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Gadget Freak Case 102: Rob's Watching His Truck's Diet

By Design News Staff -- Design News, May 14, 2007

Robert Kwiatkowski designs and deploys data logging systems for Condition Based Maintenance on aircraft carriers. With gasoline prices soaring, he wanted to improve the fuel efficiency of his thirsty truck. As a first step, he's doing some data logging via the OBDII port using this simple interface, a laptop computer and Windmill, a data acquisition application. With post-processing via MS Excel, he can monitor mpg in real time and compare fuels, additives and driving patterns to optimize his mp$ (miles/dollar).

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Amt Part Description

 		Allied Part #
1 750 Ohm 895-0881
2 2.7 k Ohm 296-6320
5 4.7 k Ohm 832-1393
3 10 k Ohm 832-1118
1 47 k Ohm 296-2182
1 100 k Ohm 832-1110
1 0.01 uF 507-0326
1 0.1 uF 881-0478
1 0.47 uF 613-0497
2 27 pF 881-5122
3 1N4148 935-0242
2 2N3904 (NPN) 431-0406
3 2N3906 (PNP) 568-0293
1 +5V regulator, 78L05ACP (T0-92) 568-0965
1 IC Socket, DIP8 900-0004
1 3.579545 Mhz crystal 895-0675
1 DB9RA/M connector 720-6170
1 DB25RA/F connector 810-0091
1 LED 5 mm, red 679-9981
1 DB25M to DB9F cable (1 ft) 0088-1
1 ELM 320 chip
1 Laptop with Rs-232 port
1 J1962M to DB9F Cable (OBDII interface)

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