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-2
votes
2answers
80 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
votes
1answer
100 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 ...
1
vote
0answers
48 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 ...
0
votes
1answer
39 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....
1
vote
3answers
106 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
votes
1answer
41 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 ...
0
votes
3answers
323 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 ...
1
vote
1answer
63 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 ...
0
votes
2answers
119 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 ...
4
votes
1answer
161 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
votes
1answer
135 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-...
0
votes
1answer
87 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-...
4
votes
7answers
439 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
votes
1answer
50 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?
2
votes
2answers
483 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 ...
0
votes
1answer
308 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
votes
1answer
76 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 ...
0
votes
4answers
839 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 ...
1
vote
2answers
91 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
votes
1answer
255 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 (...
3
votes
2answers
697 views

Continuously log data from an oscilloscope

I have a pin which is being toggled every 100ms by an MCU. I need to plot a graph which consists of the variation from the desired interval . That is the number of times it moved away and was toggled ...
1
vote
2answers
125 views

Is it safe to not power this USB to I2C chip when USB isn't plugged in?

I am working with someone on a data logger based on an MSP430. Since it operates on battery power, we want the device to use as little power as possible. We are planning to use this chip (FT201X) to ...
5
votes
1answer
908 views

SD card access slows down with many files

I'm working on a data logger application using a MSP430F5529 running at 2 MHz and a SD card using FatFs. The SPI interface is already running at maximum frequency. However I am seeing very erratic ...
1
vote
2answers
204 views

Collecting data from GSM devices

this is my first question on electronics, so I hope I will get it right. :) GSM and GPS are topics which are quite new to me, but I will try to be as clear as I can. Is it possible to collect data ...
2
votes
1answer
99 views

Hooking up a load cell to a temperature logger

I have an idea for little project where I want to log weight changes (standalone) on a bee hive, preferably low-cost. Now there's a lot of cheap temperature loggers on the market, for example this ...
2
votes
1answer
243 views

How do you correlate voltage output with these values that I have collected?

I'm using a "Logomatic v2 Serial SD Datalogger" to measure the voltage output of this piezo-resistive sensor, "Force Sensitive Resistor - Square." The values are logged in a .txt file in a microSD. (I ...
2
votes
1answer
370 views

PIC : Reading and Writing to External Flash M25PE80 using pic18f67k22 controller

I have PIC18F67K22 controller. I am making data logging system. I am using M25PE80 external flash for storing data. I am storing session wise data in external flash. Also I am storing start and stop ...
-1
votes
1answer
101 views

need a 3-channel data logger [duplicate]

The second link shown below leads to the schematic for measuring the position of a laser beam by using Quadrant PSD(Pg.No 45). I am trying to build a similar circuit. The datasheet of the quadrant ...
-2
votes
1answer
262 views

How to search date wise in flash memory using microcontroller?

I am developing a data logger in which I am using 8 MB of flash memory to store the sensor data with date and time. I am using RF interface to transfer that data to PC. I am planning to have PC ...
3
votes
2answers
405 views

PIC Microchip interface with PC

I have been using USART for interfacing PICs to my PC for datalogging. The problem is that now serial ports are not very common and often you need a USB-Serial adapters which do not always work or ...
1
vote
3answers
516 views

Logging the output from a solar cell

I am trying to create a small low cost circuit that will allow me to log the output of a solar cell over the course of a month as a student project. Currently I have a 5V Silicon PV cell and am ...
1
vote
3answers
141 views

Embedded system-current draw logging

I have an embedded application that wakes up every 15 minutes and performs some specific function for a period of two minutes. I need to log the current consumption of this specific function on the ...
4
votes
1answer
2k views

Corrupted files generated by Arduino with SD library. How to avoid that?

I have a sketch that runs on an Arduino Ethernet (that comes with an SD card reader and, of course, an Ethernet interface). There is a unique place in this sketch where I write to a file on the SD ...
2
votes
3answers
291 views

Intersection Turning Movement counts

Civil Traffic Engineers have a perpetual data gathering problem. They need intersection turning movement counts to do their studies. This has historically been a manual task. Someone sits by the ...
1
vote
2answers
345 views

Fast sensor readings

I am developing a data logger for use in high schools like ( http://www.pasco.com ). The main difference is that mine is primary supposed to be used with an iPad. I have a connection between a micro ...
16
votes
4answers
6k views

Low power micro-SD card storage

We are building a low-power data logger based upon the ATmega328P, in order to make use of the Arduino boot loader and IDE, etc. Ideally power consumption should be less than 0.3mA @ 3.3V to get ...
5
votes
3answers
736 views

Sync video with data

When I have a datalogger and I want to sync a video-file to the recording, what would be an easy method? The logger and the camera both have an internal clock, but they may not be set exactly to the ...
1
vote
3answers
1k views

What's a good sensor for measuring high voltages

I want to do datalogging on solar strings in the 600V range +-100V. Would prefer accuracy close to 1%.
1
vote
1answer
1k views

How to monitor / log / record / store voltage reading across various connectors of a PC power supply unit ( PSU )

I'm searching for a way to detect over-/undervoltages across the PSU connectors so that i can have a better chance of finding causes for HW failures/errors . Best way i could think of was logging the ...
2
votes
2answers
135 views

Monitoring software for embedded application

I'm looking for a Windows application to collect data to a host PC from an embedded application (PIC microcontroller). The communication between host and embedded application is via Ethernet. It ...
4
votes
1answer
355 views

How to sync sensor data

Suppose I have multiple dataloggers receiving sensor data, how can I sync those signals afterwards? The most obvious way would be adding timestamps to the data, but they have independant clocks, so I ...
4
votes
2answers
692 views

Can USB host controllers be used for device identification?

Does any USB host device provides any unique IDs which are available from USB controller to device? At software side, I can get the vendor ID (along with other hardware identification data such as ...
3
votes
3answers
161 views

Can I log current using a voltage input and V=IR

I have a sensor which produces a current proportional to the variable it is sensing. My data logger only accepts input as a varying voltage, which it then encodes in 8 bits (scaled linearly to volts). ...
5
votes
5answers
2k views

Temperature logging setup for refrigerator

I've been having some issues with my refrigerator lately, and so I've been imagining some kind of temperature logging system. I want it to log the temperature every 5(?) seconds, door open/close ...
3
votes
4answers
3k views

Hackable exercise bicycle computer?

This might sound a bit weird, but does anybody here know of a exercise bicycle that is hackable? What I would like to do is to connect it to a PC (don't care how, usb, parallel port, serial...) to ...
3
votes
3answers
900 views

Logomatic v2 serial SD Datalogger issues

Hi i bought this data logger a few weeks ago, http://www.littlebirdelectronics.com/products/Logomatic-v2-Serial-SD-Datalogger.html I've been having some trouble with it. I read the data sheet and I'...
4
votes
2answers
1k views

AVR Stick Data Logger Usage

Has anyone used this data logger (or similar) with v-usb to collect data? http://www.sparkfun.com/commerce/product_info.php?products_id=9147 If so, what is the maximum times per second voltage data ...