Odometer

Lately, I've heard a lot of junk. Due to our consumerist lifestyle, we discarded equipment in good working condition to buy the latest release. Thus, we contribute more to the growth of this garbage. My intention was to recycle this type of material and inspire others to do the same.

Materials needed:

- A reader of CD's

- A piece of cardboard 15X30 cm

- An old cd

- Reedswitch a normally open (magnetic drive key easily found in electronics stores)

- A calculator

- 2 screws with washers and nuts (optional)

- Wires

- Glue

- Hot glue

- A rubber band to hold money

Step 1: Separating Material

Open the reader, highlighting the optics, the engine that runs the cd and the amount of metal is in above the engine, setting the album to him. At the optics, remove the two magnets. Be careful because these two magnets are very strong and can unite, injuring the fingers or hand.

The cardboard was cut into three strips of 25 x 5 cm.

The reed switch was stuck on a small piece of cardboard, the edges with hot glue to be handled because it is very fragile.

Open the calculator and connect a wire to connect each of the SAME button and set aside.

I soldered the wires on a jumper and I fixed it so that no contact from the outside. This way when not in use, simply unplug the wires.

Comments

[Husham Samir]

Very Nice !!!
I made similar project when I was in college but I use optical coupler as shown in web site below
http://hushamsamir.tripod.com/distance_meter.htm

[PeckLauros]

The optical coupler is a cheap and effective solution. However, I decided to use materials I had at home. And the reed switch very well attended. I like your project. Good job.

[supertroopa86]

Great idea! Although I would suggest rewording a few of the steps as i got confused about how to wire the calculator

[PeckLauros]

Hello in the calculator, the button "equal" has two contacts like a key open. It is simply solder two wires in such contacts.

[vahid_you2004]

I was working on the same thing for the transform it contest by a shaft encoder from an old mouse and a PIC microcontroller, but you did it first, good luck.

[PeckLauros]

Thanks. I thought the same thing about your crazy mouse...hehehhe. Incredible!

[mathieulj]

The basic idea is quite neat, although I would likely make a few modifications if i built one. Ex... more magnets( more precision), rubber rimmed wheel(reduce slipage), and i might go all out and do some microcontroller action but that overkill.

[PeckLauros]

Good idea. I thought the same. But the main idea was to make somethig easy to make and faster. thanks to share your idea