XR2206 Frequency Generator Box – No Supports (krabička na tónový generátor)
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A box for the XR2206 generator, matching the DIY kit as well as the ready-made product. Two top cover options included.
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Model information
- Source
- Printables
- Category
- Other Gadgets
- License
- Creative Commons — Attribution
Introduction
My DIY kit came with box components but they can't have worked, ever. The original box does not allow for how tall the 10-µF capacitors are. The original sides allow only 10mm, while the caps measure over 12 mm and the printed board itself takes several mm, too. So the original box is at least 4 to 5 mm too shallow. Making it simply taller is also out of the question, because with a taller box there is not enough purchase for potentiometer knobs since not a long enough portion of the shafts sticks out. Hence I made a box of my own.
Important personal notice [edit]: On day 2 the 100-µF filter capacitor in my DIY generator exploded. The box contained it, no harm done. Total loss around 10 ¢. I'm really glad I had the case though. I may have been fishing the aluminium cylinder out of my eye otherwise. Share in my luck! Do as I did! Print the box!
Options
There is a single model for the box bottom, but two different options for the top. The difference between those two consists in the size of the potentiometer knob holes:
Flush knobs: potentiometer knobs sit on the top surface of the box. That is, the holes are only wide enough for the potentiometer shafts to pass through, but not the knobs.
Sunk knobs: Potentiometer knobs are sunk into the box cover. The holes are wide enough to accommodate their full width.
 Flush fit |  Sunk fit |
|---|
Printing and Assembly
This is another easy print. Both halves print surface-down, wall-up. No supports are required. I print in PLA on a 0.4-mm nozzle (standard), and with 0.2-mm layers.
For assembly:
Set the bottom on your table. Take care to choose the proper orientation: observe where the wall is cut out – these cutout must match the power input on the left, and the output terminals on the right.
Drop the generator circuit board inside. The mounting holes in its corners should sit flush on the mounting pins.
Press the top over it. You can get away wit pre-fitting your potentiometer knobs of you printed the sunk option of the top. Otherwise, wait until you are sure the top fits before pressing on the knobs.