555 Piano

Design the PCB

Design It

  • You're going to have a go at creating a PCB of your circuit.
  • First, you will need to open the circuit you designed from week 3. Make sure you delete the virtual multimeter.
  • Click the button that looks like this at the top of the workspace.button.png
  • Click Next and then choose Rats Nest; No Placement or Routing and check the box for allowing customisation.


  • Next and Next again
  • For each of the PTM switches, you need to make sure you're choosing 10x10 switches. Double click the switch in the list and change it.


  • Now you can click through the remaining menus and convert your circuit to a PCB, this is done by clicking on next, until you get to finish.
  • You'll need to try and place the components so that the green connecting wires don't overlap. You might find it's easier to delete the rectangular board to begin with.
  • Once you are happy with the placement, try and connect up the components with tracks.
  • Here's an example, but try and design your own.
  • Please note: The potentiometer (variable resistor) looks different to the example below, but if you follow the green lines, you will be able to do it.




Badge It - Silver

  • Add the image of the PCB to your write up.
  • Explain any placements that you found tricky to solve.
  • Upload your work to BourneToLearn.com

Design the case

  • You're going to have a go at creating a case to house your instrument.
  • Here are some tips to help you:
  • The PCB is 20 mm by 150 mm and 2 mm thick.
  • You can use fly leads to extend the buttons, the speaker or potentiometer to increase the flexible of your design.
  • You either Solidworks or 2D Design to make your case.
  • You may need a pencil and paper sketch to get you started.
  • You need to think about the parts that are going to fit together to make your instrument.
  • Think about ergonomics, how are you going to play your 'sweet' tunes?

Design It

  • We're going to use Solidworks to design our instrument.
  • Hopefully you have already had lots of experience with Solidworks last year, so for this recap section of the project, you'll just be creating a couple of the Solidworks parts and assembling them.
  • In Solidworks you start by creating a 2D sketch. You can then convert this to a 3D part. You can then join parts together to make a 3D assembly.

Try It

  • In Solidworks you have to ensure all your drawings are fully defined.
  • This means that the software must know the dimensions of every line you draw.
  • Quite often the software is able to work out a dimension of a line, from others you have provided.
  • Video of building two parts of the case
  • Video of mating
  • Video of converting Solidworks to 2D Design for laser cutting

Badge It - Gold

  • Upload a screenshot of some parts for your instrument and to BourneToLearn.com.

Badge It - Platinum

  • Upload a screenshot of your fully designed instrument to BourneToLearn.com.