Here’s a no-PCB Arduino that doesn’t obscure the DIP footprint of the AVR chip. It’s built on an ATmega88 chip, and includes a programming header, reset button, a couple of filtering caps, and an LED.

We will refer to these article collections as “Breadboards,” “Tools,” and “Components” for short. We’re assuming that we are in possession of a full-size breadboard and associated wires (Components, ...