Recent content by kuhl0040

Here's the attached diagram and link to the frequency to voltage converter i want to use. http://www.national.com/ds/LM/LM2907.pdf tyler

i guess i should explain what I'm trying to do. I need to log rpm, and my dataq logger needs a +- 10 volt analog signal, thus I'm trying to use a frequency to analog voltage circuit using a lm2917. I think I am using the right diagram, the one that's attached, but the guy at National...

So the signal an aftermarket tachometer uses is in the hundreds of volts?

I am looking for the amount of voltage seen on the negative side of the coil terminal. So if I hooked up an oscilliscope to the negative terminal of my ignition coil what would the waveform look like? Thanks, Tyler

Voltage pulse from ignition coil ?? Hi, Does anyone know the voltage of the pulse from a typical ignition coil? thanks. tyler

Did you guys ever get this working? Hi, I am looking to do the same thing, your link no longer works to the diagram. Just wondering if you ever got the converter to work and if so how. Thanks. Tyler Kuhlmann