This is a Data Acquisition & Logging System Using AT89c51. It is actually a temperature logging System. Here 8 temperature sensors are connected(4 shown in diagram for simplicity). values of all the sensors are sent serially by AT89C51 to pc. Software “DAQ System ” takes these values and show them on its front panel, and also logs them to the data base “daq.mdb” .we can set some parameters like set point , low limit ,and high limit . when temperature of some sensor increases beyond set point ,the heater connected to controller (specific for that sensor) will be turned OFF( ON in opposite case ).High limit and low limits are for alarm. when temperature goes above high limit or below low limit the alarm will be turned on.
Data Acquisition System - [Link]
This is a Data logger to save values from a tipping-bucket rain gauge.It consist of on-board 4mBit (512kB) Dataflash is used to store the values. Readout to the Windows download software developed for this project takes place via serial port (RS232).
AVR Butterfly Logger - [Link]
This is a weather station with a build-in webserver. The system is modular design you can either build a pure Ethernet weather station or an Ethenet weather station with an additional local LCD display.The weather station has two temperature sensors(LM335) and one MPX4115A which an absolute air pressure sensor from Motorola/Freescale both sensors controled by atmega88/168.
Data Acquisition System - [Link]
This is an infrared remote control receiver for Arduino.It woks fine with any RC5 format remote control.The received RC5 code will be send to the serial port to be read on the serial console hyperterminal on windows at 9600 Baud-8-N-1.
Infrared remote control receiver for Arduino - [Link]
Many thermostat projects often requires some sort of temperature and humidity sensor.Here is how to connecting the SHT15 to the Arduino.The design is pretty simple.The data and sck lines each goto a digital input/output on the Arduino and the VCC goes to +5V.
Ardunio and the SHT15 - [Link]
This is tutorial how to interfacing NTC temperature sensor with Arduino.Just a few electronic components such NTC temperature sensor, 1kΩ resistor and a couple of wires you can measure the temperature with Arduino.
Interfacing NTC temperature sensor with Arduino - [Link]
Imagine you are on a shooting range and you want to improve yourshooting skills on a moving target, but the target can’t move. What doyou do? You could for example count the seconds and imagine that the target moves, but this is not a particularly good and accurate solution.The shooting timer provides an audible visualization of a moving target that helps you concentrate and focus on the shooting and not on timekeeping.The shooting timer is a rather simple construction preprogrammed with three types of shooting categories; 25 meter standard pistol, 25 meter fine pistol and terrain pistol. Each category consists of up to three disciplines.This project uses PIC12F675 and internal RC oscillator which is calibrated to be accurate.
Shooting timer - [Link]
The device used for measuring daily insolation has been developed. The device was built with a PIC18F458 and the 128MB Multimedia Memory Card, MMC. The solar radiation is measured by a calculator solar cell. The PIC chip interfaces the MMC using SPI mode. The interval between samples is set to one minute. The firmware detects the memory card, assignes the file name and begins recording automatically. The LCD displays the file name, current sample and real-time ADC data.
PIC18F458 based Solar Recorder - [Link]
This is Atmel Atmega8535 microcontroller based digital bule clock project.The main idea behind this project was to make Christmas gifts for friends and family that would be somewhat useful. A clock was chosen simply because it is something that everyone uses and it would be relatively easy to complete. Also, a big limiting factor was the project was started only 40 days before Christmas
Digital Blue Clock - [Link]