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How to use a Breadboard - A Galco TV Tech Tip | Galco

713 views · Published 4 May 2018 · 2:18 · Indexed 20 October 2026

Channel: GalcoTV · 2018 · Science & Technology

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Breadboards typically feature numbers, letters, and plus and minus signs written on them. These labels help you locate certain holes on the board so that you can follow directions when building a circuit. 

On either side of most breadboards are strips of holes surrounded by plus and minus signs. These strips are known as buses or rails and are used to supply electrical power to your circuit when it is connected to a battery pack or external power supply. When circuit directions refer to the positive bus, then it is referring to the strip of holes closer to the positive side line. Similarly, the negative or ground bus refers to the strip of holes closer to the negative line. You may also hear the term “power buses” or rails used to refer to both of the buses together, rather than just the positive one. Technically, there are no physical differences between the different buses. The labels just make them easier to organize your circuit. 

Some, but not all of the holes are connected. The buses are connected vertically, so all of the negative bus holes are connected to one another in a series vertically and all of the positive bus holes are connected to one another in a series vertically. However, buses on the opposite sides of the breadboard are not connected to each other, but they can be connected through the use of jumper wire.

The half-rows of holes are connected horizontally. For example rows 1 A-E will be connected, and then rows 1 F-J will be connected, but they will not be connected across the gap. 

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With respect to the usage, installation or assembly of any products described in this video, Galco Industrial Electronics, Inc., a Michigan corporation, encourages you to follow the requirements and/or guidelines of:  i) the Occupational Safety and Health Act of 1970, Public Law 91-596, as amended,  and all laws, rules and regulations implemented in relation thereto;  ii)  the National  Electric Code®;  and  iii) NFPA 70E®.  Any installation, assembly or work described in this video should be performed by a qualified licensed electrician.
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