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Gadget Freak Case 102: Rob's Watching His Truck's Diet
By Design News Staff -- Design News, May 13, 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).
Download the build instructions | View Parts List | Post a Comment
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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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Download Build Instructions |
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Talkback
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The link to the Windmill software is wrong in the pdf file - it should end in "uk"...
- 2007-21-6 22:26:23 EDT -
I am not sure what software you are looking for, windmill or...
- 2007-25-5 11:30:30 EDT -
To time the injector pulse you would need several variables, the short term pulse, long term...
- 2007-25-5 11:29:34 EDT -
That link for software leads to a LARGE amount of software. Which is what we need for this...
- 2007-22-5 05:44:25 EDT -
How about just "timing" injector pulse width, then the...
- 2007-14-5 13:37:33 EDT
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