page_title: Breadboard
section_title: Evolution
hierarchical_section_title: Breadboard / Evolution
caption_attribution_description: English: 1920s TRF radio manufactured by Signal Electric MFG. CO. located in Menominee Mich. Demonstrates early radio construction methods using "breadboard"
context_page_description: A breadboard is a construction base for prototyping of electronics. Originally the word referred to a literal bread board, a polished piece of wood used for slicing bread. In the 1970s the solderless breadboard became available and nowadays the term "breadboard" is commonly used to refer to these.
  Because the solderless breadboard does not require soldering, it is reusable. This makes it easy to use for creating temporary prototypes and experimenting with circuit design. For this reason, solderless breadboards are also popular with students and in technological education. Older breadboard types did not have this property. A stripboard and similar prototyping printed circuit boards, which are used to build semi-permanent soldered prototypes or one-offs, cannot easily be reused. A variety of electronic systems may be prototyped by using breadboards, from small analog and digital circuits to complete central processing units.
  Compared to more permanent circuit connection methods, modern breadboards have high parasitic capacitance, relatively high resistance, and less reliable connections, which are subject to jostle and physical degradation.
context_section_description: In the early days of radio, amateurs nailed bare copper wires or terminal strips to a wooden board (often literally a board to slice bread on) and soldered electronic components to them. Sometimes a paper schematic diagram was first glued to the board as a guide to placing terminals, then components and wires were installed over their symbols on the schematic. Using thumbtacks or small nails as mounting posts was also common.
  Breadboards have evolved over time, with the term now being used for all kinds of prototype electronic devices.  For example, US Patent 3,145,483, was filed in 1961 and describes a wooden plate breadboard with mounted springs and other facilities.  US Patent 3,496,419, was filed in 1967 and refers to a particular printed circuit board layout as a Printed Circuit Breadboard.  Both examples refer to and describe other types of breadboards as prior art. 
  The breadboard most commonly used today is usually made of white plastic and is a pluggable (solderless) breadboard. It was designed by Ronald J. Portugal in 1971.
caption: This 1920s TRF radio manufactured by Signal was constructed on a wooden breadboard.
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