DSO138 Oscilloscope Box Case (Krabička na osciloskop)

Introduction

This oscilloscope is sold either assembled or as a kit. Whatever the case, you might want to enclose it in a box. Original acrylic boxes were sold but I gave them a pass when they were available, and now I just printed my own design rather than go hunting online for survivors.

Features

The box hides extra features available on the circuit, such as the test signal terminals on top. You're welcome to modify it (with CAD or drill, your preference) if you want those features exposed. What the box acknowledges are:

• The coaxial probe outlet on to top left

• The power inlet in the top right

• The mini-USB connector at the bottom center

• The three slider switches on the left

• The four buttons on the right

• The reset button on the bottom right

• The power indicator below the display

• The main 2.5" display

Note that sadly I have no experience with light-conductive components, so the power indicator is just a see-through aperture that lets you view the LED on the circuit board below, if you look at it from the right angle. I'll be happy for tips, and I promise to come back and update the model when I learn how to do it with proper light pipe technology.

Printing and Assembly

The printing process is relatively straightforward, but the model has 10 parts so there is a lot of printing involved, and some assembly. The parts you need to print are:

• One case bottom (Oscilloscope-case-bottom.stl)

• One case top (Oscilloscope-case-top.stl)

• Three switch sliders (Oscilloscope-case-switch.stl)

• Four regular buttons (Oscilloscope-case-button.stl)

• One reset button (Oscilloscope-case-reset-button.stl)

I printed all with PLA, 0.4-mm nozzle and 0.2-mm layers. Everything is printed widest-part-down. Check out the attached 3mf file. Everything fits on a single platter, even on a MINI, and you can print as is, or swap colours and print in multiple goes.

Optionally, you may print different buttons in different colours. In my case, I printed the + button green, and the − button red.

To assemble the box, I recommend going this way:

1. Press the switch sliders into their apertures in the case top. There will be a lot of resistance until the slider comes in fully; once in, it will begin to slide freely but won't fall out, which is the point of it.

2. Put all five buttons (four regular and one reset) in their place from the inside of the case top.

   

3. Sit the circuit board inside the case bottom. The mounting holes in the board will fit the pegs in the case.

   

4. Turn the bottom upside down and drop it on the top. if you haven't done so yet, this is your last chance to remove the protective film from the display.

5. Press the top and bottom together. The L-hooks on both sides should slide within their tracks (after you've helped them mounting on the base from the sides).  They will click closed when the two halves are pressed fully together.