This is one of my circuit board beetles. The beetle is a custom made circuit board that I designed. Actually, it's 4 different circuit boards, including the wings that are made from flexible kapton circuit board material. Inside the beetle is a 555 timer oscillator circuit that fades the LED on and off, like it's breathing. The eyeballs are USSR vintage AL310A red LEDs. The circuit board in the background was a scrap board from a really old tape drive, and the frame is made from recycled pallet wood.