A Figurative Battle Royale in Stompbox Prototyping

Let’s discuss perfboard versus PCB versus stripboard (a.k.a. Veroboard) when you’re ready to transfer a stompbox circuit design — which should done on breadboard since it is reusable and easy to modify — to something more permanent to be enclosed in an effects pedal. (If you’ve got the parts to spare it’s a good idea to leave your design on the breadboard for visual reference and in order to take measurements with a digital multimeter if the permanent design requires troubleshooting.)

PCB Versus Perfboard

Nowadays the majority of stompboxes and amplifiers are assembled on printed circuit boards (PCBs), which are a piece of fiberboard or plastic on which all components are connected by internal conductive traces — you simply solder the components into their holes and the connections are good to go. If you’ve ever bought a stompbox kit, chances are it came with a PCB and a bag of parts, which is a quick and easy way to build an effects pedal.

The real benefit of using perfboard in our context is that you’ll develop a greater understanding of how circuits come together and work and you’ll make turning a simple schematic into a working circuit in future designs much, much easier. Perfboard consists of tiny, copper-lined holes in rows and, when designing circuits using perfboard, you’ll manually manually make all the circuit’s connections on the back of the board. Yes, perfboard is slower and more tedious than using a (so to speak) ready-made PCB, but the understanding you’ll gain by doing everything yourself will be invaluable in your subsequent stompbox designs.

Perfboard Versus Stripboard (Veroboard)

Stripboard, another alternative to PCB,  is similar to your average breadboard in that all the holes in a row are already connected. Designing a stompbox circuit with stripboard is also a great way to gain knowledge regarding the way circuits work during design. However, perfboard is more desirable than stripboard for novice stompbox builders because it’s considerably easier to find and a little more demanding and time-consuming, which will lead to a more thorough understanding of stompbox design that will lodge itself in the back of your brain as you build your next effects pedal.

Note that the preferability of perfboard over stripboard or PCB is aimed at novice pedal builders who may not have an established grasp of/experience in circuitry. When it comes to newbie stompbox designers, perfboard is the hands down winner of the figurative battle royale in stompbox prototyping due to the greater understanding of circuit designs it affords.

Stompbox Design with Solderless Breadboards

Let’s say you’ve come up with a novel new circuit for the next Tubescreamer, Ibanez AD-80 delay, etc. that you just know guitarists around the globe will be lining up for one day. You thoughtfully and carefully design your pedal, build it with the finest NOS components from some abandoned Soviet warehouse, meticulously solder your circuit with your high-dollar solder iron or soldering station, and you fire it up for the first time . . . and it doesn’t work, or it doesn’t sound quite how you expected it to.

That’s why solderless breadboards (henceforward called SoBs) are invaluable to stompbox builders: they allow you to quickly and easily design, tweak, and test a circuit without committing to a permanent, finalized design. SoBs come in barebones versions as well as more complex units with built-in power supplies and digital multimeters and mounting brackets and the kitchen sink.

How SoBs Work

Each hole in the SoB’s plastic rail contains a spring-loaded contact that grips the inserted component’s lead while letting you easily remove it. Each column of five holes is internally connected. You can test this by inserting short lengths of 22 or 24 AWG wire into any two holes in a column and measuring between the wires with your digital multimeter in the continuity position (or the lowest resistance scale if your DMM doesn’t have the continuity position).

SoBs have busses, which are a row of horizontally-connected holes that provide a common ground and allow you to distribute power to the necessary points in the circuit. Some SoBs have busses that are connected all the way across, while other are split in the middle — meaning you’ll have to connect the halves for full-length continuity.

If you’re a stompbox builder, do yourself a favor and get yourself an SoB; in addition to being reusable, they’ll really speed up stompbox circuit design, testing, and tweaking before you put time and money and elbow grease into your prototype pedal.

What Good is a Breadboard?

Breadboards are reusable solderless circuit boards (PCBs) with electrical contacts arranged in a number of rows and columns. Because breadboards have built-in electrical contacts, you don’t need nearly as many wires as you would have had to use without the circuit board, which consolidates what could’ve been a rat’s nest of electronic components and wires into a neatly arranged circuit. Your components are inserted across tracks and, if required, tracks can be joined with wires. The most common breadboard used today, with its white plastic and pluggable (solderless) contacts, was designed in 1971 by Ronald J. Portugal.

Most often breadboards (also known as plugboards) are used to construct a temporary circuit for prototyping or general experimentation; since breadboards don’t require solder, you can quickly and easily assemble and disassemble a circuit design . . . and you can use the same breadboard later for another design. These features make breadboards especially appropriate as school laboratory equipment, allowing students to expand their knowledge of electronics by building circuits from schematics — a type of procedural knowledge — and this sort of hands-on project will help students retain what they’ve learned.

Breadboards are also commonly used by hobbyists and professionals looking to test components or when designing/building complex circuits, because these solderless boards are “lower stakes” than stripboards (veroboards), which are used to build permanent soldered prototypes or one-offs and which can’t be reused without going to a whole lot of trouble. Since these breadboards are reusable, they are an economical choice for those who frequently build prototypes or experiment with circuitry.

So, as you can see, breadboards do a whole lot of good in the classroom and in the hands of hobbyists and professionals who need an easy, economical way of experimenting and designing complicated circuit boards.