Data Acquisition& Logging System UsingAT89c51
By : Abbas Raza jgen_17@yahoo.com
This is actually a temperature logging System. Here 8 temperature sensors areconnected(4 shown in diagram for simplicity). values of all the sensors are sentserially by AT89C51 to pc. Software "DAQ System " takes these valuesand 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 . whentemperature of some sensor increases beyond set point ,the heater connected tocontroller (specific for that sensor) will be turned OFF( ON in opposite case ).Highlimit and low limits are for alarm. when temperature goes above high limit orbelow low limit the alarm will be turned on.
other features coming soon in DAQ 1.1 version including labview portion
Figure1: GUIInterface for DAQ System
Figure 2: Circuit Diagram for DAQ System
The source code for the project is written in Visual Basic and C-language. You can download the vb-code , c-code, schematic, and if you don't have a cross compiler then you can directly burn the HEX file on to your chip DAQ System.zip