The Conehead is the next series of critter based PCBs (past ones are The Lady, The Gent, and The Monarch). It's an audio circuit that synthesises the sound of a cricket. It uses three oscillators interacting with each other to create the distinctive sound. Using a small speaker and a phototransistor, the cricket will change its chirping frequency depending on the amount of light it 'sees'.
My second month of Boldport Club is #24 The Conehead. It’s a custom PCB design of a cricket and it chirps based on how much light the “eye” can see. According to video timestamps it took about an hour to assemble the kit and it was a lot of fun using the electronics components in different ways.
See my blog for more.