Hold function for Telephone

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+——-+——+      R1 = 2.2K    |       |      |      R2 = 1 K  -| SW     R      |      R3 = 47 ohms    |       1      |      SCR = 2N5064, TIC47, or MCR104    |       |      |    R      LED     |               Well, that’s it, just remember that    2       |      |               the cathode of both the SCR and the    |       |      +- RING (Red)   LED are towards the bottom.    +——SCR    |       |      +- TIP (Green)    R       |      |    3       |      |    |       |      |    +——-+——+  

Sources

  • figment[at]wam.umd.edu

Category:Telephone

 

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