Questions tagged [datalogger]

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Send data over server from microcontroller

How large chunk data of data is send over internet using GSM module or ESP from some kind of microcontroller. As they both have a limit of data sent by TCP so how is it done and what is used to ...
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3answers
83 views

Low-power Linux-based ARM system on module for data logger? [closed]

I want to develop a data logger with several hardware characteristics (low-power consumption, SDI-12, I2C, SPI, UART, USB, Ethernet, touchscreen display, SD card, RTC, internal memory at least 128MB......
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0answers
42 views

SD card sharing between atmega2560 and sim800

I am designing a data logging system that uploads its data via 2G, and downloads new firmware from a server to the SD card, which the mcu boots from. So far, I have achieved Over The air update by ...
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1answer
90 views

Does a program exist to draw logic signal waveform from csv data?

Assuming that I want to collect several seconds of activity of digital signal on multiple pins of a device, one way is to create a simple FPGA design that buffers all that information and then ...
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0answers
43 views

Wireless ADC Logger Test System

I am looking for a wireless ADC data logger system. The idea is to be able to connect to a test sensor and save output data on a pc. Ideally the system would have: Range of at least 10 meters Be ...
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1answer
134 views

Connecting K-Type Thermocouple wires to a data logger with a male and female plug

I'm trying to setup a temperature data logger using Graphtec GL240. I will be using K-type thermocouples for the logger. I want to run short length of k type cables from the logger to a female K type ...
2
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1answer
463 views

Resetting of NodeMCU ESP8266 in deep sleep

I have been doing a project as my first project to learn ESP8266 applications. My project is a temperature and humidity values data logger and upload the data to Thingspeak. The sensor used is DHT11. ...
2
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1answer
220 views

How to save a bit sequence from oscilloscope?

I'm using two wires to communicate between devices. First wire is a clock, second is a data bit. Logic is simple: master device (AVR ATMega in my case) sets a value on the data pin, then raise "1" on ...
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1answer
77 views

What do I need to do to connect an ADC IC to a Adam 6066??Is it even possible to read the inputs from the ADC chip?

I am working on a input array that uses a ADC (MCP3208 or something similar) to read in several analog inputs and convert them to Digital signals that go into an ADAM 6066 Module. What would I need to ...
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1answer
288 views

FatFs strange behavior when writing to text file

I wrote a small program with PIC32MX microcontroller that sends data to a txt file in the SD card, then reads the data back from the file and finally compares the data before sending them with the ...
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1answer
64 views

hardware interfacing and data logging

I am working on a idea. The idea is to measure current from a current source, which transmits 3 levels (ex: 10 20 30mA). Which if possible should be logged, representing 3 states with 3 different ...
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1answer
66 views

way to display the data from a multi function meter [closed]

I have a multi function meter and i want to collect the data and display it. My idea was to create a api for serial communication?? will the idea work or is there any other better way?? the meter uses ...
3
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1answer
308 views

Ultra low power audio recorder

I'm trying to design an ultra low power audio recorder, in order to monitor ground noise in rural areas. The circuit I'm working on is based on a microcontroller (STM32L100RC) and an audio codec (...
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1answer
289 views

Why are high-sampling-rate data acquisition boards so expensive? [closed]

An example would be the NI USB-6366. My guess is that it's primarily due to the analog-to-digital converter (ADC) since it should be the component responsible for the high rate conversion, even ...
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0answers
185 views

Logging current draw over time, 100mA +

What is a good way to log(sample) current draw over a period of time, from e.g a RaspberryPi with some equipment connected to it (100 mA +). A datalogger like the EasyLog | EL-USB-4 have a ...
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2answers
842 views

How can these GPS/GPRS bike tracking locks be so power saving?

