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I'm just beginning with circuits, so pardon if this is elementary, but I couldn't figure it out.

I'm building a speaker joining several circuit boards together:

  • a trinket pro
  • a class d amp
  • an FM radio chip.

The trinket controls the class d amp and FM radio via I2C bus(sda/scl).

All these boards need connections to 5V power and ground. On a breadboard this is easy.

Currently, I'm making a rats nest of wires where I twist 2 or 3 wires into one and then solder them.

However, what is the best practice to create power rails and ground rails multiple chips can plug into? Should I be using a perfboard or other tool?

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You need to use a Prototyping Board. Most of them have pre-drilled holes and pre-existing copper tracks.

There are different kinds, it is often just down to your personal preference which one you use.

This one is useful for transferring the layout directly from a breadboard:

enter image description here

This one, "Stripboard", is useful when you have several buses, such as multiple power rails, or signals like clocks, data buses, etc:

enter image description here

There are some other ones where there are no copper tracks on the underneath, just single pads on each hole which enable soldering; a wire is wrapped on pins underneath, and a route created directly to the destination, then the wire soldered:

enter image description here

Other boards not shown might include PCI boards etc for direct insertion into expansion slots on PC motherboards, and so on. There are also some meant for small-pitch surface-mount chips.

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