Breadboards & Power

Breadboards hold your parts and connect them without wires; batteries and power supplies provide power independent of the board.

How breadboard connections work

• In each half, the five holes of a column are connected (rows a–e and rows f–j).
• The half and full breadboards have two power rails on each side. Each rail is connected along its whole length.
• Parts dropped on a breadboard snap to the holes and connect automatically.

Hole names used in diagram.json look like 17t.c (column 17, top half, row c) and tp.5 (top + rail, hole 5).

Breadboard & Power

• Breadboard miniComponent legs placed exactly on a hole connect automatically. Each column of 5 holes (a–e, f–j) is connected together.
• Half breadboardComponent legs placed exactly on a hole connect automatically. Columns a–e and f–j are connected in groups of 5 holes; the + and − rails along the edges run the length of the board.
• Full breadboardComponent legs placed exactly on a hole connect automatically. Columns a–e and f–j are connected in groups of 5 holes; the + and − rails along the edges run the length of the board.
• 9V batteryPower source without an Arduino: + as voltage, − as ground.
• 2xAA battery (3V)Power source without an Arduino: + as voltage, − as ground.
• Breadboard power supply moduleOutputs 5V, 3V3, and GND. Turn on its switch from the toolbar or click it during simulation.
• DC adapter+ is the supply, − is ground. Good for 12V loads such as pumps, solenoids, LED strips, and coin acceptors. Tie − to the board GND.
• 18650 Li-ion battery (3.7V)3.7 V power source: + is the supply, − is ground.
• LM2596 step-downIN+ and IN− to an adapter (for example 12V). OUT+ gives the chosen voltage, OUT− is tied to IN−.