Hold function for Telephone Hold function for Telephone| DISCLAIMER: I\'ve collected these information from different sources. The author may revise this documentation from time to time without notice. THIS DOCUMENTATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN NO EVENT SHALL THE AUTOR BE LIABLE FOR INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES OF ANY KIND ARISING FROM ANY ERROR IN THIS DOCUMENTATION, INCLUDING WITHOUT LIMITATION ANY LOSS OR INTERRUPTION OF BUSINESS, PROFITS, USE, OR DATA. |
Here's the schematic that was in the November 1992 issue of Electronics Now. (Nobody sue me)
+-------+------+ 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 | | | | | +-------+------+
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