Easy enough to incorporate some "theft protection" in the design, no?
David L
On Thu, Sep 24, 2009 at 3:48 PM, WFO Herb <froggi60@gmail.com> wrote:
> I think the NPN should be a PNP.Herb
>
> On Wed, Sep 23, 2009 at 8:16 PM, Dean Hedin <dlh2001@comcast.net> wrote:
>
>> While we are on the topic of electric fuel pumps....
>>
>> I chisled out this circuit from National Semiconductor's application note
>> 162.
>>
>>
>>
http://i295.photobucket.com/albums/mm135/brokencase_photos/circuits/pumpsafe.
jpg
>>
>> It will only power on the fuel pump if the engine is turning over.
>> I ordered the parts and should attempt to build the cicuit this weekend.
>>
>> I'll let you know how it goes. If I make any alterations I will post an
>> update.
>>
>> Use at your own risk.
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