I always forget the distance between two pins of Arduino header pins, prefboard etc which is actually a standard value. For record the spacing is 0.1 inch which is 2. 44 mm.
1. Arduino Headers:
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Pin spacing: 2.54 mm (0.1 inches) between pins (this is the standard for most Arduino boards, like Uno, Mega, Nano).
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This spacing allows the pins to fit into most breadboards and female headers.
2. Breadboard:
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Standard spacing between holes: 2.54 mm (0.1 inches)
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Breadboards are designed to accept standard 0.1-inch pitch header pins and DuPont jumper wires with 2.54 mm spacing.
3. Perfboard (Stripboard):
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Hole spacing: 2.54 mm (0.1 inches) for typical perfboards.
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This allows for easy use with standard components like resistors, capacitors, and header pins.
🛠️ Why 2.54 mm?
The 2.54 mm spacing (0.1 inches) is a universal standard, ensuring that components (like headers, jumper wires, and ICs) are interchangeable between breadboards, Arduino boards, and perfboards.
Additional Notes:
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IC pins: If you're working with ICs (Integrated Circuits), the 0.1-inch spacing for the pins is also standard for most DIP (Dual In-line Package) ICs.
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Jumper wires: Most jumper wires also use the 2.54 mm (0.1 inch) spacing, which is why they fit perfectly on breadboards and Arduino boards.
