PCB design has come a long way since everything was green. This FM radio is pretty much just a PCB, with the controls and even the speaker mounted directly onto the one printed circuit board. This device is designed not just to be simple, but to be affordable too: the components are all easily obtained, and include a 32-bit RISC-V microcontroller, a 128 × 32 pixel OLED display, and a Li-ion battery charger. The 3 W speaker isn’t going to give you the best sound quality, but is just the job if you want to listen to the cricket commentary on the radio (or even baseball, if that’s what floats your boat).

This design is barely more than a single PCB – there is a 3D-printed case, but to hide those electronics would be a crime.