micky wrote:


For the little 1" x 3" transmitter, I bypassed the pushbutton switch so
it's always closed, and in place of the battery, I gave it the rectified
output of the doorbell transformer, but only when someone presses the
outside doorbell button.

If they hold the button for about a second or more, the buzzer in the
2nd floor hall buzzes, and if I'm on the second floor, I always hear it.
You might be able to put a larger capacitor on the DC side of the rectifier
to hold enough charge to keep the transmitter running long enough to
sound the remote buzzer. It depends on how much current the transmitter
takes, but it shouldn't be all that much.

Jon