Step Three:

Install the push-button Switches

These instructions assume you are using buttons provided in the Wiring Kit from Phase Dock or authentic flight buttons from APEM. If you have chosen a different button, the installation may not be the same.  Note that only 7mm or 10mm diameter switches will work in the AstroPi RDX as configured.

NOTE on the language: push-button switch, button and switch all refer to the same item. We think it is a matter of which side of the Atlantic you call home.  Rather than enforce any regional preferences, we will use these terms fairly interchangeably. 

BONUS: Button holes in the Phase Dock case are sized for 10mm buttons. We provide acrylic button adapters that make it easy to install 7mm buttons.  You can choose either size with confidence that your case project will look great and go together smoothly.  Plus, if you start with 7mm buttons and decide to upgrade your case with 10mm buttons, all you need to do is remove the acrylic adapter plates and install the new buttons. 


Option 1: 7mm Push-Button Switches

Step 3-1 IMG_1319.JPG

Follow this series if you have 7mm switches.  Or skip down to the 10mm switch instructions.

Unscrew and remove the nut from one switch (if applicable).  If you are using our 7mm adapter plates, you will not need the lock washers, so you can set those aside.   

TIP:  Lock washers can scar the 7mm adapter plates. The spring in the plates will help keep the retention nuts in place.

Step 3-2 IMG_1326 cropped.jpg

Peel the protective cover off the three acrylic adapter plates.

Place the large 6-hole clear plastic switch adapter plate inside the switch-half case, push it up against the wall of the case so the profiles match and align it with the switch bores in the case.

Step 3-3 IMG_1332.JPG

Insert the button through the adapter plate from the inside of the case somewhere in the four-hole pattern; it doesn’t matter which one. 

Hold the inside adapter plate and switch firmly in place for the next steps.

Back on the top (outside) of the case, put the four-hole outer adapter plate in place over the first switch. 

Step 3-4 IMG_1397.JPG

Still looking at the top side of the lid, place the nut on the top side; tighten with your fingers.

As you tighten them, turn the switches so that the individual terminal blades on each switch are vertical on the back side before you tighten the nut fully.  This will make the wiring step easier.  Make sure your installation matches the photo left.

CAREFUL!  Don’t over-tighten the nuts on the switches; the acrylic adapter plates can crack if you use too much force.

Step 3-5 IMG_1336.JPG

Repeat this process for the remaining switches in the four-hole pattern.

Likewise, install one switch in the two-hole pattern. Place the two-hole acrylic adapter plate on the top side; continue until all switches have been installed. 

Option 2: 10mm Push-Button Switches 


Unscrew and remove the nut from one switch.  Remove the lock washer as well. You will need the lock washer for the 10mm switches, so keep these at hand.

Note that the 10mm switches have a small anti-torque tang built in on the underside of the mounting flange.  This is to prevent the switch from turning as you tighten the retention nut on installation. 

CAUTION: Make sure to put this tang into the cut-out notch in the switch bore, or the switch will not seat correctly onto the case, and you may damage the switch when you tighten it down


Insert the switch into one of the bores from the outside of the case, aligning the tang correctly. 

Put the lock washer in place from inside the case, and then thread the retention nut onto the switch body. 

ALERT: The threaded switch bodies are plastic, so be sure to carefully align the retention nut so you don’t cross-thread the nut and damage the threads.  Always start nuts by hand; use a wrench only after you are sure it is correctly started.

Tighten the nut firmly, but do not over-tighten. 

Repeat this process for the other five switches in the case.

Go on to Step 4: Connect the Push-Button Switches