Install Button Holder

Fit the 3d printed button holder over the black button housing by inserting the steam through the center hole. The side walls should match up with the nubs on the side of the holder. Rotate the holder until they line up and hold them together.

Install Button to Box

Now fit the stem of the button housing through the center hole on the 3d printed box enclosure. Hold them together and flip the box under. Insert the threaded ring by screwing it onto the threaded stem of the button housing.

Setup Box

Ensure the holes are lined up before fully tightening the threaded ring. 

Orient Holes 

Flip the box assembly back over and look to see if the holes are all lined up and matching. If the holes are slightly off center, you can reinstall the button housing by rotating it 180 degrees. 

Install and Secure Speaker

Place the speaker into the 3d printed box enclosure. Orient the speaker so the cone lines up with the little holes on the side of the box. The tabs of the speaker should slide into the clips inside of the box. You can insert and fasten two M3 x 5mm screws to secure the top tabs on the speaker to the standoffs on the side of the box enclosure.

Tap Mounting Holes

The mounting holes on the PAM8302 audio amplifier are a bit tight, so I suggest using an M2.5 tapping tool to thread the holes. This will make it easier to fasten M2.5 machine screws through the mounting holes. 

Secure Amplifier

Place the PAM8302 audio amplifier into the 3d printed box enclosure. Line up the mounting holes with the two standoffs inside the box. Hold the board down while fastening the machine screws to the standoffs. 

Install Potentiometer

Insert the shaft of the potentiometer through the inside of the 3d printed box enclosure. Press the shaft all the through the hole in the corner of the box. Hold it up against the top surface and insert the washer and hex nut. Fasten the nut until it's fully tightened and secured to the box.

Thread Amp Wiring

Grab the wiring from the amplifier and thread them through one of the holes in the box. On the top side of the button, pull the wiring all the way through.

Thread JST Power

Do the same wire thread for the JST male connector. I pushed the connector through a different hole.

Install TRS Jack

Insert the TRS jack through the side hole on the inside of the 3d printed box enclosure. While holding it in place, screw the included hex nut to panel mount the jack to the side of the box. Fasten the hex nut until it's fully tightened and secured to the box.

Thread TRS Wires

Insert and thread the wiring from the TRS jack to one of the holes. Here I shared the same hole as the button wiring, for consistency purposes. They're both going to connected to the same pins on the CPX.

Installed TRS / Button Wires

Here's what the inside of the 3d printed box enclosure looks like. Try to keep the wires nice and tidy, so lots of heat shrink tubing is ideal. 

Installed USB Cable

Now we can insert the wires from the USB cable through the TOP of the button housing (not the inside). The male USB connector should be on the outside of the 3d printed box enclosure.

Threaded Wiring

And now we have all of the wires threaded through the holes! Up next we'll connect all of these wires to the CPX. 

This guide was first published on Feb 14, 2018. It was last updated on May 18, 2024.

This page (Assembly) was last updated on Mar 08, 2024.

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