I am really puzzled by how these GPS/GPRS, solar-powered bicycle locks seem to be running on very little power. They are fitted with a tiny solar panel. As you may know, these locks are popular these ...
2
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3answers
114 views

1-11 Hz to DC voltage signal

I'm doing an internship where we are connecting all kind of sensors on a CAN-network for an automated datagathering. There is one sensor that sends a 50% duty cycle frequency signal between 1 and 11 ...
1
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1answer
125 views

Oscilloscope stop getting data

I have a Rigol DS1000Z, and I'm using it to sort of log data. I have a wavelength tunable laser that creates an electrical pulse (start of pulse is start of sweep, end of pulse is end of sweep), and ...
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2answers
265 views

Current measurement in 12V LED circuit

simulate this circuit – Schematic created using CircuitLab Just purchased an Omega data logger, i'm very concerned with the readings I am getting out of it. As a start I just want to make sure ...
0
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1answer
35 views

Reverse Polarity Protection for DAQ box

Firstly, I am a ME seeking advice from EE's. I have a Quadvolt voltage data acquisition box from Omega (P/N: OM-CP-QUADVOLT-30V) http://www.omega.com/pptst/OM-CP-QUADVOLT.html, that I intend on using ...
1
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1answer
60 views

Interpretation of ouput

I have everything in place to log my consumption of elektricity and water, but have no success to log my gas consumption. My gas meter is an old mechanical meter with rotating numeric wheels. There is ...
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2answers
306 views

Lowest possible latency, 1-way RF transmission

I am working on a wireless telemetry project with a bit of a twist. I have a CC3220 inside of a rotating shaft connected to an AMS board collecting pitch readings from a magnet mounted inside. The ...
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2answers
50 views

Low power voltage step down for datalogging

I am trying to design a datalogger that runs off battery power and am trying to maximise runtime. The logger is infrequently (every 5 minutes) logging 0-30V analog and digital signals. One of the ...
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2answers
123 views

Measuring computer power usage

I am trying to optimize the power usage of a custom application (C#) running on an embedded computer (Intel i7, Windows 7). To do so, I am measuring the current that the system requires while running ...
2
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4answers
122 views

Are there chips encoded with fixed 8bit values?

I am assembling a few data acquisition fixtures and would like my software to be able to identify the fixtures programatically. I have a breadboard that I can use for basic circuits. The DUT signals ...
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1answer
731 views

IEPE Circuit Model

Do anybody have a circuit model of a IEPE Loop? I am requiring to model the response of IEPE loops for checking how the frequency response of a sensor can or cannot be degraded under changes on the ...
1
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1answer
106 views

Will Open Collector Output of 0~12V damage 0~5V input DAQ?

In my lab configuration, I am using open-collector with 2K Ohm pull-up resistor to 12V. The data aquisition card I am using is from national instrument. If I look at the Low and High voltage of open ...
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3answers
137 views

Hacking characters in custom LCDs [closed]

Say I have a device/instrument that has custom LCD for display with mix of text and graphic/icon on the corners. I want to log the values and feed it to the computer or say automate a response when ...
-1
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2answers
906 views

Level shifter circuit

I found this level shifting circuit online. When I simulated this on Multisim, it works fine, but how do I find the relationship between the output and the input. Here is the circuit.
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0answers
712 views

3 Phase power logger with ADC and Raspberry Pi

I am building a 3 phase power logger with the ability to measure 3-phase AC and 2 DC inputs as well for a final year project. A typical application would be measuring a small inverter for a solar ...
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2answers
103 views

Data logging over 5km range [closed]

I am working on a project of designing a system for leak detection in pipelines. I want to monitor pressure/flow in both endings of a 5km long pipe and acoustic emissions onto some crucial points of ...
0
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1answer
824 views

What is the best way to store date & time in eeprom using less bit possible?

