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The SLIC (Subscriber Line Interface Circuit )
This unit is required to detect every status from an usual
telephone set for the Controlling circuit ( Exchange ). It
interfaces an usual telephone to the controlling circuit. Two
slimier SLIC are required for this project.
Parts list :
Transistors
1.2SD667 x 1
2.2SC945 x 2
Diodes
1.
1N4007 x 4
2. 9 v zener x 3
3.
12 v zener x 1
4.
LED x 1
Capacitors ( 16 V )
1. 47 uf x 1
2. 22 uf x 1
3. 220 uf x 1
Resistors
1. 10 K x 3
2. 47 K x 1
3. 470 x 1
4. 100 x 2
5. 47 ( ½ w ) x 1
6. 5 (½ w ) x 2
Other Parts
RJ 11 telephone connector x 1
12 V telephone rely x 1
Necessary wires
Unit developed by
Achira – [email protected] |
