![]() We drew in some rectangles into the centre section to assist with ensuring that we placed these sections correctly. Then we drew in the sections that the resistor leads pass over before they are bent into shape, as shown above. The above image shows the centre section on which the resistor body will rest when the leads are to be bent, It was drawn as a rectangle and then the fillets were added to make it round at either end. The area being drawn is highlighted, we’ve left the entire design in each image so you can see how it relates to the entire design. The images below detail the order in which the various parts of the finished design were drawn in 2D. ![]() Every step of this 2D design process was carried out using various functions within the sketch menu as shown below. Step 3 - Creating a 2D design that delivers our design aims:Īfter performing a couple of simple experiments in 123D Design we determined that the whole design could be sketched in 2D and then easily extruded out to make a 3D model. We found that our initial thoughts were in line with how designs for this type of tool were typically laid out. Before proceeding to the actual design stage we did a little research on google to get a rough idea of the look of commercial products. To make the tool a little more useful we decided to design it so that it could be used for a variety of hole spacing’s 0.7 cm, 0.8 cm, 0.9 cm, 1.0 cm, 1.1 cm and 1.2 cm. In most of our Electronic project kits, the holes on the PCB that the leads of a resistor go through are spaced 1.0 cm apart. We broke out the Vernier callipers and measured every aspect of a resistor, noting down the measurements on a notepad as we did so. In order to produce the design we needed to know the physical dimensions of a resistor and decide what dimensions that the leads would be bent to. The rest of our design aims would begin to emerge once the physical measurements of a resistor had been obtained. It also needed to be of sufficient length to be user-friendly. ![]() We tried to keep this firmly in mind through every step of the process. We wanted it to be easy to design and to also lend itself to being 3D printed without any issues. We wanted to produce a tool that allowed us to bend the leads of a resistor in a uniform way so that when they are placed on a PCB and soldered they all look the same, with the body of the resistor being centred between the holes.
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