I want to save data associated to a timestamp (like a datalogger) along a month, in a very small memory (probably only 1024bytes). I was thinking using epoch time to save timestamp but it already take ...
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0answers
930 views

STM32F401 SDIO with DMA

Please need help in: Do somebody have a a working code that writes to sd card via sdio using FatFs and DMA?( data logger) In a poling mode (without DMA) I am writing to .bin file and getting error ...
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1answer
56 views

Advice re. 4-20mA signal readouts

Apologies if this is a very low-level question, but I have no experience in this field and don't know where to start. I'm looking to borrow an accurate pressure gauge from GE: https://www....
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3answers
150 views

Data logger component identification

I'm trying to reverse engineer an aging datalogger. Before building my schematic, I would like to identify all the components. There is one component that I can't seem to identify after many hours ...
-1
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1answer
52 views

secured centralized logs collection through USB flash drives

I want to centralize logs collection from many different computers on which I can only plug USB flash drives. This is the only authorized device for some security reasons (even if a USB flash drive ...
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3answers
3k views

ENC28j60 ethernet interfacing with PIC18F4520 help needed

I am a newbie to ethernet controller. I need to use ethernet controller to send sensor data to our server using http get method. I went through ENC28j60 documentation and microchip's TCP/IP stack as ...
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1answer
403 views

Cancellling Out the Effect of Constant Gravitational Acceleration in a Datalogger

In a design that records not only accelerometer readings (X + Y + Z) but also gyroscopic readings (X + Y + Z) how is it possible to remove the accelerometer readings caused by gravity? I have found ...
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2answers
308 views

DMM Hack to Log Amps: [closed]

I have a spare DMM (Digital MultiMeter) that I would like to use to log the displayed data at 1 sample/sec. What would be the least expensive way to mod the DMM to log the data that appears on the ...
6
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1answer
456 views

GPS Power consumption MTK3339 vs SirfIII for periodic logging application

I am currently working on redesigning a SirfIII based battery operated GPS logger. A MTK3339 based GPS module has been selected due to overall (advertised) performance. The GPS logger uses a ...
0
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1answer
2k views

STM32F407VG-Discovery USB Limits

I'm currently in the middle of my 3rd year university project and am trying to convert the STM Discovery board into a data-logger. I've already found this site, which demo's how to make a GPS data-...
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1answer
2k views

Reading Current Transformer using Arduino

I want to be able to read current using an Arduino. I have purchased a Hobut Current Transformer from Farnell (Element14): http://uk.farnell.com/hobut/ctscmicro19-150-5-t/transformer-current-150a-1-...
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7answers
2k views

How can I collect data from a hydrophone?

I want to collect data from a hydrophone over a period of days or weeks. A desired typical collection period would be 30 days. Hydrophones are a piezo-electric transducer that output millivolts (...
0
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1answer
66 views

USB datalogger ground read isn't zero volts

Im using NI DAQ USB 6008 datalogger. When I connect A0 (or 1,2 etc..) to ground in single-ended mode it gives 6 mV. Shouldn't it be 0 mV? Is it corrupted or normal?
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2answers
1k views

Problems amplifying mV potential differences

I am trying to help my daughter with her science fair project of measuring efficiency of different types of household lighting in various heating conditions. Since she doesn't have the electronics ...
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1answer
1k views

Proximity detection with rfid

I am wondering if anybody has ideas for developing an (Arduino?) system that would use RFID to log occurrences when two people are in close proximity to each other (e.g., <= 1 meter). Ideally, I ...
0
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1answer
119 views

uC Datalogger to GUI for dataprocessing

So I looked around electronics.stackexchange for this one and here is where I landed: What type of USB Protocol for Datalogger Basically, I would like to sample a voltage (specifically, from a photo ...
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4answers
5k views

What is considered low or high frequency?

I've been reading some guides and papers on data acquisition and often times on the subject of measuring frequency they will simply say For low-frequency signals, it is sufficient to use one ...
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2answers
114 views

Best elements for downhole and high temperature circuits

I want to design a data-logger with PIC MCUs. This data-logger is going to work in chamber in the oil wells in the depth o 500 meters. and it is going to record temperature and pressure for 20 hours. ...
3
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1answer
1k views

How to capture values displayed on 16x2 LCD

I have an inexpensive in-line DC Wattmeter that I often use to measure yield from Solar Panels / Modules and other energy sources with reasonable accuracy and resolution. It has a 16x2 LCD display (...