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Get your kicks out of these automotive hobby projects

02 Mar 2016  | Cabe Atwell

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Tiny PIC Porsche Sport exhaust system controller

Tiny PIC Porsche Sport exhaust system controller

Figure 12: (Source:

This circuit was designed, programmed and constructed specifically for use on a Porsche. The designer wanted a convenient way to control the Sport Exhaust System on a 911. The Sport Exhaust System allows the driver to switch the tone of the exhaust from the quieter normal running sound to a much deeper, throatier roar. However, every time the vehicle is shut off, the system resets into wimp mode. This circuit forces the car into brawndo mode right at start-up. The PCB is controlled by a PIC 10F200. The PIC 10F series are great for tasks like this. They are phenomenally cheap, take up little space, have their own clock, and come with a surprising number of on-board features. When you need a little bit of logic and I/O, these things are great.

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