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Tire Pressure Sensor
The pressure is determined by the formula, <m>P=0.145*MPX5700DP-ND|0-101.5PSI Pressure sensor|[[http://www.digikey.ca/|Digikey]]|$16| | |2 Ft 1/4ID hose|Home Hardware|$1.50| | |2 crimp style hose clamps|Home Hardware|$1.60| | |Barbed hose connector|Home Hardware|$1.19| | |Compression fitting|Home Hardware|$1.95| | |Street Elbow|Home Hardware|$2.29| | |Barbed hose connector|Home Hardware|$1.19| | |Click on air chuck for valve stem |Princess Auto|$3| | |1/8NPT tank valve|Princess Auto|$2.50| | Total ||| <php>print 16+17;</php> | === Development === Here are the {{:projects:electronics:excel_calculations.pdf|calculations I did for the module using a spreadsheet to graph the transfer function, then working out the math to something which can be easily done in assembly.
