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Screensize: 640 x 480 800 x 600 1024 x 768 1280 x 1024 UserName: Password: Format Mode: Basic  Help  Prompt  Format: Font Andale Mono Arial Arial Black Book Antiqua Century Gothic Comic Sans MS Courier New Georgia Impact Lucida Console Script MT Bold Stencil Tahoma Times New Roman Trebuchet MS Verdana   Size 1 2 3 4 5 6   Color Black Red Yellow Pink Green Orange Purple Blue Beige Brown Teal Navy Maroon LimeGreen Message: * HTML is OFF * Forum Code is ON Smilies [quote][i]Originally posted by n/a[/i] [br]Hello folks, I have reviewed the circuit for the ring detect w/light. I need very simular functionality except I would like to drive a small relay to close it's contact if ring voltage is detected. I don't want the relay to oscilate on/off but stay on during the presence of the ring voltage. This circuit will need to drive the requirements for the Night Ringer function of a BOGEN TPU-15 Telephone Paging Amplifier. It's been quite a while since I''ve designed some I am rusty and could use some ideas. Thanks much. DLongan [/quote]    Insert an Image File (GIF, JPG, JPEG, BMP, ZIP, PNG) Check here to include your profile signature.