Soldering Help/Button Layout on a PCB Board

[brlnoble]

I'm in the process of outfitting an old 1960s radio with a bluetooth speaker I got. I bought a bluetooth speaker and tore it apart since my knowledge of coding in that area is pretty weak. I've gotten everything working so far except for these buttons.

The code I wrote lets me use a potentiometer as the volume control and outputs a pulse if I turn the volume up or down, I have gotten it to work with LEDs so far. Essentially what I am trying to do is connect a wire from my Arduino to one of the button leads on this PCB board, allowing me to bypass having to press the button and just send a pulse directly into the board. I've tried just pressing a copper wire against the leads but have had no success at all in triggering the button remotely.

Anyone know where I need to solder to so I can send signals into the board without having to press the button?

(sorry if this is in the wrong section on the forum, this is my first post here)

 

[KJ6EAD]

More often than not, the switches sink an I/O line to ground when pressed.

How does dismantling a bluetooth (receiver) help to mitigate your weak coding skills?

Is the old radio being used only for aesthetics?

What "everything" have you got working?

 

[brlnoble]

More often than not, the switches sink an I/O line to ground when pressed.

How does dismantling a bluetooth (receiver) help to mitigate your weak coding skills?

Is the old radio being used only for aesthetics?

What "everything" have you got working?

I don't know how to code my own bluetooth module myself so I simply am taking the internals of a bluetooth speaker and wiring them up inside the old radio which is being used for aesthetics.

The old radio used a potentiometer to control the volume levels which I want to keep, the bluetooth speaker however has a volume up and volume down button. I'm trying to rewire the buttons to what I built (see video below)

The red LED represents volume up, green is down. I want to use these pulses and instead transfer them onto the PCB board to bypass having to press the buttons. My problem is that I don't know where to solder onto the PCB board to do this.

 

[KJ6EAD]

The B in PCB is board. The term 'PCB board' is redundant.

What is a pulse and why do you believe that's what you need?

 

[brlnoble]

The B in PCB is board. The term 'PCB board' is redundant.

What is a pulse and why do you believe that's what you need?

I want to use the potentiometer as an input instead of the buttons. As the video shows above, the Arduino sends out a pulse (or short signal) depending on which direction I turn the pot. This lets me turn the analog signal of the pot into digital, simple on/off signals that a button would normally output. I want to control the volume on the bluetooth speaker with these signals rather than the buttons.

In theory I should be able to supply the correct signal to the output terminal of where the button is on the speaker board, bypassing the button entirely. I just need some help figuring out if I need a + or - signal to supply, and to where on the PCB I should connect to.