WIDE_RANGE_VOLTAGE_PROBE

Published:2009/7/15 2:11:00 Author:Jessie | From:SeekIC

Indicates presence of AC or DC voltages from 3 to 350 V with no ranges witching, using LED as indicator. Transistors serve essentially as constant-current supply for LED Voltage capability can be increased to 450 V by adding suitable base-emitter resistor Rbe; typical value is 60 ohms, which somewhat impairs low-voltage operation.-G. Jones, Voltage Probe, Wireless World, Aug. 1976, p 52.



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