Stamp EFI

[Bruce Plecan]

-----Original Message-----
From: Sandy <sganz at wgn.net>
Subject: Re: Stamp EFI

On the topic of drivers the 1949 is getting rare, but there are two
relatively new numbers I got from Gar.

Cheery Semiconductors
CS 453     4.4/1.1   P+H
CS 452     2.4/0.6   P+H
First TBI, later TPI
Cheers
Bruce



>Looks pretty simple, some comments, by no mean anything other then some
>general idea (2Cents)
>
>One, get one of the standard 8 bit A/D serial converters. Use that for the
>Temp, TPS and MAP.  A four bit converter will only have limited resolution,
>the 8 bit are a dime a dozzen for the pic, and lots of sample software to
>drive them. You can easily get the rate of change in software, not too
>hard, so forget the hardware approach, KISS. Lastly the LM1949 can drive a
>low cost transistor TIP121, etc, no need for the mosfet, and they typically
>don't like the low voltage that could occur while cranking the engin over.
>You could get a logic level FET but even some of them are so-so at <
>5volts. Check out some of the smart power drivers, ie, IRF6210, built in
>charge pump, protected, and can be driven by most any logic level. Unless
>you are using Peak and Hold style injectors, no real need for the lm1949,
>just get something that can handle a couple of amps and you are good to go.
>
>Sandy
>
>At 01:23 PM 6/25/98 +1000, you wrote:
>>>I have read a thread today that looks like ths start of an
>>>possible EFI project using a basic stamp.
>>
>>>Any suggestions,ideas are welcome
>>
>>sorry about attaching a word doc, but it was the only way i could express
>>what I'm thinking of trying meaningfully....
>>
>>can a few people have a look at this and tell me if it's worth trying?
>>
>>thanks
>>
>>
>>
>>Matthew Harding
>>---------------
>>
>>reply to any of these....
>>
>>mharding at qonline.com.au
>>bernie at ronscomputers.com.au
>>bernie at browse-cafe.com.au
>