DIY_EFI Digest             Friday, 26 April 1996       Volume 01 : Number 121

In this issue:

	RE: Looking for MC3484 peak/hold injector drivers
	Re: Knock sensor display project.

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From: cmorris@xxx.com (Charles)
Date: Thu, 25 Apr 1996 18:09:07 -0700
Subject: RE: Looking for MC3484 peak/hold injector drivers

You wrote: 

>On the EFI332 list there have been group purchases for various ICs. 

    Do you have the address? What is this, a Motorola 68332 group?

> Reaching 50 pieces shouldn't be too hard, especially if there are 
some V8 applications out there.  And at 50 pieces or more, the price 
might even be reasonable.  How much does Cherry want?

    I didn't ask. Even at $4 each that's a lot of money! But a group 
purchase might still be a good idea...

>PS.  I still say use a power MOSFET (and an external ballast resistor 
if using low resistance injectors).  Eliminates the dependance on these 
damn custom ICs.

    Thanks for the input, Bryan. The advantage to the peak-hold driver 
(as opposed to a simple switch with a ballast resistor) is a much 
faster opening and closing time. This becomes more important at small 
pulsewidths...better repeatability, larger dynamic range. (Problem is 
the RL time constant).

- -Charles

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From: Craig Pugsley <c.pugsley@xxx.au>
Date: Fri, 26 Apr 1996 12:27:50 +1000 (EST)
Subject: Re: Knock sensor display project.

> 
> > 
> > The Australian electronics magazine 'Silicon Chip' has just published a
> > project which applies filtering to a knock sensor signal and displays
> > the severity of the knock on a bar graph display
> > 
> > When I buy the magazine I will post info on where you can buy a kit (for
> > the benefit of those outside Australia without access to the magazine).
> > 
> > Craig.
> > 
> Craig,
> Have you had any luck in obtaining the article. Sounds like an interesting
> project.    Frank Parker
> 
> 

Yes, I have some details.
You can get a copy of the magazine for $Aus 10.00 (incl airmail).
The issue is SILICON CHIP, APRIL 1996 (vol 9 number 4)
You can order it by calling +612 9979 5644 & having your details (incl
credit card) ready (This number from the US is 011 612 9979 5644)
Their fax# is +612 9979 6503

You can buy a kit from Jaycar electronics.
catalog number KC5203 (Knock sensor kit)
Price $34.95 aus (~$26 us)
Phone number +612 743 6144
Fax number +612 743 2066

Jaycar also have a (simple) "Programmable electronic ignition computer"
This was in SILICON CHIP magazine March 1996
Jaycar catalog number KC5202
Price $65.00 aus

Neither of these have web or email yet.
Both of them are reputable companies.

Hope this helps,
Craig.
pugsley@xxx.au

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End of DIY_EFI Digest V1 #121
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