Sort of to do with EFI (more electronics)

[Sandy]

Tim -

Go check out some of the schematics on the EFI332 FTP site, may have some
help, note that as yet these are untested for the most part, I/O board
holders think about it ;-)

Sandy

At 12:59 AM 10/23/97 -0700, dzorde wrote:
>My understanding is that the sensor (in most cases) is just used to make up
>a voltage divider, scale the other resistor correctly and you could
>technically connect directly to the ADC.  Although I'd suggest a bit of
>filtering and probably an op-amp before the ADC.
>
>Dan     dzorde at geocities.com
>
>>Hi,
>>The following email is about A-D conversion of inputs from various
>>sensors. It's not really about EFI (sorry) but as some of
>>you may know the answer, I post it here :o)
>>
>>I am in the process of making a digital data-logger which uses an 8051
>>(similar) with 6 channel A-D conversion on chip. All seems to be ok. I
>>have the LCD, a PIC 16C55 controller board interfacing to RS232 that all
>>works ok. Now, the quest is to interface it to the real world. In
>>researching this, I have decided to use 80C550 or 87C748. There is no
>>reqirement in the design to use a serial link, so they should be ok.
>>The questions I have are;
>>    The oil temperature, water temperature, oil pressure sensors use
>>what range of voltage? It is my understanding that they ground a "12V"