[V8] more speedo drivel

[dsaad at icehouse.net]

this sender gets 12 volts. The distributor mounted unit gets 5 volts I think.

Connect the resistor from the 12v wire to the sig out wire. This is called 
a "pull up" because the resistor pulls the sig wire to 12v when the sender is 
switched off.

OK?

Dave

Quoting CoultL at aol.com:

> I do not understand how you used the resistor and I am really curious. 
> If I remember correctly the hall sensor is supposed to get constant 5V. 
> Did you increase the supply voltage by connecting the sensor to a 12V
> source through the resistor?  
> 
> -Justin Lewis
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