Raspberry Pi Hardware Engineer Roger Thornton explained the change in a recent blog post. Working with its manufacturing partner Sony, the UK organization gradually implemented a ...

The task is to solder up our own special version of the SMD Challenge Kit from MakersBox that includes an SOIC8 ATtiny85 to drive LED/resistor pairs in 1206, 0805, 0603, 0402, and 0201 packages.

The array is just over one centimeter across. Using a combination of vices and pliers he soldering each SMD onto his structure one by one. Each LED anode is tied together on each horizontal layer.