So you have that circuit designed and ready. You did some computer aided simulations and the circuit is working great. Only one thing left! You need to create a printed circuit board for the circuit so you can see it in action! Whether your circuit is a project for school/college or is a final piece of electronics in a professional product for your company, implementing your circuit on a PCB will give it a much better professional look besides giving you an idea of how the finished product will look like!
This article will show you the different methods by which you can create a printed circuit board (PCB) for an electrical/electronic circuit using different methods suitable for small to large circuitry.
Steps
1 Choose a method to use for creating the PCB. Your choice will usually be based on the availability of materials needed by the method, the technical difficulty level of the method or the quality of PCB you desire to obtain. Here's a brief summary of the different methods and their main features that will help you decide:
•Acid etching method: this method requires extreme safety measure, the availability of many materials such as the etchant and it is somewhat slow. The quality of PCB obtained varies according to the materials you use but generally, it is a good method for simple to intermediate levels of complexity circuits. Circuits involving more close wiring and tiny wires usually use other methods.
•UV etching method: this method requires more expensive materials that might not be available everywhere. However, the steps are simple; it requires less safety measures and can produce finer and more complicated circuit layouts.
•Mechanical etching/routing method: this method requires special machines that will mechanically etch away unnecessary copper from the board or route empty separators between wires. It can be expensive if you intend to buy one of those machines and usually leasing them requires the availability of a workshop nearby. However, this method is good if you need to create many copies of the circuit and also can produce fine PCBs.
•Laser etching method: this is usually used by large production companies, but can be found on some universities. The concept is similar to mechanical etching but LASER beams are used to etch the board. It is usually hard to access such machines, but if your local university is one of the lucky ones having such machine, you can use their facilities if they allow it.
2 Create the PCB Layout of your circuit[1][2]. This is usually done by converting your circuit's schematic diagram into a PCB layout using PCB layout software. There are many open source software packages for PCB layout creation and design[3], some are listed here to give you a head-start:
•PCB
•Liquid PCB
•ShortCut
3 Make sure you gathered all the materials needed by the method of your choosing.
4 Draw the circuit layout on the copper coated board. This is only applicable in the first two methods. More details can be found on the detail section of your method of choice.
5 Etch the board. Look for the details sections for how to etch the board. This process removes any unnecessary copper from the board leaving only wiring of the final circuit.
6 Drill mount points. Drilling machines used for that are usually custom machines designed specifically for this purpose. However, with some adjustments a usual drilling machine will do the job at home.
7 Mount and solder the electronic components on board.
