I could really use some help with this. Previously, I owned a Chamberlain brand driveway alert system, not only did it have its built in chime on the base unit, it had a relay on board that could connect to doorbells, a dialer, or whatever.
Recently I ordered a replacement. The previous model being discontinued, I ordered the new model (Chamberlain CWA2000) that has no relay, only a small speaker, and blinking LED. I was confident I could find a place on the board to tap a relay into, and I did find one spot that reads 3.5 volts when alarming, but it does not have the amperage (?) to power a 3.3 volt relay. Other spots on the board read 7 volts when idle, and 11 volts momentarily when alarming. These will close a 9 volt relay even when in the 7 volt idle stage but I do not have the know-how to use that difference. Can anyone help?
Recently I ordered a replacement. The previous model being discontinued, I ordered the new model (Chamberlain CWA2000) that has no relay, only a small speaker, and blinking LED. I was confident I could find a place on the board to tap a relay into, and I did find one spot that reads 3.5 volts when alarming, but it does not have the amperage (?) to power a 3.3 volt relay. Other spots on the board read 7 volts when idle, and 11 volts momentarily when alarming. These will close a 9 volt relay even when in the 7 volt idle stage but I do not have the know-how to use that difference. Can anyone help?