Position: Index > Monitor Circuit >

Receiver monitor

2015-01-26 05:14  
Declaration:We aim to transmit more information by carrying articles . We will delete it soon, if we are involved in the problems of article content ,copyright or other problems.


The alarm plugs into the earphone jack on a receiver. Then when a signal (normally fed to the headphones) is detected and applied to the gate of SCR1, it conducts, sounding whatever alarm is connected to SOI. The signaling device can be an audible alarm or a lamp.
Receiver monitor

Variable resistor Rl functions as a sensitivity control so that background noises won't trigger the alarm.



Reprinted Url Of This Article:
http://www.next.gr/rf/receivers/receiver-monitor-l12303.html