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Re: Mechanical speedometer drive solution
This is a screen shot of the oscilloscope, the truck is idling in 2nd gear at 10mph.
ppm = pulse per mile
Channel 1 is the 2000ppm at 5.1Hz
Channel 2 is the 4000ppm at 10.45Hz
Channel 3 is the 128,000ppm at 332Hz
The Gauge Cluster diagram shows a divide by 32 circuit, so 332Hz/32= 10.375
10.375 is close to 10.45Hz, so the frequency counter in the o-scope is acurate and the readings are valid.
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