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Hacking up Honda's ECU
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PostPosted: Thu Jun 02, 2011 9:22 pm 
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Joined: Wed Jul 28, 2010 5:23 pm
Posts: 52
Get a powered USB hub (without the power supply) and get a 7805 5V regulator from Radio Shack and make the 5V supply input for the hub...+12V in from the switched 12V in the car (and ground) and the 5V voltage regulator output will drive all of the devices connected to the hub. I ran a single 10 foot USB extension cable to make sure that I didn't have any problems (and also so I could be outside of the car when I get to the dyno) and I have never had an issue. The 7805 will supply 5V @ >1.2A...a three port hub needs 500mA max per port...works out perfectly.

It is a handful of parts and it is really easy to build!

Kirk


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PostPosted: Sat Jun 04, 2011 7:54 am 
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Joined: Wed Jun 02, 2010 8:15 am
Posts: 106
now that i`m thinking about it I could use these cheap lighter 5v usb thingies tear it apart and use that as a voltage regulator


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PostPosted: Sat Jun 04, 2011 6:42 pm 
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Joined: Wed Jul 28, 2010 5:23 pm
Posts: 52
sophocha wrote:
now that i`m thinking about it I could use these cheap lighter 5v usb thingies tear it apart and use that as a voltage regulator


BINGO! :mrgreen:

Kirk


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