The Circuit Specialists DM620 Data Logger Digital Multimeter (DMM) is a versatile portable unit capable of monitoring and storing multiple types of electrical data. This stored data can then be displayed on the built in LCD screen or exported to a PC via the USB port. The collected data can be displayed in several different formats such as text data or in graphical format.
Due to the wide variety of portable devices in use today, battery characterization and testing is an ideal use for the DM620. I will describe a simple method for determining the capacity of a typical sealed lead acid (SLA) battery used in
emergency lighting applications. For optimum operation, the battery should be discharged at a 0.1C rate or less.
This means that we should test it with a load current equal to or less than 1/10 of the Amp/hr. rating of the battery. The
battery under test is a 12 volt 9 Amp/hr. SLA battery, so we will set up the test at a discharge current of 0.9 Amps. Ideally this should be performed using an electronic load (such as the CSI3711) to provide a constant current discharge. Read the rest of this entry »
The Raspberry Pi solar data logger project is now live and is the latest version of our previous data logging systems using Arduino and Android + IOIO board projects.
The data is used on a custom reporting website onhome.briandorey.com and also on Android and iPad tablet apps.
The Raspberry Pi is used as a data processing and uploading system which pulls data from the following sensors and then uploads to a web server via HTTP GET.
Pi Solar Data Logger - [Link]
This project is about building a PC-based temperature and relative humidity logger using the chipKIT Uno32 board and the DHT11 sensor. The DHT11 sensor is directly plugged into four I/O pins of the Uno32 board and is powered through the I/O pins. This project is probably an easiest way to setup an ambient room monitoring system for a server room. The Uno32 reads the temperature and relative humidity from the DHT11 sensor at preset interval and sends the data to PC through the USB-UART interface. A PC application is developed using the open-source Processing programming platform to log data onto an ASCII file. The PC application also displays the real-time temperature and relative humidity on computer screen.
PC based data logger using chipKIT Uno32 – [Link]
The AVR Stick is a simple data logging device that instantiates itself as an HID keyboard and reports the voltages, along with a ‘timestamp,’ from two pins on an ATtiny85. The device uses open source firmware availabe from Objective Development (http://www.obdev.at/vusb/) called V-USB to implement the USB 1.1 standard. The code that runs the application was based on the EasyLogger example application from Objective development.
AVR Stick – A simple USB data logging device - [Link]
Earlier this year I have bought on the flea market a used car GPS system, an Amstrad gp1000.
(Un)fortunately it was so badly damaged, that it could not be repaired, so I thought I would reuse some parts from it. Then came the idea of building a portable GPS logger system.
The receiver runs perfectly from 3.3V, based on the NMEA V2. 2, 9600, 8, N, 1 protocol with a refresh rate of up to 1Hz and 16 channels. I’ve also reused the built in Li-polymer 1500mAh battery, some passive parts and connectors.
GPS to SD card data logger and compass - [Link]
This project describes an easy and inexpensive way of adding a digital thermometer and data logging feature to a PC. It involves a PIC microcontroller that gets the surrounding temperature information from the Microchip MCP9701 sensor, and sends it to a PC through an USB-UART interface. The USB port of the PC is also used to power the device. The open-source Processing programming platform is used to develop a PC application that displays the temperature in a graphics window on the computer screen. The PC application also records the temperature samples plus date and time stamps on an ASCII file.
Low cost temperature data logger using PIC and Processing - [Link]
Aim of this project is to present a way to store a large quantity of data into microSD card in files with FAT32 format. Here, ATmega32 is used for data collection and microSD interface. The data is received from in-build 8-channel ADC of ATmega32. One channel is used for reading temperature from LM35 sensor and remaining channels are used for simply reading voltages and storing them.
microSD ATmega32 Data-Logger - [Link]
It is a very simple data logger project based on PIC12F683 microcontroller. The microcontroller reads temperature values from a temperature sensor on a regular interval basis and stores them into its internal EEPROM memory. The recorded temperatures can be later transferred to a PC through serial interface. I originally published this project on electronics-lab.com last summer. I thought this could be a very good learning project for beginners, and so I am posting it here for Embedded Lab’s readers too.
A Beginner’s data logger project using PIC12F683 microcontroller – [Link]
This page describes the assembly, programming and use of a device that constantly monitors heart rate and stores the data on an SD memory card. The data can be read from the card, imported into MS Excel (or other programs) for graphing or other analysis. I use this device to track my effort level on bike rides.
Arduino heart rate data logger – [Link]