Ringer-relay


Posted on Sep 17, 2012

When the phone rings, the ring signal from the telephone company lights a neon lamp within a CLM3120 optocoupler. That causes a drop in the resistance of the CdS cell output of the device, turning on transistor Ql.


Ringer-relay
Click here to download the full size of the above Circuit.

When Ql turns on, relay Kl is energized. The circuit should be connected in series with the lamp that is to be activated.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Model Railroad OdometerCar
Morse Code Beacon Keyer
Hand Steadiness electronic Game
12 V battery charger
Augmenting Plant Behavior Through Robotics using Arduino
usb-voltage-converter-5v-to-12v.html
Lighting Control
integrated circuit Improving absolute precision of ADC to balance battery voltage
Wien Bridge Oscillator
50WOTL amplifier circuit
CIC2851E refrigerator closed remind schematic



Top