This is a work in progress, an article about the various types of prototyping and breadboarding electronic circuits.
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In any project eventually the next step is building the circuit. This applies to one time knock offs by hobbiest to a professional who is building the 1st round of a circuit before turning it over to manufacturing. For home users the projects may wind up as hardware that will serve some practical application to an experiment that will be disassembled to reuse the parts.
Many of the terms used for these circuits are ambiguous, so I will define them as I go. Many people will disagree with the specific definitions.
Prototypes
A prototype is usually the first attempt at building a circuit that has not been built before. It doesn't have to be the first, occasionally more than one version is built to improve on the previous version, or a hobbiest is building a circuit from a schematic for their own use.
Generally, when building a prototype of any sort, neatness counts. This can not be emphasized enough. A rats nest of wiring may work, but the neater a project looks the more likely it is to work the first time it is power up. Part of this is the thought you put into the layout means you are less likely to make mistakes, and part of it is the wires are likely to be more point to point. Keeping wires short as possible is important, especially with higher frequencies.
Breadboards
This is probably the most ambiguous term out there. It's roots are based in the 1920's and 1930's, where enthusiasts would buy a breadboard (literally, meant to be used for cutting bread) or grab one from the kitchen and start mounting terminal strips and tubes and wiring their circuits. When I was a teenager I used old lumber and these kind of terminal strips to breadboard various types of transistor circuits, mostly oscillators.
This part is available from Radio Shack (PN 274-688), but many other sizes can be bought from other vendors, such as this assortment from Dan's Small Parts and Kits.
Breadboarding can also mean using a protoboard, similar to this...
My personal definition of a breadboard is any type of construction technique other than printed circuit boards. It is a generic term. Protoboards will be discussed later in this article.
Perf boards
This type of prototyping or circuit building dates to the 1950's, when component sizes started coming down, and transistors were just getting started. They were a fiber glass or phenol board with holes drilled at regular intervals. There were also tiny tubes (AKA valves) that were meant to solder into a board similar to transistors. Early perfboards had no copper pads, but latter versions with pads were developed . The more common types use the 0.1" spacing. It is interesting to note that metric is slowly taking over component dimensions, but the American system is still very common because DIP chip packages were well established in the 1960's. Many people start with a blank board and build, but I like to lay it out on paper first. Here is an example of how this would work...
Project: High Power LED Flasher
It has the advantage of handling medium frequency RF applications very well, especially if the leads are kept short and the circuit layout kept neat. The schematic will offer major hints in how the perfboard should be laid out.
The number of perf board derived schemes have expanded. A few are shown below. Generally they are referred to as strip boards, because the patterns have strips to allow easier construction.
The ultimate in stripboard is Veroboard, a trademarked in the UK by Vero Technologies Ltd. It is a bit different from other examples in that the hobbiest will need to slice and remove small pieces of copper strip with an exacto knife to isolate parts of the circuit. It can be very neat in appearance, and works well for high frequency applications. Shown below is a drawing of a blank board along with an FM transmitter around 100MHz made with this material.
............................................................................................................................................Courtesy of AudioGuru
This material can be hard to get in the southern United States, but is worth mentioning as it is fairly common in the Northern United States, Canada, and the UK.
**************************
In any project eventually the next step is building the circuit. This applies to one time knock offs by hobbiest to a professional who is building the 1st round of a circuit before turning it over to manufacturing. For home users the projects may wind up as hardware that will serve some practical application to an experiment that will be disassembled to reuse the parts.
Many of the terms used for these circuits are ambiguous, so I will define them as I go. Many people will disagree with the specific definitions.
Prototypes
A prototype is usually the first attempt at building a circuit that has not been built before. It doesn't have to be the first, occasionally more than one version is built to improve on the previous version, or a hobbiest is building a circuit from a schematic for their own use.
Generally, when building a prototype of any sort, neatness counts. This can not be emphasized enough. A rats nest of wiring may work, but the neater a project looks the more likely it is to work the first time it is power up. Part of this is the thought you put into the layout means you are less likely to make mistakes, and part of it is the wires are likely to be more point to point. Keeping wires short as possible is important, especially with higher frequencies.
Breadboards
This is probably the most ambiguous term out there. It's roots are based in the 1920's and 1930's, where enthusiasts would buy a breadboard (literally, meant to be used for cutting bread) or grab one from the kitchen and start mounting terminal strips and tubes and wiring their circuits. When I was a teenager I used old lumber and these kind of terminal strips to breadboard various types of transistor circuits, mostly oscillators.
This part is available from Radio Shack (PN 274-688), but many other sizes can be bought from other vendors, such as this assortment from Dan's Small Parts and Kits.
Breadboarding can also mean using a protoboard, similar to this...
My personal definition of a breadboard is any type of construction technique other than printed circuit boards. It is a generic term. Protoboards will be discussed later in this article.
Perf boards
This type of prototyping or circuit building dates to the 1950's, when component sizes started coming down, and transistors were just getting started. They were a fiber glass or phenol board with holes drilled at regular intervals. There were also tiny tubes (AKA valves) that were meant to solder into a board similar to transistors. Early perfboards had no copper pads, but latter versions with pads were developed . The more common types use the 0.1" spacing. It is interesting to note that metric is slowly taking over component dimensions, but the American system is still very common because DIP chip packages were well established in the 1960's. Many people start with a blank board and build, but I like to lay it out on paper first. Here is an example of how this would work...
Project: High Power LED Flasher
It has the advantage of handling medium frequency RF applications very well, especially if the leads are kept short and the circuit layout kept neat. The schematic will offer major hints in how the perfboard should be laid out.
The number of perf board derived schemes have expanded. A few are shown below. Generally they are referred to as strip boards, because the patterns have strips to allow easier construction.
The ultimate in stripboard is Veroboard, a trademarked in the UK by Vero Technologies Ltd. It is a bit different from other examples in that the hobbiest will need to slice and remove small pieces of copper strip with an exacto knife to isolate parts of the circuit. It can be very neat in appearance, and works well for high frequency applications. Shown below is a drawing of a blank board along with an FM transmitter around 100MHz made with this material.
............................................................................................................................................Courtesy of AudioGuru
This material can be hard to get in the southern United States, but is worth mentioning as it is fairly common in the Northern United States, Canada, and the UK.
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