EXPANDED_SCALE_ANALOG_METER

Published:2009/7/9 23:38:00 Author:May | From:SeekIC

The circuit consists of 0-1 mA meter M1, 6.2-V zener diode D1, and 12-KΩ, 1% resistor R1. R2 is included in the circuit as a load resistor for the zener diode. The value of R2 isn't critical; use a value of 1000 to 1500 Ω. The meter reads from 6 to 18 volts, which is perfect for checking a car's charging system.



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