Small portable soldering irons are all the rage so ... to avoid having to open the 3D-printed case too often. On the PCB is an Arduino, a MOSFET, and some instrumentation to monitor the battery ...

Actually, the last thing the world needs is another Arduino ... an exercise in PCB design, we’ll give this a thumbs up, but this could also be used for an ‘introduction to soldering ...

Below we see the setup on my kitchen table when I was soldering stackable headers onto an Arduino Nano: In fact, this ties in neatly to my recent column: Basic documentation — is it too much to ask ...

The PCB Direct virtual breadboard has been created to allow anyone to create interactive virtual breadboard circuits for platforms such as Arduino ... you can use to layout electronic circuits ...