[Diy_efi]clarify: function generator for shutterwheel

[Ashley Evans]

I was thinking this could be easily done with a PIC Microcontroller.

Ashley

Torbj?rn Forsman wrote:
> I once built a such waveform generator by using a presettable binary 
> counter to set the number of cycles between the pauses, some logic 
> gates and a final stage with an op amplifier and a modem line 
> transformer (in my case, an inductive pickup was to be simulated). The 
> final stage is of course not needed if a hall sensor with open 
> collector output is to be simulated. The input signal for this circuit 
> was taken from a standard tone generator.
>
> /Torbj?rn Forsman
>
> Phil wrote:
>> some clarification about what I need to simulate the crank sig for VW 
>> ABA eng, OBD I ECM: a 60 cycle sequence with the last 2 cycles off; 
>> a  3V square wave is sufficient; and I need to be able to vary the 
>> frequency from 6oo-7500Hz (individual square wave cycles)  ----- 
>> Original Message ----- From: "Adam Wade" <espresso_doppio at yahoo.com>
>> To: <diy_efi at diy-efi.org>
>> Sent: Wednesday, December 28, 2005 9:15 AM
>> Subject: Re: [Diy_efi] function generator for shutterwheel
>>
>>
>>> --- Bill Shaw <b.shaw at comcast.net> wrote:
>>>
>>>> Analog Devices makes  some function generator chips.
>>>> Here's a link to an app note with schematics....
>>>
>>>
>>> Unfortunately, mail programs peark up that cumbersome
>>> URL.  Since you don't really care it came from a
>>> particular search, or where the search was done, you
>>> might find it easier to just click on this link, which
>>> should be intact...
>>>
>>> <http://www.analog.com/UploadedFiles/Application_Notes/724445866AN285.pdf> 
>>>
>>>
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>>>
>>>
>>>
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>>
>>
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