I m currently trying to built this circuit
http://talkingelectronics.com/projects/WirelessDoorbell/WirelessDoorbell.html
but i can't understand how the 303 MHz frequency is produced. From what i know you are supposed to shift the output of the transistor by 180 degrees before feedback. I dont see how this circuit does so...
I do understand how to produce the pulses, but as i said i cant see how the modulation occurs...
http://talkingelectronics.com/projects/WirelessDoorbell/WirelessDoorbell.html
but i can't understand how the 303 MHz frequency is produced. From what i know you are supposed to shift the output of the transistor by 180 degrees before feedback. I dont see how this circuit does so...
I do understand how to produce the pulses, but as i said i cant see how the modulation occurs...