I have made everything else for a little beeper system for my friends shop so that when someone walks through the door you will know. Its wireless by the way.
Im having some trouble with the receiver end of the system unfortunately.
In my schematic, the farthest left is an RF module, followed by the HT12E, then two 555's, the first creates a delay for the other 555 to stay on, and the next 555 makes the buzzer go 'beep beep beep'.
For some odd reason, the setup is not working at all, and I can see the square waves of the second 555 at the output of the RF module. It will also start beeping on its own, with beeps that decrease in frequency from about 10 HZ to 3 HZ.
Is my schematic correct?