KISS robotic phone button presser

NOTE: This is a fresh design and I'll probably be making refinements as needed.

ok, it's a stretch to call this robotic. All it's designed to do is press a fixed point on a phone (KISS!). The use case is debugging an Android phone on a remote machine and periodically the phone asks "Allow USB Debugging?". Not too convenient on a remote machine. Designed for a Samsung A20 so you may need to make adjustments for other phones.

Parts:
-ucel a14092600ux0438 push pull solenoid
-3 x M3 bolts
-stylus tip and glue. I used a putty epoxy. Hot melt glue might work too. The tip is glued to the opposite side of the plunger than normal.
-USB Relay Module (Amazon) There are youtube and customer comments on how to program the module

print in PLA. no supports needed. The only odd thing is that I heated the bar in hot water to put a bow in it so that it has a spring action to help hold the fixture in place.

I've included the slider and solenoid holder separately so that you can design your own holder and merge with the slider. If you get the same ucel solenoid, print the sliderholder stl file that has to two pieces merged.

ucel solenoid is 5V, but it runs fine on 3V (2 dry cell batteries). For this appication you could even run at 1.5V. Not very strong at 1.5V, but for pressing a phone soft button you don't need much. Reviews for this solenoh id say to only leave it on for brief periods ... which is all I need anyway.