Hi makers!

We are Alvaro Velazquez, Oscar Barrios and Guillermo Montoro, a group of three students from 'Creative Electronics', a Electronics Engineering 4th year module at the University of Málaga, School of Telecommunications. (http://www.uma.es/etsi-de-telecomunicacion). This instructable is our final project.

The main objective of this project is to make some images with lights. To that end, we will rotate an axis with a LED's row supporting on the persistence of vision. We must reach high speed, so we will use a gear system and a handle.

Step 1: Get Components

The full component list is the following:

- 1 x Wood board (350x230x16 mm)

- 2 x PVC pre-drilled board (210x300x3 mm) (15 mm hole to hole) (4 mm hole diameter)

- 3 x 18 Teeth gear (module 1) (4 mm hole diameter)

- 3 x 42 Teeth gear (module 1) (4 mm hole diameter)

- 4 x Metal axes (4 mm diameter)

- 1 x Cap

- 1 x Cam

- 1 x Aluminium mending plate (5 holes of 4 mm diameter) (15 mm hole to hole)

- 8 x Aluminium mending plate (3 holes of 4 mm diameter) (15 mm hole to hole)

- 4 x Aluminium brakets (4 mm hole diameter)

- 2 x Aluminium brakets with one hole in each side (4 mm hole diameter)

- 1 x Aluminium L profile 13 cm

- 1 x Aluminium U profile

- 1 x Magnet

- 1 x Flexible PVC pipe (1 m)

- 2 x Threaded rod (15 cm)

- 14 x LED

- 14 x Resistance (180-400 ohms)

- 1 x Hall effect sensor

- 30 x Male pins header

- 1 x SAV-MAKER I board (https://github.com/fmalpartida/SAV-MAKER-I)

- 1 x External battery

- 1 x Pre-drilled board

- 1 x Wood board (Aprox. 230 g)

- Wires

- Screws and nuts (3 and 4 mm diameter)

Step 2: Gear System Assembly

These are the components needed for this:

- 1 x Wood board (350x230x16 mm)

- 2 x PVC pre-drilled board (210x300x3 mm) (15 mm hole to hole) (4 mm hole diameter)

- 3 x 18 Teeth gear (module 1) (4 mm hole diameter)

- 3 x 42 Teeth gear (module 1) (4 mm hole diameter)

- 4 x Metal axes (4 mm diameter)

- 8 x Aluminium mending plate (3 holes of 4 mm diameter) (15 mm hole to hole)

- 4 x Aluminium brakets (4 mm hole diameter)

- 2 x Aluminium brakets with one hole in each side (4 mm hole diameter)

- 1 x Aluminium L profile (13 cm)

- 1 x Flexible PVC pipe (1 m)

- 2 x Threaded rod (15 cm)

- Screws and nuts (4 mm diameter)

First of all, we will assemble the gears and axes as shown above. Then, we will join all the mending plates and the four aluminium brackets to the PVC pre-drilled board with screws and nuts. The next step is to make the structure of the images with the two aluminium brackets and the aluminium L profile.

Finally, we will cut some short pieces of the flexible PVC pipe and join all which we have mounted in the wood board in order to improve the stability of the structure. We have also added two threaded rods in the top corners.

Step 3: Handle Assembly

These are the components needed in this step:

- 1 x Cap

- 1 x Cam

- 1 x Aluminium mending plate (5 holes of 4 mm diameter) (15 mm hole to hole)

- Screws and nuts (3 and 4 mm diameter)

The first step is to make a hole in the center of the cap of 4 mm diameter. We will continue joining the cap to the screw with nuts as shown. The previous nuts are fixed with glue.

To finish this step, we will assemble the mounting pieces to the aluminium mending plate, the cam and the relevant axis. The images above show this procedure.

Step 4: Magnet System Assembly

Components required:

- 1 x Magnet

- 1 x Aluminium U profile

- Screws and nuts

To mount this system, we will assemble the components to the PVC board as shown above. Thanks to the screw, it is possible regulate the magnet distance.

Step 5: LED's Row Assembly

Components:

- 14 x LED

- 14 x Resistance (180-400 ohms)

- 1 x Hall effect sensor

- 30 x Male pins header

- 1 x SAV-MAKER I board

- 1 x External battery

- 1 x Pre-drilled board

- 1 x Wood board (Aprox. 230 g)

- Wires

- Screws and nuts

Firstly, we will make holes on the pre-drilled board as shown above to join it to the SAV-MAKER I and the wood board. The hole to the axis is 6 mm diameter and the others 4 mm. Later, we will paint the board and the wood board black. Then, we can start welding all components to form the desired electronic board as shown in the attached design plans. Only pins are fixed with glue. Next step is to join all with screws, nuts and mounting flanges as seen in the images.

Finally, we will assemble the mounting piece to the relevant axis with the flexible PVC pipe as shown.

The wood board is totally necessary to compensate the moment of inertia. Also, it would be possible compensate it with the external battery. In order to do so, it should be joined in the other way.