PHONE_HELPER

Published:2009/6/24 3:44:00 Author:Jessie | From:SeekIC

This phone-line simulator uses a 60-Hz transformer instead of a ring generator. The dial tone is provided by an NE555 astable oscillator.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Electrical_Equipment_Circuit/PHONE_HELPER.html

Print this Page | Comments | Reading(3)