Step 1: Tools & Materials
- A Box
- A Continuos rotation Servo (Mine's from parallax)
- Spare cardboard
- Two Limit switches (From RadioShack)
- A Metal Coat Hanger (From Laundry Places)
- Perfboard (From RadioShack)
- Wires (From RadioShack)
- Resistors (All 10K)
- Headers (From HSC Electronics)
- An Arduino (From Italy :D)
- A power switch (From an old Power Supply)
- L brackets (Cardboard works to)
- Some thread
- A Hot glue gun
- A soldering iron
- Heavy duty wire cutters
As you can tell, you can pretty much recycle everything, or find in around the house.
Step 2: The Circuit
Step 3: Program It!
Step 4: Assembly - the Arm
Take your metal coat hanger and cut off a 5" piece. Then, straiten out the piece with some pliers. Then measure 1" on the coat hanger segment. Bend at that point until you get a 90 degree angle. It should look like the picture below.
By the way, the main reason for choosing hot glue is because it comes off without damaging other parts. That being said, you can attach the parts any way you like. 3D printer is preferred. Once I finish my reprap, I'll upload the new files. In the mean time, anyone is welcome to post the in the comments!
Ok, The next step it to attach the arm to the servo. You can do this with hot glue very easily. Once you do this, your servo-arm thing is done! Next we'll attach the servo to the box.
Step 5: Assembly - the Servo
Once this is done, hot glue the servo to the cardboard piece. Make sure it is strait.
Step 6: Assembly - the Switches
Secure the limit switches. How I did this was by marking where I wanted with a pencil. This mark will be were the bottom of the limit switch will be. Next, take your L-Bracket and hot-glue it to the box with the vertex of the L where you put the pencil mark. Then, glue down your limit switch perpendicular to the L bracket. To test it, take your servo-arm and make sure it pushes down the limit switch.
Do the same thing with the other side except mount it at a 45 degree angle. You can then test it the same way.
Step 7: Adding Thread
Attaching thread is pretty strait forward. Basically, take a 3" piece of thread and measure from the end in 1". Next, fold the vertex of the one-inch point and glue it to itself. This will make loop in the thread.
Put the loop of the thread around the servo-arm and hold the thread to the top of the box. Push the arm down with your other hand and make sure the place you are holding the thread slides nicely on the bar. Once you have it in the right place, hot glue it down. The thread should slide freely on the arm. We're almost done!
Step 8: Finish!
If you have any questions please feel free to comment. If you have any suggestions for me, help is always appreciated. Also, If you liked this instructable, please vote for me in the microcontroller contest, make it move contest, or the USB contest! That would be awesome!