Re: Batt Meter & 'test S/W


From: Howard D Rubin (
Date: Sat Sep 13 1997 - 10:22:03 EDT


Design of this voltmeter can be as simple as a zener diode, resistor, and
0-10 volt meter in parallel with the resistor, or a lot more complicated
if higher precision or accuracy is needed. What are your requirements?

Some parameters to decide are:

parts cost
assembly time
power supply available
expertise level
existing circuitry
other ?


Howard Rubin, N3FEL
Editor, X-Mitter
Penn Wireless Association

On Sat, 13 Sep 1997 09:02:05 -0400 writes:
>A number of years ago, there were a few articles published about
>building an expanded scale voltmeter for checking batteries. The
>used a zener diode so that the left end of the scale was something
>8 or ten volts and the right end of the scale was around 15 volts.
>anyone know a source for this info? Was it published in the QRP
>I saw some questions go by this list a while back asking about the
>availability of good contest software for QRP contests but I never saw
>an answer. I am using a 386PC with Windows 3.1. Any suggestions?
>Bill - K4AHK

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