This project is one of those projects that began a while back. Shortly after we purchased our aircraft, I wondered if I could re-create the lighting used on the plane. I was also playing around with Atmel’s ATTiny 85 chips. These chips are small and do not have much RAM, speed, or GPIO pins, but that was ok for this project. During COVID, the ATTiny chips were about all you could get due to supply chain issues. I made a mock-up on a perf board and then moved into KiCAD for the final schematic and board layout.

This design mimics the white strobe lights (flashing), Nav lights, tail lights (pulsing), and rotating beacon (also pulsing) of a single-engine aircraft. All of those are controlled by the ATTiny 85. Two 2032 coin cell batteries on the bottom power it. The landing light is directly tied to the batteries and is controlled with the push button. The power to everything else is through the slide switch.