Wireless Mailbox Notifier

WIRELESS MAILBOX NOTIFIER

This electronic mailbox notifier gives by means of a transceiver, over a distance of a few hundreds of meters, a message that the mail has delivered.
As soon as the lid of the mailbox opens, the transmitter will send for a half second a signal to the receiver in the house. The receiver will produce then an intermitting signal (beep sound or led flash) until reset.
Building the electronic mailbox notifier is not difficult, but it needs some knowledge of electronics.