TTLLOGIC_TESTER

Published:2009/6/25 4:26:00 Author:May | From:SeekIC

Gates GI and G2 together with resistors RI and R2 form a simple voltage monitor that has a trip point of 1.4 volts. Gate G3 is simply an inverter. The display section of the tester consists of a common anode alphanumeric LED and current-limiting resistors. It indicates whether the input voltage is above or below 1.4 V, and displays a H or a L (for high or low logic-level) respectively.



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