Motorized Toy Car

A colleague of mine came up with this ingenious car design for our Maker Club at the public library. It is made from recycled materials and electronic components easily found at a dollar store. Step 1: Supplies 1.One oblong piece of strong cardboard 5x7.5 inches 2.Two empty Bic-type disposable pen tubes 3.Thin rubber band 4.One water bottle cap with a hole drilled in its centre 5.Two large wheels (cardboard or large vitamin bottle caps with holes drilled in the centre) 6.Two fat rubber bands to put around the large wheels to give them traction (cut the rubber band and hot glue it onto the wheel if it’s too big) 7.One thin cardboard circle with a hole in the centre that is smaller than the big wheel, but bigger than the bottle cap 8.Two small wheels (Large lifesavers) 9.Duct tape 10.Two popsicle sticks 11.Two wooden skewers, one six inches, one seven and a half inches, plus an extra wooden skewer (size doesn’t matter for that one). Sharpen the ends of the shorter wooden skewer 12.Two small pieces of an eraser 13.One AAA battery holder with exposed wires (if yours does not have this, simply strip off some of the plastic coating on both the wires so that you have about an inch of exposed wire). 14.One alligator clip. 15.One toy motor (can buy a small personal fan at the dollar store and take it apart to get the motor or buy one from an electronics store/hobby store) with a ball bearing or small nut soldered onto the end. If you are new to soldering, there are various Instructables on it. 16.Soldering iron and solder
 

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Referensi :
http://www.instructables.com/id/Motorized-Toy-Car/ 

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ROBOT-LINE FOLLOWER

I began work on my first robot about two years ago. For no particular reason, I decided to begin with a line following robot and truth be told, my first attempt at building it was a complete failure. Looking back at my efforts, I believe, for a beginner, I was rather too ambitious. The circuit that I had designed had a bunch of unnecessary stuff which I then believed would give my robot an edge over the others. But it never worked and I had to start all over from scratch. In my second attempt, I managed to get the robot on track. As delighted as I was with my first robot, it was nowhere near where I wanted it to be. I took it to a couple of competitions and not much to my surprise, it failed in both of them. I knew it was time to make some major changes in the design. In my third attempt, (actually, it wasn’t the third, it was a revision of my second attempt) I updated the firmware and came up with a much more stable and accurate version. It performed well when tested and much to my delight, it finished first in two competitions and second in another. Though I was proud with what I had achieved, I felt that the robot was visually rather unappealing. And you’ll come to know why from its picture given above. It had wires running all over it and I had no other option but to rebuild it. A month or so later, I had the robot all ready and that is the current version of my first robot. In this instructable I will guide you through the steps that I've followed in building the current version of my robot. It’s one of those robots which belong to the “scratch-built” category. You might find it difficult to find all the parts that I have used. So I insist you to read through the steps that I have followed, and then implement it in your own way with the parts that you've found. This instructable requires that you are familiar with the following: • Soldering and related equipments • Hand tools like screwdrivers, wire cutters and strippers • Reading schematics and connection diagrams • C/C++ programming for AVR microcontrollers (optional)


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Referensi :
http://www.instructables.com/id/Robot-Line-Follower/

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