[Diy_efi] 555 Timer controlled EFI

[TheEthereal at gmx.net]

The flap-style AFM restricts the intake much more than any other MAF I'm
aware of. You don't specifically need a F-to-V converter, a low pass filter
set to the appropiate specs may suffice. Although it's not as elegant as a
555. I'm confused by now. What is better to drive the 555 injection, a
Voltage or a frequency?


> --- Urspr?ngliche Nachricht ---
> Von: ScottyGrover at aol.com
> An: diy_efi at diy-efi.org
> Betreff: Re: [Diy_efi] 555 Timer controlled EFI
> Datum: Sat, 21 Jan 2006 13:13:16 EST
> 
>  
> In a message dated 1/21/06 7:13:58 A.M. Pacific Standard Time,  
> kml_daniel at yahoo.com writes:
> 
> Hi 
> The 555 timer could be used as frequency to voltage converter i   could
> send 
> you a schematic of it, if you need 
> Kamal Daniel
> 
> 
> 
> 
> The F-to-V converter was my reply to the person wanting to use the  
> Mitsubishi MAF device. I am using a Datsun Flap-type AFM which has an
> antilog  
> CFM-to-Voltage curve; I am applying this to pin 5 of a 555 to linearize
> the  curve.  
> Then processing this signal for Intake air temp. and engine  (cylinder
> heat) 
> temp.; then passing this through a National Semi. A/D device;  hen with
> further 
> processing, this is applied to the input of a programmable  8-bit counter 
> which, through rotary counters, gates, and power transistors,  feeds the
> injectors.
> Scotty
> 

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