[Diy_efi] Measuring Pulse Width/Duty Cycle of an Injector?

[Marcello A. Belloli]

Chris,
     In regards to your side note:  The mod'd Pulse Width Meter Schematic
opened easily with Eagle 4.11.  So perhaps that is your answer.  And
everything seems to be displayed, and annotated correctly.
  Marcello


> I think that code for the 16F877 will run on the 18F452 without changes.
> To
> go from the 16F876 to the 877 is just different pin assignments IIRC. I
> has
> been a while since I looked at this though so I might be mistaken...
>
> As a side note, does anyone know what program the schematic is for? It
> doesn't seem to be Protel, PSpice or CircuitMaker.
>
> Chris
>
>>No worries t,
>>     I will check it out.  I am so glad to her something positive.  I
>>would love to look at the code.  I'm sure I could take anything for
>>the 16f and use it will a little modification on the 18f452.  Thanks,
>> Marcello
>>
>>
>>
>>> Marcello
>>> Sorry for the late post on this.
>>> Someone inquired as to the accuracy of the posted pulse width meters.
>>> The one I posted "PWMETER" that used a 16f876 counts 1 us clock pulses,
>>> so I think it will provide the accuracy you need and then some.
>>>
>>>
>>> t
>>> -----Original Message-----
>>> From: diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org]
>>> On Behalf Of Marcello A. Belloli
>>> Sent: Tuesday, May 24, 2005 7:11 AM
>>> To: diy_efi at diy-efi.org
>>> Subject: RE: [Diy_efi] Measuring Pulse Width/Duty Cycle of an Injector?
>>>
>>> Honda Acura OBD 0 cars used a system of Peak and pulse width modulate.
>>> I
>>> am not sure if this was or is a bosch system.  I didn't know I was
>>> going
>>> to have to deal with these until I was halfway done with everything
>>> else.
>>> All I know is it sucks.  The later type used in OBD I cars just reduces
>>> the voltage.  And doesn't make my head hurt.
>>>
>>> Marcello
>>>
>>>
>>>
>
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