<VV> [fastvair] adapter between sending unit and gauge

[jvhroberts at aol.com]

 This would be a great way to make different thermistors work. The curve may not be spot on, but it will be repeatable. 

Another way is to build a 'voltage follower' using an op amp, preferably a CMOS version such as http://www.ti.com/general/docs/lit/getliterature.tsp?genericPartNumber=OPA725&fileType=pdf

Note CMOS op amps can get much closer to the + and - supplies than bipolar amps. Which, for max/min reasons, it's desirable. 

this is a voltage follower:
https://www.google.com/search?q=op+amp+voltage+follower&ie=utf-8&oe=utf-8

Add a pot from the thermistor to switched +12v, and you can then adjust the resistor to get the output you want. 



 

John Roberts
 

 

-----Original Message-----
From: Jay Maechtlen jaysplace at laserpubs.com [fastvair] <fastvair at yahoogroups.com>
To: Virtualvairs <Virtualvairs at corvair.org>; fastvair <fastvair at yahoogroups.com>
Sent: Sat, Apr 22, 2017 3:22 am
Subject: [fastvair] adapter between sending unit and gauge



  
    
                  
here's something cool:

adapt between any sending unit and any gauge.

http://www.technoversions.com/MeterMatchHome.html

(regular meters - not tacho, and prob wouldn't be accurate for the 
thermister temp gauges, because this device is linear only)

but still - adapting a gas gauge or oil pressure gauge to a different 
sender?

fwiw

Jay

-- 
Jay Maechtlen
SoCal
'61 2-dr modified w/fiberglass skin,
transverse 3.8 Buick V6 TH440T4 trans

    
             
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        Posted by: Jay Maechtlen <jaysplace at laserpubs.com>        
     
    
 
    
      
        
          
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