1-Telephone voice recoder
2-Phone sound enhancement
3-Annoying phone navigation
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Step 1: Circuit , PCB , Components Required
R1- 39 K
R3- 33 K
C1- 330 pf
C2- 1 nf
C3- 47 pf
C4- 12 pf
Step 2: the Beginning and Soldering
This circuit dont need any batterry and speaker.
Step 3: How Do It Work ↓↓↓
you should connect a wire to ANT
and connect two wire to IN and OUT too.
now you should plug the circuit to telephone line and connect the OUT to telephone.
set up the radio when the telephone ring without answer
the telephone on radio you can
hear the voice of the annoying.
Step 4: If It Dont Work :-( ↓↓↓↓
Excuse me my english is not very good. :-/