[Diy_efi] Tacho signal from ecu

[Mehul Mistry]

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Hello,
 
I wonder if anybody can help me. I am thinking of building my own pic microcontroller based rpm meter with gear change indicator. 
 
I wanted to know if the tacho signal generated by the engine management systems is pulse per revolution or pulse per spark??
 
Cheers.
Mehul
 
 

		
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<DIV><FONT face=Verdana size=1>Hello,</FONT></DIV>
<DIV><FONT face=Verdana size=1></FONT>&nbsp;</DIV>
<DIV><FONT face=Verdana size=1>I wonder if anybody can help me. I am thinking of building my own pic microcontroller based rpm meter with gear change indicator. </FONT></DIV>
<DIV><FONT face=Verdana size=1></FONT>&nbsp;</DIV>
<DIV><FONT face=Verdana size=1>I wanted to know if the tacho signal generated by the engine management systems is pulse per revolution or pulse per spark??</FONT></DIV>
<DIV><FONT face=Verdana size=1></FONT>&nbsp;</DIV>
<DIV><FONT face=Verdana size=1>Cheers.</FONT></DIV>
<DIV><FONT face=Verdana size=1>Mehul</FONT></DIV>
<DIV><FONT face=Verdana size=1></FONT>&nbsp;</DIV>
<DIV><FONT face=Verdana size=1></FONT>&nbsp;</DIV><p>
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