ad_dc_INDICATOR

Published:2009/7/9 5:22:00 Author:May | From:SeekIC

By using two switching transistors and two LEDs, this circuit can distinguish low-level ac and dc sig-nals. If the red LED illuminates, the signal is positive dc. If the yellow LED lights, the signal is negative dc.If the signal is ac, both LEDs will light.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/LED_and_Light_Circuit/ad_dc_INDICATOR.html

Print this Page | Comments | Reading(3)