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PC Applications Although you can use a terminal program (eg hyperterminal) to calibrate and download barographs it's a bit of a pain. Easier to have a simple program to do this for you. I have written the following three QBasic programs: baro.bas Downloads barographs calib.bas Takes pressure reading, allows you to calibrate altimeter download.bas Sends initial settings to eeprom. Need to run once the hardware is up and running. They're not pretty but do the job. If you can't get hold of QBasic (used to come with MS-DOS) then there are probably some compatible basics floating around the internet for free. Failing that, easy enough to recode in your favourite language! Another useful program I wrote is of a more general nature and only of interest if you use floating point in your own PIC code: convert.bas Converts to and from Microchip 24 bit floating point These can be found in the ffc.zip archive available for download in the software section. Back to top ...