Hi Guys (and Gals)

My Dad's been hinting at me that he'd like a tachometer (rev counter)
fitted to his car and so I'm looking into the possibility of building him
one for Christmas (also because he's difficult to buy a present for). I had
a problem searching the archive when I tried and searching the web didn't
help much. My plan is to use a wire around a spark lead as the sensor with
a PIC counting the pulses and displaying to two 7-seg displays the Revs per
min also an LED bar graph with a 'red-line'. But to begin with a simple
rev-counter would do and I could build on from that at a later date (like
an add-on for his birthday ;-) ).
I'll need some form of transformer to take the 12v car battery to a 5v
regulated circuit for the PIC, any help with all of this would be greatly
appreciated. If, and when, I've built my tachometer I'll be sure to build a
website of some sort to display the information to others.


Mark Craig
m.craig@ntlworld.com
m_craig_piclist@yahoo.co.uk [piclist realated]
Glasgow
Scotland


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