Home Projects Telephone Related Phone line indicator

  

 

Phone line indicator

 

 

 

diagramm.gif (6565 bytes)

 

 

 board1.gif (10209 bytes)         diagramm.jpg (9155 bytes)

 

 

R1= 100KΩ
R2= 1MΩ
C1=1μ/63V
T1=BF256B
D1..D4=1N4004
D5= 10V/1W
D6=Led red

 
 
 

 

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