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So, I'm just going to port the blog entry over to this account to help spread the idea/word. Here is the link on these forums: http://www.hhoforums.com/entry.php?4-Arduino-Controlled-PWM

I found some time to get this completed (minus the display). I have successfully retrofitted the PWM to the throttle signal plus mapped RPM and engine load. Lots of other things I could map it to as...

Added a current carrier for detecting amp draw, wrote a simple test to limit current to 12.5 amps and threw in a cheap Radioshack project box.
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Should also help provide better average results as running a reactor at 10 or more amp draw at idle (when there is little or no load on the engine) is not going to save you anything.

I will be posting this as a kit some time within the next 8 - 12 weeks (depending on my work schedule). The current model is getting a big upgrade with current sensing and ability to handle 60A...

I completed the bench test against the reactor @12A. Unit ran at room temperature and very smoothly at 173Hz from 0-100% duty cycle. I need to finish my stainless bubbler then it's install time.

I've got a rev 1 PCB designed now and am working on the case. This will be a pretty darn rigid one and I made sure to include some pretty large wire pads (up to 10 AWG) and did a partial override to...

It's an N-channel MOSFET box that includes the voltage regulator for the gates. Pretty simple really. The difficulty is putting it all together in such a small form factor. This one is good for 25A...

This is my latest power mosfet prototype. What this box does is simply control the current to the drain (in this case it's the reactor) based on a microcontroller 5V PWM signal. Since a...

Got my OBD-II to Arduino setup working as desired with proper prototype shield, custom box, 3.3v OLED mounted in a cheap gauge pod and proper Molex connectors to sum it up. I have easy access to most...

Solenoids are a great idea. Really easy to activate via the controller too. Torque curve on my turbo boxer motor can be read from the OBDII data so that should be easy. I will probably experiment...

I think RPM would be best unless you have a really crazy fast hydrogen generator. Most generators won't respond fast enough to provide a really accurate ratio. It is, however, a lot better than...

Yep, you could use the analog voltage signal as an analog input to drive the PWM input.

Hondata? I looked into that mod for my Civic a few years ago. Definitely helpful for re-mapping.

You would need pin outs to be able to send analog signals to the microcontroller unit in order to...

Well, for me, I just use an OpenPort 2.0 to put a custom tune on. Pretty easy since its a Subaru.. As far as ECU tech is concerned now is a great time to get open source hardware such as Raspberry Pi...

Man, I keep forgetting to manually subscribe to these threads I post in. Sorry guys!

Anyway, myold I am working on an Arduino (open source micro controller) based solution and am currently...

Yep, better yet it is MAP sensor based (0||5v). I will post details in a new thread once I get the time to complete the install. Not enough hobby time lately :(