[Diy_efi] Intro

Tue Aug 16 14:37:13 UTC 2005

It would be interesting to see a photograph of how they mounted the LED and
sensor.

I have been told the cameras on formula one cars use microphones to listen
to the exhaust note to disply RPM on the TV display.

I looked at a nice cheap electret microphone from Panasonic that has good
performance
http://www.panasonic.com/industrial/components/pdf/em06_wm61_a_b_dne.pdf
that might be easier to install than an LED + photodiode. A frequency
counter could then be used to display the RPM.

Original Message:
-----------------
From:  don.broadus at exeloncorp.com
Date: Tue, 16 Aug 2005 08:47:24 -0500
To: diy_efi at diy-efi.org
Subject: RE: [Diy_efi] Intro

The guys that build Turbojet engines out of turbos do the same thing. Most
use an infrared LED and detector from a TV remote control. One site has the
Schematic, 

-----Original Message-----
From: diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org]
Sent: Tuesday, August 16, 2005 3:21 AM
To: hugh at sol.co.uk; diy_efi at diy-efi.org
Subject: RE: [Diy_efi] Intro

I did a turbo speed sensor for my car, ended
up using a visible (white) light LED and fast
sensor, can put pictures up on my web site if
I can find space or (dare I say it) even a torrent
on my private tracker ;-)

Regards from

Mike
Perth, Western Australia
VL Commodore Fuse Rail that wont warp or melt !
Twin tyres for most sedans
http://niche.iinet.net.au

At 03:40 PM 8/16/05, you wrote:
>Ian,
>
>Interesting tale.
>
>What kind of turbo RPM sensor is fitted to your car?
>
>Thanks
>
>Hugh
>
>Original Message:
>-----------------
>From: Ian Molton spyro at f2s.com
>Date: Mon, 15 Aug 2005 18:59:12 +0100
>To: diy_efi at diy-efi.org
>Subject: [Diy_efi] Intro
>
>
>Hey guys :)
>
>Well I'm not one to leave well alone - if it aint broke, fix it 'till it
>is, right?
>
>I've bought a Daihatsu Charade CX 1.0 Turbo diesel 3 cylinder.
>
>This car has NOTHING unusual under the hood. the engine has nothing more
>than a temperature sensor ;-)
>
>Well so far, I've almost rebuilt the car - the extensive rot at the rear
>has been replaced by shiny new plate, the rear wheelarches are both new
>panels, all is painted and undersealed. The front springs are both new,
>so are the rear brake lines, its got a complete new set of injector
nozzles.
>
>So, now the cars roadworthy again, its time to fiddle.
>
>I've already planned out the internal stuff - a PC in the radio slot 
>(already being built) and a whole load of USB bits and bobs including 2 
>cameras, usb audio, memory stick for storage, wifi, bt, DVB, GPS, etc.
>
>The audio will be a pair of gutted and rehoused labtec 385s (cheap, 
>sounds good)
>
>lastly, and what brought me here...
>
>Im planning to build an EMU, also a USB device.
>
>I've got a couple of EZ-USB chips, which will do for the computer side 
>of things, should be plenty fast enough.
>
>I've already discovered a few things I can sense - MAP, turbo spindle 
>speed, Oxygen, inlet air temp, fuel flow (how?), RPM (already electronic
>for the dash readout), among others.
>
>what would be really awesome would be to convert the thing to common 
>rail, but its an indirect injection engine, so I question how possible 
>that might be
>
>I assume knock sensors are pointless on diesels?
>
>So, some of the first questions are going to be:
>
>1) What sensors are available?
>1a) - that have calibration data / tables available?
>1b) - where from?
>2) What sensors can be used on a diesel?
>3) How do you fit them (ie. where - eg. how far down the exhaust 
>manifold should I stuff the oxy sensor)?
>4) are any commmon circuits available to drive sensors?
>
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