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Mechanical Seven Segment Display
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Mechanical 7-segment display that shows a single digit and counts from 0 to 9 using a camshaft
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- Printables
- Kategoria
- Engineering
- Licencja
- Creative Commons — Attribution
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Important: There is a new version that uses only a single camshaft. You should use that version instead.
This is a mechanical seven segment display that counts from 0 to 9 using a pair of camshafts.
Non-printed parts
- 4x Square M3 Nuts
- 4x M3x6 screws (or longer)
- Plastic glue (it will work without glue, but relies on gravity and friction to keep things in place)
Printed parts
- 1x Front plate
- 2x Side plate
- 2x Bottom Plate
- 7x Segment
- 2x Pusher Right
- 2x Pusher Left
- 3x Pusher Center
- 7x Pusher Pin
- 1x Camshaft
- 1x Camshaft Counterpart
- Optional: Knob. The unit can also be driven with a Lego Technic axle
Printing
The camshafts should be printed standing up with supports (I used organic supports). Everything else can be printed laying flat without supports.
Assembly
- Insert four square M3 nuts into the front plate and glue them into place
- Put a pusher pin into each pusher plate and glue it in place.
- Connect a segment to each pusher as shown in the photo.
- Put the segments into the front plate.
- Attach the side plate on the side where the pushers don't have an opening and screw it into place.
- Place the two camshafts between the top and bottom plate and make sure that the arrows at the top of the camshafts line up.
- Insert the camshaft assembly into the unit.
- Attach the other side plate and screw it into place.
- Attach the knob
