My first dimension that I used in the video was a width of 21mm. The reason for this is that the distance between the smaller rectangles and the outside edge is really small using my first dimension. So instead of using a width of 23mm, try to go a little bigger. One more suggestion would be in making the second arm wider. The razor blade cuts it more precisely and helps from cutting towards the outer edge of the arm. Using a pair of scissors can be hard to cut them out. The only suggestion I have here is when it comes to cutting out the smaller rectangles in the second arm you should use a razor blade. Once you have drawn the arms out on the cardboard, you can use the pair of scissors to cut them out. The other 3 edges can be any length that you would like or any shape. The width of the third arm at the bottom is 22mm while the height of the left and right side of the arm is 33mm. The final arm has only two important dimensions. Just make sure you have the inner rectangles centered. So probably an overall wider width for arm 2 can help with that. One thing that I have noticed was that the dimensions marked by red arrows were pretty thin that sometimes the arm would bend. Red arrows mean a distance of 5mm while the green arrows mean a distance of 9mm. These distances can be seen by the arrows and their color. It will also be 9mm apart from the bottom and the top edge. The edges of these cuts will be 5mm away from the outer edge of the entire arm on the left and right. Each inner cut is 13mm wide with a height of 23.45mm. The second arm in the middle with the two rectangular cuts inside of it will hold two servos. This has a height of 90mm with a width of 23mm. The dimensions of the three arms can be seen below in the drawings. Now it is time to draw out the arms on a piece of cardboard that you can find around. Hot Glue Gun or any other means to glue/hold parts together.But if you get them together with the breadboard it will help you with costs and time.įor this project you will need the following tools: Jumper Cables/Wires - You will also need some jumper cables/wires to make connections between the Arduino and the breadboard. You will also need a battery pack that fits 4 AA batteries. But it is inexpensive.īatteries - A 9V battery can be used to power the Arduino or you can just power it through a USB cable. The only downside is that it's coming from China. The following link is actually for a breadboard that comes with jumper wires. RadioShack sells them but the price could be much higher. But you could probably find a cheap one on eBay. The following link is for 5 servos in the US:Ī Breadboard - The breadboard used in this project was actually bought at my school for $5. Just be aware that if you order from China, shipping may take a while. Here are some potentiometers at the following link on eBay:ģ Micro Servos (SG90) - These servos can also be found on eBay for fairly low prices. Just make sure you get linear potentiometers and not a log type. The ones I used were 22k but 10k potentiometers seem to be cheaper. Any type of potentiometers with at least 3 prongs should be able to work. Shop around to find cheap prices for them. You can buy a clone at the following link for about $15:ģ 10k Potentiometers - This can be found anywhere such as Amazon, eBay, and Adafruit. The following parts are necessary to complete this project:Īn Arduino Uno - The Uno can be a genuine Uno or to lower costs you can obtain an Arduino clone that works the same way. This project is fairly simple and based on the Arduino's IDE example "Knob." I will be covering on what parts are necessary and where to get them. This post I will be covering on how to create a simple robotic arm out of cardboard pieces.
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