Here is the start of my next project.
A Custom Transmission Completion Confirmation Tone A.k.A. Roger Beep
Here is the circuit board, salvaged from a goodwill bargain wireless doorbell system
I am going to be powering the device from the Transceiver using a 7805 regulator and a voltage divider as the device ran off 4.5 v via x3 C batteries.
It is pre-programmed with a short tone and a double doorbell style sound wich I have tweaked the resistance & "bent the circuit" to make it sound more like a real roger beep and not a door bell! I will post a video with the sound later.
The 7 tone westminister chime will not be used in this project LOL .
In repurposing this device I face a few challenges ahead due the to lack of an oscilloscope.
Firstly I need to determine what in the circuit "triggers" the tone sequence when the tx signal is detected by the lc oscillator circuit, namely what transistor "switches on" so I can tie in the relay that will be similar or identical to one pulled from this board.
In this photo you also see the back of the doorbell button module that will not be used in this project.
The receiver side of the sound board will be disabled and the original wireless system will be tossed aside, I don't want stray/foriegn RF inside the Radio Unit. I have it here just to trigger the tone sequence untill i tie-in a push button directly on the board for further testing untill the relay is in circuit.
I'm going to tie this all in so it works like a traditional roger beep.
All i have for tools are Digital Multi Meter & Freq. Counter
No scope to probe around with so I need to learn how to modify this circuit to activate the sequence with a momentary push button, thus cutting all the doorbell wireless stuff out of the picture.
My next challenge is injecting the signal into audio line.
The circuit board as configured is set to drive a .25 watt 8 Ohm speaker (heard quit loud notably)
I need the Line Level Audio Signal that carrires the tones to be injected not the speaker level signal that has been amplified to be heard through the speaker; i don't wan't to damage the transciever.
Any hints as to where i should look for the line level audio signal; this is a mV signal but not "huge" like 500mV? correct?
Any Tips, Ideas, Hints or Suggesyions Are welcome!
Thank You for Reading this, & please join me to make it a conversation!
A Custom Transmission Completion Confirmation Tone A.k.A. Roger Beep
Here is the circuit board, salvaged from a goodwill bargain wireless doorbell system
I am going to be powering the device from the Transceiver using a 7805 regulator and a voltage divider as the device ran off 4.5 v via x3 C batteries.
It is pre-programmed with a short tone and a double doorbell style sound wich I have tweaked the resistance & "bent the circuit" to make it sound more like a real roger beep and not a door bell! I will post a video with the sound later.
The 7 tone westminister chime will not be used in this project LOL .
In repurposing this device I face a few challenges ahead due the to lack of an oscilloscope.
Firstly I need to determine what in the circuit "triggers" the tone sequence when the tx signal is detected by the lc oscillator circuit, namely what transistor "switches on" so I can tie in the relay that will be similar or identical to one pulled from this board.
In this photo you also see the back of the doorbell button module that will not be used in this project.
The receiver side of the sound board will be disabled and the original wireless system will be tossed aside, I don't want stray/foriegn RF inside the Radio Unit. I have it here just to trigger the tone sequence untill i tie-in a push button directly on the board for further testing untill the relay is in circuit.
I'm going to tie this all in so it works like a traditional roger beep.
All i have for tools are Digital Multi Meter & Freq. Counter
No scope to probe around with so I need to learn how to modify this circuit to activate the sequence with a momentary push button, thus cutting all the doorbell wireless stuff out of the picture.
My next challenge is injecting the signal into audio line.
The circuit board as configured is set to drive a .25 watt 8 Ohm speaker (heard quit loud notably)
I need the Line Level Audio Signal that carrires the tones to be injected not the speaker level signal that has been amplified to be heard through the speaker; i don't wan't to damage the transciever.
Any hints as to where i should look for the line level audio signal; this is a mV signal but not "huge" like 500mV? correct?
Any Tips, Ideas, Hints or Suggesyions Are welcome!
Thank You for Reading this, & please join me to make it a conversation!