CMOS_UNIVERSAL_LOGIC_PROBE

Published:2009/7/9 20:40:00 Author:May | From:SeekIC

Only the CD4009AE hex buffer, two resistors, and two LEDs are required for a logic probe. CMOS logic probe features 1012Ω input impedance and covers 3 to 15 V range. While LEDs are visible at all voltages, a 1-KΩ pot in place of R2 will allow the user to increase brightness at lower voltages.



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