[ausev] Homemade battery meter?

[Roy Hughes]

As im moving along in my car conversion i have been contemplating a battery meter gauge. the curtis one that people use is what i'd like, but how to make a homemade version? any suggestions?, leds, resistors etc it doesn't seem like it should be difficult to make a measurment of the battery pack and then tune an LED to come on at each point that i want to measure.
 
I have a voltmeter to install which is going to tell me what i want to know but for someone who is going to just drive the vehicle (like my wife) i dont think she would relish an hour instructional on how to read whether theres enough 'fuel' to get her home,
 
any help is as always much appreciated.
 
Roy
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