Inspired by other FTIR prototypes I decided to use an aluminum frame. The main reasons for are because its cheap and strong.
Before actually working on the frame, I made a drawing in AutoCAD. Within this drawing I could easily calculate the amount of IR LED’s I would need and at the same time see how the IR light beams would spread.
The local tool shop was friendly enough to cut the aluminum frame (H shaped) into the sizes of my drawing.
So at home I just needed to remove the edges in 45 degrees.
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- Saw (for aluminum/iron)
- Mitre Block
- Drill bits (multiple sizes)
Next step is drilling holes for the LED’s. Before drilling I used a Punch to make sure the Drill won’t shift during drilling.You could start with a small Drill bit but I just started with 3.5 mm and after that I used 5 mm (which is the size of my LED’s).
Next time I’ll cover soldering the LED’s…