves removing the transistor and 5 resistors, then rewiring it with 6 new resistors. __ Designed by David W. Bray

AN26A-R Interfacing the LTC1090/1/2  -  AN26 A collection of interface applications between various microprocessors/ controllers andLTC1090 family of data acquisition systems.  The note is divided into sections specific to each interface.  __ Linear Technology/Analog Devices

Analog Datalogger Based On T89C51RD2  -  I had requested by head of the department of Applied Physics to design a low-cost device for the workshop on "Building Simple instrument for Physics Lab" held in August 1, 2003 at the Faculty of Science, KMiTL.  The workshop has 29 participants.  All of them are from high school physics teachers.  The project was the cooperation between institute of Science and Technology Teaching Promotion and the Faculty of Science, KMiTL.  Basic concept of the hardware is not so different from the Minilogger V1.0.   __ Designed by Wichit Sirichote

Analog Signal Data Acquisition in Industrial Automation Systems  -  App Note/ 270 / Apr-04__ Maxim Integrated

Arduino Based Programmable Digital Data Display  -  LCDs are widely used in applications like token-display machines in smalls and supermarkets, order number displays in restaurants and café, and so on.  The project presented here demonstrates the working of__ Electronics Projects for You

Arduino datalogging accelerometer with µ-SD storage  -  Overview The Arduino Pro MinI is a microcontroller board based on the Atmel ATmega168 (datasheet).  It has 14 digital input/output pins (of which 6 can be used as PWM outputs) , 6 analog inputs, an on-board resonator, a reset button, and __ Designed by Eric Ayars

Arduino Realtime Audio Spectrum Analyzer with Video out!  -  Once again, I decided to put the old travel DVD player's screen to good use by using as an output device for the Arduino.  Though the DVD mechanism is broken, the screen allows for standard NTSC composite video input.  runs on an __ Designed by Paul Bishop

Atmel Mega32 8ch Analog signal measure logger  -  Data acquisition (DAQ) and data logging circuit diagrams / circuit schematics__ Thomas Scherrer OZ2CPU

Audio Frequency Digital Noise Generator  -  When you need to test an audio circuit with broadband noise, this circuit works great.  It uses just three inexpensive C-MOS ICs  that generate a series of output pulses whose widths vary randomly.  I included a level control pot . . . Circuit by David A. Johnson P.E.-July 04, 2000

Automating ADC Data Collection  -  App Note/ 929 / Jun-04__ Maxim Integrated

Automotive Electronic Functional Test using Agilent System Components  -  Application Note__ Aligent


Data Acquisition / Logging:  #'s -A      B - C      D      E - L     M - P      Q - T       U - V


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