The web is full of inferred circuits for the ubiquitous flip flap flower, but I haven't been able to find an actual one, so I burned off the ominous black blob that supposedly hides the 'brain' of the oscillating solar circuit, and am still no wiser. I was expecting an arrangement of semiconductors, diodes, transistors or something under the blob, but all I see is a copper pattern bonded directly to the PCB without any obvious semiconductor material (unless the epoxy black blob is a semi?). I’m fairly sure I didn’t destroy anything during the burn off because I scraped one off as well and got the same pattern. Can anyone figure it out?