Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [datalogger]

98 questions
19
votes
4 answers

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 around 4 months life on a single AA battery. Sensor…
geometrikal
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9
votes
5 answers

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 microcontroller to enable the GPS receiver in a periodic…
optronik
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7
votes
1 answer

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 performance: even with an empty SD card, file…
Renan
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5
votes
3 answers

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 same time, so I cannot use those timestamps to…
Maestro
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5
votes
5 answers

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 events, and compressor start/stop. Having little to…
Christian Wattengård
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5
votes
2 answers

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 for 101ms or 98 ms and so on. I tried to do it…
user2578666
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4
votes
1 answer

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 card, which basically looks like this: char…
etuardu
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4
votes
1 answer

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 (VS1053) plus a bunch of additional components. At…
PeppeA82
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4
votes
1 answer

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 can't really sync the signals, even with those…
Maestro
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4
votes
2 answers

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 BIOS and hard drive IDs), but looking for the way to…
kagali-san
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4
votes
7 answers

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 (thousandths of a volt). A response from a hydrophone…
Tyler Durden
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4
votes
2 answers

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 can be sent at HID messages? (I can't understand…
Evs
3
votes
0 answers

Data Logging Medium: SD Card or USB

I am on a project that requires data logging and I am using an STM32F1 MCU. The amount of data is around 400 bytes per log entry. One of the environmental conditions of the deployment is vibration. It will be on a car with a stiff suspension…
squieler
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3
votes
2 answers

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 have problems with drivers. I'm not a big fan of…
big_mu5
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3
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3 answers

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've powered it up (using a 2Gb Sandisk micro sd card…
Shaun
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